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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">
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<title>Visual formatting model details</title>
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<h1><a name="q0">10 Visual formatting model details</a></h1>
<div class="subtoc">
<p><strong>Contents</strong>
<ul class="toc">
<li class="tocline2"><a href="visudet.html#containing-block-details" class="tocxref">10.1 Definition of "containing block"</a>
<li class="tocline2"><a href="visudet.html#the-width-property" class="tocxref">10.2 Content width: the <span class="propinst-width">'width'</span> property</a>
<li class="tocline2"><a href="visudet.html#Computing_widths_and_margins" class="tocxref">10.3 <del>Computing</del><ins>Calculating</ins> widths and margins</a>
<ul class="toc">
<li class="tocline3"><a href="visudet.html#q4" class="tocxref">10.3.1 Inline, non-replaced elements</a>
<li class="tocline3"><a href="visudet.html#inline-replaced-width" class="tocxref">10.3.2 Inline, replaced elements</a>
<li class="tocline3"><a href="visudet.html#blockwidth" class="tocxref">10.3.3 Block-level, non-replaced elements in normal flow</a>
<li class="tocline3"><a href="visudet.html#q7" class="tocxref">10.3.4 Block-level, replaced elements in normal flow</a>
<li class="tocline3"><a href="visudet.html#q8" class="tocxref">10.3.5 Floating, non-replaced elements</a>
<li class="tocline3"><a href="visudet.html#q9" class="tocxref">10.3.6 Floating, replaced elements</a>
<li class="tocline3"><a href="visudet.html#abs-non-replaced-width" class="tocxref">10.3.7 Absolutely positioned, non-replaced elements</a>
<li class="tocline3"><a href="visudet.html#abs-replaced-width" class="tocxref">10.3.8 Absolutely positioned, replaced elements</a>
<li class="tocline3"><a href="visudet.html#q12" class="tocxref"><ins>10.3.9</ins> <ins>'Inline-block',</ins> <ins>non-replaced</ins> <ins>elements</ins> <ins>in</ins> <ins>normal</ins> <ins>flow</ins></a>
<li class="tocline3"><a href="visudet.html#q13" class="tocxref"><ins>10.3.10</ins> <ins>'Inline-block',</ins> <ins>replaced</ins> <ins>elements</ins> <ins>in</ins> <ins>normal</ins> <ins>flow</ins></a>
</ul>
<li class="tocline2"><a href="visudet.html#min-max-widths" class="tocxref">10.4 Minimum and maximum widths: <span class="propinst-min-width">'min-width'</span> and <span class="propinst-max-width">'max-width'</span></a>
<li class="tocline2"><a href="visudet.html#the-height-property" class="tocxref">10.5 Content height: the <span class="propinst-height">'height'</span> property</a>
<li class="tocline2"><a href="visudet.html#Computing_heights_and_margins" class="tocxref">10.6 <del>Computing</del><ins>Calculating</ins> heights and margins</a>
<ul class="toc">
<li class="tocline3"><a href="visudet.html#inline-non-replaced" class="tocxref">10.6.1 Inline, non-replaced elements</a>
<li class="tocline3"><a href="visudet.html#inline-replaced-height" class="tocxref">10.6.2 <del>Inline,</del><ins>Inline</ins> replaced <del>elements</del> <del>block-level,</del><ins>elements,</ins> <ins>block-level</ins> replaced elements in normal flow, <ins>'inline-block'</ins> <ins>replaced</ins> <ins>elements</ins> <ins>in</ins> <ins>normal</ins> <ins>flow</ins> and <del>floating,</del><ins>floating</ins> replaced elements</a>
<li class="tocline3"><a href="visudet.html#normal-block" class="tocxref">10.6.3 <del>Block-level,</del><ins>Block-level</ins> non-replaced elements in normal <del>flow,</del> <del>and</del> <del>floating,</del> <del>non-replaced</del> <del>elements</del><ins>flow</ins> <ins>when</ins> <ins>'overflow'</ins> <ins>computes</ins> <ins>to</ins> <ins>'visible'</ins></a>
<li class="tocline3"><a href="visudet.html#abs-non-replaced-height" class="tocxref">10.6.4 Absolutely positioned, non-replaced elements</a>
<li class="tocline3"><a href="visudet.html#abs-replaced-height" class="tocxref">10.6.5 Absolutely positioned, replaced elements</a>
<li class="tocline3"><a href="visudet.html#q22" class="tocxref"><ins>10.6.6</ins> <ins>Complicated</ins> <ins>cases</ins></a>
<li class="tocline3"><a href="visudet.html#root-height" class="tocxref"><ins>10.6.7</ins> <ins>'Auto'</ins> <ins>heights</ins> <ins>for</ins> <ins>block</ins> <ins>formatting</ins> <ins>context</ins> <ins>roots</ins></a>
</ul>
<li class="tocline2"><a href="visudet.html#min-max-heights" class="tocxref">10.7 Minimum and maximum heights: <span class="propinst-min-height">'min-height'</span> and <span class="propinst-max-height">'max-height'</span></a>
<li class="tocline2"><a href="visudet.html#line-height" class="tocxref">10.8 Line height calculations: the <span class="propinst-line-height">'line-height'</span> and <span class="propinst-vertical-align">'vertical-align'</span> properties</a>
<ul class="toc">
<li class="tocline3"><a href="visudet.html#q26" class="tocxref">10.8.1 Leading and half-leading</a>
</ul>
</ul>
</div>
<h2>10.1 <a name="containing-block-details">Definition of "containing
block"</a></h2>
<p>The position and size of an element's box(es) are sometimes
<del>computed</del><ins>calculated</ins> relative to a certain rectangle, called the <dfn><a name="x0"><span
class="index-def" title
6D50
="containing block">containing
block</span></a></dfn> of the element. The containing block of an element
is defined as follows:</p>
<ol>
<li>The containing block <del>(called</del> <del>the</del> <del>initial</del> <del>containing</del> <del>block)</del>in which the <a href="conform.html#root">root
element</a> lives is <del>chosen</del> <del>by</del><ins>a</ins> <ins>rectangle</ins> <ins>with</ins> the <del>user</del> <del>agent.</del><ins>dimensions</ins> <ins>of</ins> <ins>the</ins> <a
href="visuren.html#viewport"><ins>viewport</ins></a><ins>,</ins> <ins>anchored</ins> <ins>at</ins> <ins>the</ins> <ins>canvas</ins>
<ins>origin</ins>
<ins>for</ins> <ins>continuous</ins> <ins>media,</ins> <ins>and</ins> <ins>the</ins> <ins>page</ins> <ins>area</ins> <ins>for</ins> <ins>paged</ins> <ins>media.</ins> <ins>This</ins>
<ins>containing</ins> <ins>block</ins> <ins>is</ins> <ins>called</ins> <ins>the</ins> <dfn><a name="x1"><span class="index-def"
title="initial containing block|containing block::initial"><ins>initial</ins>
<ins>containing</ins> <ins>block</ins></span></a></dfn><ins>.</ins> <ins>The</ins> <ins>'direction'</ins> <ins>property</ins> <ins>of</ins> <ins>the</ins> <ins>initial</ins>
<ins>containing</ins> <ins>block</ins> <ins>is</ins> <ins>the</ins> <ins>same</ins> <ins>as</ins> <ins>for</ins> <ins>the</ins> <ins>root</ins> <ins>element.</ins>
</li>
<li>For other elements, <del>unless</del><ins>if</ins> the <del>element</del><ins>element's</ins> <ins>position</ins> is <del>absolutely</del> <del>positioned</del> <del>,</del><ins>'relative'</ins> <ins>or</ins> <ins>'static',</ins>
the containing block is formed by the content edge of the nearest
<a href="visuren.html#block-level">block-level</a><ins>,</ins> <ins>table</ins> <ins>cell</ins> <ins>or</ins>
<ins>inline-block</ins> ancestor box.
</li>
<li>If the element has 'position: fixed', the containing block is
established by the <a href="visuren.html#viewport">viewport</a>
<del>.</del><ins>in</ins> <ins>the</ins> <ins>case</ins> <ins>of</ins> <ins>continuous</ins> <ins>media</ins> <ins>or</ins> <ins>the</ins> <a
href="page.html#page-box"><ins>page</ins> <ins>box</ins></a> <ins>in</ins> <ins>the</ins> <ins>case</ins> <ins>of</ins> <ins>paged</ins> <ins>media</ins>
</li>
<li>If the element has 'position: absolute', the containing block is
established by the nearest ancestor with a <a href="visuren.html#propdef-position" class="noxref"><span
class="propinst-position">'position'</span></a> <del>other</del> <del>than</del> <del>'static',</del><ins>of</ins> <ins>'absolute',</ins> <ins>'relative'</ins>
<ins>or</ins> <ins>'fixed',</ins> in the following way:
<ol>
<li>In the case that the ancestor is <del>block-level,</del> <del>the</del> <del>containing</del> <del>block</del> <del>is</del> <del>formed</del> <del>by</del> <del>the</del> <del>padding</del> <del>edge</del> <del>of</del> <del>the</del> <del>ancestor.</del> <del>In</del> <del>the</del> <del>case</del> <del>that</del> <del>the</del> <del>ancestor</del> <del>is</del>inline-level, the containing
block depends on the <a href="visuren.html#propdef-direction" class="noxref"><span
class="propinst-direction">'direction'</span></a> property of the
ancestor:
<ol>
<li>If the <a href="visuren.html#propdef-direction" class="noxref"><span class="propinst-direction">'direction'</span></a> is 'ltr', the top and left of the containing
block are the top and left <del>content</del><ins>padding</ins> edges of the first box generated by
the ancestor, and the bottom and right are the bottom and right
<del>content</del><ins>padding</ins> edges of the last box of the ancestor.
</li>
<li>If the <a href="visuren.html#propdef-direction" class="noxref"><span class="propinst-direction">'direction'</span></a> is 'rtl', the top and right are the top and
right <ins>padding</ins> edges of the first box generated by the
ancestor, and the bottom and left
are the bottom and left <del>content</del><ins>padding</ins> edges of the last box of the ancestor.
</li>
</ol>
<p class=note><ins>Note:</ins> <ins>This</ins> <ins>may</ins> <ins>cause</ins> <ins>the</ins> <ins>containing</ins> <ins>block's</ins> <ins>width</ins> <ins>to</ins> <ins>be</ins>
<ins>negative.</ins></p>
</li>
<li><ins>Otherwise,</ins> <ins>the</ins> <ins>containing</ins> <ins>block</ins>
<ins>is</ins> <ins>formed</ins> <ins>by</ins> <ins>the</ins> <a href="box.html#padding-edge"><ins>padding</ins> <ins>edge</ins></a> <ins>of</ins>
<ins>the</ins> <ins>ancestor.</ins>
</li>
</ol>
<p>If there is no such ancestor, the <del>content</del> <del>edge</del> <del>of</del> <del>the</del> <del>root</del> <del>element's</del> <del>box</del> <del>establishes</del> <del>the</del>containing <del>block.</del> <del>Example(s):</del> <del>With</del> <del>no</del> <del>positioning,</del><ins>block</ins> <ins>is</ins> the <ins>initial</ins>
containing <del>blocks</del> <del>(C.B.)</del><ins>block.</ins>
</p>
</li>
</ol>
<p>In <del>the</del> <del>following</del> <del>document:</del> <del><HTML></del> <del><HEAD></del> <del><TITLE>Illustration</del> <del>of</del> <del>containing</del> <del>blocks</TITLE></del> <del></HEAD></del> <del><BODY</del> <del>id="body"></del> <del><DIV</del> <del>id="div1"></del> <del><P</del> <del>id="p1">This</del><ins>paged</ins> <ins>media,</ins> <ins>an</ins> <ins>absolutely</ins> <ins>positioned</ins> <ins>element</ins> is <del>text</del> <del>in</del><ins>positioned</ins>
<ins>relative</ins> <ins>to</ins> <ins>its</ins> <ins>containing</ins> <ins>block</ins> <ins>ignoring</ins> <ins>any</ins> <ins>page</ins> <ins>breaks</ins> <ins>(as</ins> <ins>if</ins> the
<del>first</del> <del>paragraph...</P></del> <del><P</del> <del>id="p2">This</del> <del>is</del> <del>text</del> <del><EM</del> <del>id="em1"></del> <del>in</del><ins>document</ins> <ins>were</ins> <ins>continuous).</ins> The <del><STRONG</del> <del>id="strong1">second</STRONG></del> <del>paragraph.</EM></P></del> <del></DIV></del> <del></BODY></del> <del></HTML></del> <del>are</del> <del>established</del> <del>as</del> <del>follows:</del><ins>element</ins> <ins>may</ins> <ins>subsequently</ins> <ins>be</ins> <ins>broken</ins> <ins>over</ins>
<ins>several</ins> <ins>pages.</ins>
</p>
<p>For <del>box</del> <del>generated</del> <del>by</del> <del>C.B.</del> <del>is</del> <del>established</del> <del>by</del> <del>body</del> <del>initial</del><ins>absolutely</ins> <ins>positioned</ins> <ins>content</ins> <ins>that</ins> <ins>resolves</ins> <ins>to</ins> <ins>a</ins> <ins>position</ins> <ins>on</ins> <ins>a</ins>
<ins>page</ins> <ins>other</ins> <ins>than</ins> <ins>the</ins> <ins>page</ins> <ins>being</ins> <ins>laid</ins> <ins>out</ins> <ins>(the</ins> <ins>current</ins> <ins>page),</ins> <ins>or</ins>
<ins>resolves</ins> <ins>to</ins> <ins>a</ins> <ins>position</ins> <ins>on</ins> <ins>the</ins> <ins>current</ins> <ins>page</ins> <ins>which</ins> <ins>has</ins> <ins>already</ins> <ins>been</ins>
<ins>rendered</ins> <ins>for</ins> <ins>printing,</ins> <ins>printers</ins> <ins>may</ins> <ins>place</ins> <ins>the</ins> <ins>content</ins>
<ul>
<li><ins>on</ins> <ins>another</ins> <ins>location</ins> <ins>on</ins> <ins>the</ins> <ins>current</ins> <ins>page,</ins>
<li><ins>on</ins> <ins>a</ins> <ins>subsequent</ins> <ins>page,</ins> <ins>or</ins>
<li><ins>may</ins> <ins>omit</ins> <ins>it.</ins>
</ul>
<p class="note"><ins>Note</ins> <ins>that</ins> <ins>a</ins>
<ins>block-level</ins> <ins>element</ins> <ins>that</ins> <ins>is</ins> <ins>split</ins> <ins>over</ins> <ins>several</ins> <ins>pages</ins> <ins>may</ins> <ins>have</ins> <ins>a</ins> <ins>different</ins>
<ins>width</ins> <ins>on</ins> <ins>each</ins> <ins>page</ins> <ins>and</ins> <ins>that</ins> <ins>there</ins> <ins>may</ins> <ins>be</ins> <ins>device-specific</ins> <ins>limits.</ins>
</p>
<div class="example"><P style="display:none"><ins>Example(s):</ins></P>
<p><ins>With</ins> <ins>no</ins> <ins>positioning,</ins> <ins>the</ins> <ins>containing</ins> <ins>blocks</ins> <ins>(C.B.)</ins> <ins>in</ins> <ins>the</ins>
<ins>following</ins> <ins>document:</ins></p>
<pre class="html-example">
<ins><!DOCTYPE</ins> <ins>HTML</ins> <ins>PUBLIC</ins> <ins>"-//W3C//DTD</ins> <ins>HTML</ins> <ins>4.01//EN"></ins>
<ins><HTML></ins>
<ins><HEAD></ins>
<ins><TITLE>Illustration</ins> <ins>of</ins> <ins>containing</ins> <ins>blocks</TITLE></ins>
<ins></HEAD></ins>
<ins><BODY</ins> <ins>id="body"></ins>
<ins><DIV</ins> <ins>id="div1"></ins>
<ins><P</ins> <ins>id="p1">This</ins> <ins>is</ins> <ins>text</ins> <ins>in</ins> <ins>the</ins> <ins>first</ins> <ins>paragraph...</P></ins>
<ins><P</ins> <ins>id="p2">This</ins> <ins>is</ins> <ins>text</ins> <ins><EM</ins> <ins>id="em1"></ins> <ins>in</ins> <ins>the</ins>
<ins><STRONG</ins> <ins>id="strong1">second</STRONG></ins> <ins>paragraph.</EM></P></ins>
<ins></DIV></ins>
<ins></BODY></ins>
<ins></HTML></ins>
</pre>
<p><ins>are</ins> <ins>established</ins> <ins>as</ins> <ins>follows:</ins></p>
<table border="1">
<tr><th><ins>For</ins> <ins>box</ins> <ins>generated</ins> <ins>by</ins> </th>
<td><strong><ins>C.B.</ins> <ins>is</ins> <ins>established</ins> <ins>by</ins></strong></td></tr>
<tr><td><ins>html</ins></td><td><ins>initial</ins> C.B. (UA-dependent)</td></tr>
<tr><td><ins>body</ins></td><td><ins>html</ins></td></tr>
<tr><td>div1</td><td>body</td></tr>
<tr><td>p1</td><td>div1</td></tr>
<tr><td>p2</td><td>div1</td></tr>
<tr><td>em1</td><td>p2</td></tr>
<tr><td>strong1</td><td>p2</td></tr>
</table>
<p>If we position "div1":</p>
<pre class="example">
#div1 { position: absolute; left: 50px; top: 50px }
</pre>
<p>its containing block is no longer "body"; it becomes
the initial containing block (since there are no
other positioned ancestor boxes).
</p>
<p>If we position "em1" as well:</p>
<pre class="example">
#div1 { position: absolute; left: 50px; top: 50px }
#em1 { position: absolute; left: 100px; top: 100px }
</pre>
<p>the table of containing blocks becomes:</p>
<table border="1">
<tr><th>For box generated by</th>
<td><strong>C.B. is established by</strong></td></tr>
<tr><td> <del>body</del><ins>html</ins></td><td>initial C.B. <ins>(UA-dependent)</ins></td></tr>
<tr><td><ins>body</ins></td><td><ins>html</ins></td></tr>
<tr><td>div1</td><td>initial C.B.</td></tr>
<tr><td>p1</td><td>div1</td></tr>
<tr><td>p2</td><td>div1</td></tr>
<tr><td>em1</td><td>div1</td></tr>
<tr><td>strong1</td><td>em1</td></tr>
</table>
<p>By positioning "em1", its containing block becomes
the nearest positioned ancestor box (i.e., that generated
by "div1").
</p>
</div>
<h2>10.2 <a name="the-width-property">Content width</a>: the <a href="visudet.html#propdef-width" class="noxref"><span
class="propinst-width">'width'</span></a> property</h2>
<div class="propdef">
<dl><dt>
<span class="index-def" title="'width'"><a name="propdef-width" class="propdef-title"><strong>'width'</strong></a></span>
<dd>
<table class="propinfo" cellspacing=0 cellpadding=0>
<tr valign=baseline><td><em>Value:</em> <td><a href="syndata.html#value-def-length" class="noxref"><span class="value-inst-length"><length></span></a> | <a href="syndata.html#value-def-percentage" class="noxref"><span class="value-inst-percentage"><percentage></span></a> | auto | <a href="cascade.html#value-def-inherit" class="noxref"><span class="value-inst-inherit">inherit</span></a>
<tr valign=baseline><td><em>Initial:</em> <td>auto
<tr valign=baseline><td><em>Applies to:</em> <td>all elements but non-replaced inline elements, table rows, and row groups
<tr valign=baseline><td><em>Inherited:</em> <td>no
<tr valign=baseline><td><em>Percentages:</em> <td>refer to width of containing block
<tr valign=baseline><td><em>Media:</em> <td><a href="media.html#visual-media-group" class="noxref">visual</a>
<tr valign=baseline><td><em><ins>Computed value:</ins></em><ins> </ins><td><ins>the</ins> <ins>percentage</ins> <ins>or</ins> <ins>'auto'</ins> <ins>as</ins> <ins>specified</ins> <ins>or</ins> <ins>the</ins> <ins>absolute</ins> <ins>length;</ins> <ins>'auto'</ins> <ins>if</ins> <ins>the</ins> <ins>property</ins> <ins>does</ins> <ins>not</ins> <ins>apply</ins>
</table>
</dl>
</div>
<p> This property specifies the <a
href="box.html#content-width">content width</a> of boxes generated by
block-level and <a href="conform.html#replaced-element">replaced</a> elements.
</p>
<p>This property does not apply to non-replaced <a
href="visuren.html#inline-level">inline-level</a> elements. The
<ins>content</ins> width
of a non-replaced inline element's boxes is that of the rendered
content within them (<em>before</em> any relative offset of
children). Recall that inline boxes flow into <a
href="visuren.html#line-box">line boxes</a>. The width of line boxes
is given by the their <a
href="visuren.html#containing-block">containing block</a>, but may be
shorted by the presence of <a href="visuren.html#floats">floats</a>.
</p>
<p>The width of a replaced element's box is <a
href="conform.html#intrinsic">intrinsic</a> and may be scaled by the
user agent if the value of this property is different than 'auto'.
</p>
<p>Values have the following meanings:</p>
<dl>
<dt><span class="index-inst" title="<length>"><a name="x4" href="syndata.html#value-def-length" class="noxref"><span class="value-inst-length"><strong><length></strong></span></a></span>
</dt>
<dd>Specifies <ins>the</ins> <ins>width</ins> <ins>of</ins> <ins>the</ins> <ins>content</ins> <ins>area</ins> <ins>using</ins> a <del>fixed</del> <del>width.</del><ins>length</ins> <ins>unit.</ins>
</dd>
<dt><span class="index-inst" title="<percentage>"><a name="x5" href="syndata.html#value-def-percentage" class="noxref"><span class="value-inst-percentage"><strong><percentage></strong></span></a></span>
</dt>
<dd>Specifies a percentage width. The percentage is calculated
with respect to the width of the generated box's
<a href="visuren.html#containing-block">containing block</a>.
<ins>If</ins> <ins>the</ins> <ins>containing</ins> <ins>
EDE6
block's</ins> <ins>width</ins> <ins>depends</ins> <ins>on</ins> <ins>this</ins> <ins>element's</ins> <ins>width,</ins> <ins>then</ins>
<ins>the</ins> <ins>resulting</ins> <ins>layout</ins> <ins>is</ins> <ins>undefined</ins> <ins>in</ins> <ins>CSS</ins> <ins>2.1.</ins>
<span class="note">
<ins>Note:</ins> <ins>For</ins> <ins>absolutely</ins> <ins>positioned</ins> <ins>elements</ins> <ins>whose</ins> <ins>containing</ins> <ins>block</ins> <ins>is</ins>
<ins>based</ins> <ins>on</ins> <ins>a</ins> <ins>block-level</ins> <ins>element,</ins> <ins>the</ins> <ins>percentage</ins> <ins>is</ins> <ins>calculated</ins> <ins>with</ins>
<ins>respect</ins> <ins>to</ins> <ins>the</ins> <ins>width</ins> <ins>of</ins> <ins>the</ins> <em><ins>padding</ins> <ins>box</ins></em> <ins>of</ins> <ins>that</ins> <ins>element.</ins>
<ins>This</ins> <ins>is</ins> <ins>a</ins> <ins>change</ins> <ins>from</ins> <ins>CSS1,</ins> <ins>where</ins> <ins>the</ins> <ins>percentage</ins> <ins>width</ins> <ins>was</ins> <ins>always</ins>
<ins>calculated</ins> <ins>with</ins> <ins>respect</ins> <ins>to</ins> <ins>the</ins> <em><ins>content</ins> <ins>box</ins></em> <ins>of</ins> <ins>the</ins> <ins>parent</ins>
<ins>element.</ins>
</span>
</dd>
<dt><strong>auto</strong>
</dt>
<dd>The width depends on the values of other properties.
See the sections below.
</dd>
</dl>
<p>Negative values for <a href="visudet.html#propdef-width" class="noxref"><span class="propinst-width">'width'</span></a> are
illegal.
</p>
<div class="example"><P style="display:none">Example(s):</P><p>
For example, the following rule fixes the content width of paragraphs
at 100 pixels:</p>
<pre>
p { width: 100px }
</pre>
</div>
<h2>10.3 <a name="Computing_widths_and_margins"> <del>Computing</del><ins>Calculating</ins> widths and
margins</a></h2>
<p>The <del>computed</del>values of an element's <a href="visudet.html#propdef-width" class="noxref"><span
class="propinst-width">'width'</span></a>, <a href="box.html#propdef-margin-left" class="noxref"><span
class="propinst-margin-left">'margin-left'</span></a>, <a href="box.html#propdef-margin-right" class="noxref"><span
class="propinst-margin-right">'margin-right'</span></a>, <a href="visuren.html#propdef-left" class="noxref"><span
class="propinst-left">'left'</span></a> and <a href="visuren.html#propdef-right" class="noxref"><span
class="propinst-right">'right'</span></a> properties <ins>as</ins> <ins>used</ins> <ins>for</ins> <ins>layout</ins>
depend on the type of box generated and on each other. <ins>(The</ins> <ins>value</ins> <ins>used</ins>
<ins>for</ins> <ins>layout</ins> <ins>is</ins> <ins>sometimes</ins> <ins>referred</ins> <ins>to</ins> <ins>as</ins> <ins>the</ins> <a
href="cascade.html#usedValue"><ins>used</ins> <ins>value</ins></a><ins>.)</ins> In
principle, the <del>computed</del>values <ins>used</ins> are the same as the <del>specified</del><ins>computed</ins> values, with
'auto' replaced by some suitable value, <ins>and</ins> <ins>percentages</ins> <ins>calculated</ins>
<ins>based</ins> <ins>on</ins> <ins>the</ins> <ins>containing</ins> <ins>block,</ins> but there are exceptions. The following
situations need to be distinguished:</p>
<ol>
<li>inline, non-replaced elements</li>
<li>inline, replaced elements</li>
<li>block-level, non-replaced elements in normal flow</li>
<li>block-level, replaced elements in normal flow</li>
<li>floating, non-replaced elements</li>
<li>floating, replaced elements</li>
<li>absolutely positioned, non-replaced elements</li>
<li>absolutely positioned, replaced elements</li>
<li><ins>'inline-block',</ins> <ins>non-replaced</ins> <ins>elements</ins> <ins>in</ins> <ins>normal</ins> <ins>flow</ins></li>
<li><ins>'inline-block',</ins> <ins>replaced</ins> <ins>elements</ins> <ins>in</ins> <ins>normal</ins> <ins>flow</ins></li>
</ol>
<p><ins>For</ins> Points 1-6 <del>include</del> <del>relative</del> <del>positioning.</del><ins>and</ins> <ins>9-10,</ins> <ins>the</ins> <ins>values</ins> <ins>of</ins> <ins>'left'</ins> <ins>and</ins> <ins>'right'</ins> <ins>used</ins> <ins>for</ins>
<ins>layout</ins> <ins>are</ins> <ins>determined</ins> <ins>by</ins> <ins>the</ins> <ins>rules</ins> <ins>in</ins> <a
href="visuren.html#relative-positioning"><ins>section</ins> <ins>9.4.3.</ins></a>
</p>
<h3><a name="q4">10.3.1 Inline, non-replaced elements</a></h3>
<p>The <a href="visudet.html#propdef-width" class="noxref"><span class="propinst-width">'width'</span></a> property does not
apply. A <del>specified</del><ins>computed</ins> value of 'auto' for <a href="visuren.html#propdef-left" class="noxref"><span
class="propinst-left">'left'</span></a>, <a href="visuren.html#propdef-right" class="noxref"><span
class="propinst-right">'right'</span></a>, <a href="box.html#propdef-margin-left" class="noxref"><span
class="propinst-margin-left">'margin-left'</span></a> or <a href="box.html#propdef-margin-right" class="noxref"><span
class="propinst-margin-right">'margin-right'</span></a> becomes a <del>computed</del><ins>used</ins>
value of '0'.
</p>
<h3>10.3.2 <a name="inline-replaced-width">Inline, replaced elements</a></h3>
<p>A <del>specified</del><ins>computed</ins> value of 'auto' for <a href="box.html#propdef-margin-left" class="noxref"><span
class="propinst-margin-left"> <del>'left'</del> <del>,</del> <del>'right'</del> <del>,</del>'margin-left'</span></a> or <a href="box.html#propdef-margin-right" class="noxref"><span
class="propinst-margin-right">'margin-right'</span></a> becomes a <del>computed</del><ins>used</ins>
value of '0'.
<p><ins>If</ins> <a href="visudet.html#propdef-height" class="noxref"><span class="propinst-height"><ins>'height'</ins></span></a> <ins>and</ins> <a href="visudet.html#propdef-width" class="noxref"><span
class="propinst-width"><ins>'width'</ins></span></a> <ins>both</ins> <ins>have</ins> <ins>computed</ins> <ins>values</ins> <ins>of</ins>
<ins>'auto'</ins> <ins>and</ins> <ins>the</ins> <ins>element</ins> <ins>also</ins> <ins>has</ins> <ins>an</ins> <ins>intrinsic</ins> <ins>width,</ins> <ins>then</ins> <ins>that</ins>
<ins>intrinsic</ins> <ins>width</ins> <ins>is</ins> <ins>the</ins> <ins>used</ins> <ins>value</ins> <ins>of</ins> <a href="visudet.html#propdef-width" class="noxref"><span
class="propinst-width"><ins>'width'</ins></span></a><ins>.</ins>
<p><ins>If</ins> <a href="visudet.html#propdef-height" class="noxref"><span class="propinst-height"><ins>'height'</ins></span></a> <ins>and</ins> <a href="visudet.html#propdef-width" class="noxref"><span
class="propinst-width"><ins>'width'</ins></span></a> <ins>both</ins> <ins>have</ins> <ins>computed</ins> <ins>values</ins> <ins>of</ins>
<ins>'auto'</ins> <ins>and</ins> <ins>the</ins> <ins>element</ins> <ins>has</ins> <ins>no</ins> <ins>intrinsic</ins> <ins>width,</ins> <ins>but</ins> <ins>does</ins> <ins>have</ins> <ins>an</ins>
<ins>intrinsic</ins> <ins>height</ins> <ins>and</ins> <ins>intrinsic</ins> <ins>ratio;</ins> <ins>or</ins> <ins>if</ins> <a href="visudet.html#propdef-width" class="noxref"><span
class="propinst-width"><ins>'width'</ins></span></a> <ins>has</ins> a <del>specified</del><ins>computed</ins> <ins>value</ins> <ins>of</ins> <ins>'auto',</ins>
<a href="visudet.html#propdef-height" class="noxref"><span class="propinst-height"><ins>'height'</ins></span></a> <ins>has</ins> <ins>some</ins> <ins>other</ins> <ins>computed</ins>
<ins>value,</ins> <ins>and</ins> <ins>the</ins> <ins>element</ins> <ins>does</ins> <ins>have</ins> <ins>an</ins> <ins>intrinsic</ins> <ins>ratio;</ins> <ins>then</ins> <ins>the</ins> <ins>used</ins>
value of <a href="visudet.html#propdef-width" class="noxref"><span class="propinst-width"><ins>'width'</ins></span></a> <ins>is:</ins>
<blockquote><p><ins>(used</ins> <ins>height)</ins> <ins>*</ins> <ins>(intrinsic</ins> <ins>ratio)</ins></blockquote>
<p><ins>If</ins> <ins>'height'</ins> <ins>and</ins> <a href="visudet.html#propdef-width" class="noxref"><span class="propinst-width"><ins>'width'</ins></span></a> <ins>both</ins>
<ins>have</ins> <ins>computed</ins> <ins>values</ins> <ins>of</ins> 'auto' <ins>and</ins> <ins>the</ins> <ins>element</ins> <ins>has</ins> <ins>an</ins> <ins>intrinsic</ins> <ins>ratio</ins>
<ins>but</ins> <ins>no</ins> <ins>intrinsic</ins> <ins>height</ins> <ins>or</ins> <ins>width</ins> <ins>and</ins> <ins>the</ins> <ins>containing</ins> <ins>block's</ins> <ins>width</ins>
<ins>doesn't</ins> <ins>itself</ins> <ins>depend</ins> <ins>on</ins> <ins>the</ins> <ins>replaced</ins> <ins>element's</ins> <ins>width,</ins> <ins>then</ins> <ins>the</ins> <ins>used</ins>
<ins>value</ins> <ins>of</ins> <ins>'width'</ins> <ins>is</ins> <ins>calculated</ins> <ins>from</ins> <ins>the</ins> <ins>constraint</ins> <ins>equation</ins> <ins>used</ins> for
<ins>block-level,</ins> <ins>non-replaced</ins> <ins>elements</ins> <ins>in</ins> <ins>normal</ins> <ins>flow.</ins>
<p><ins>Otherwise,</ins> <ins>if</ins> <a href="visudet.html#propdef-width" class="noxref"><span class="propinst-width"><ins>'width'</ins></span></a> <ins>has</ins> <ins>a</ins>
<ins>computed</ins> <ins>value</ins> <ins>of</ins> <ins>'auto',</ins> <ins>but</ins> <ins>none</ins> <ins>of</ins> <ins>the</ins> <ins>conditions</ins> <ins>above</ins> <ins>are</ins> <ins>met,</ins>
<ins>then</ins> <ins>the</ins> <ins>used</ins> <ins>value</ins> <ins>of</ins> <a href="visudet.html#propdef-width" class="noxref"><span class="propinst-width">'width'</span></a>
<del>gives</del><ins>becomes</ins> <ins>300px.</ins> <ins>If</ins> <ins>300px</ins> <ins>is</ins> <ins>too</ins> <ins>wide</ins> <ins>to</ins> <ins>fit</ins> <ins>the</ins> <ins>device,</ins> <ins>UAs</ins> <ins>should</ins> <ins>use</ins>
<ins>the</ins> <ins>width</ins> <ins>of</ins> <ins>the</ins> <ins>largest</ins> <ins>rectangle</ins> <ins>that</ins> <ins>has</ins> <ins>a</ins> <ins>2:1</ins> <ins>ratio</ins> <ins>and</ins> <ins>fits</ins> <ins>the</ins>
<ins>device</ins> <ins>instead.</ins>
<p><ins>Percentage</ins> <ins>intrinsic</ins> <ins>widths</ins> <ins>are</ins> <ins>first</ins> <ins>evaluated</ins> <ins>with</ins> <ins>respect</ins> <ins>to</ins> <ins>the</ins>
<ins>containing</ins> <ins>block's</ins> <ins>width,</ins> <ins>if</ins> <ins>that</ins> <ins>width</ins> <ins>doesn't</ins> <ins>itself</ins> <ins>depend</ins> <ins>on</ins> the
<ins>replaced</ins> element's <ins>width.</ins> <ins>If</ins> <ins>it</ins> <ins>does,</ins> <ins>then</ins> <ins>a</ins> <ins>percentage</ins> intrinsic
width <del>as</del><ins>on</ins> <ins>that</ins> <ins>element</ins> <ins>can't</ins> <ins>be</ins> <ins>resolved</ins> <ins>and</ins> the <del>computed</del> <del>value.</del><ins>element</ins> <ins>is</ins> <ins>assumed</ins> <ins>to</ins>
<ins>have</ins> <ins>no</ins> <ins>intrinsic</ins> <ins>width.</ins>
<h3>10.3.3 <a name="blockwidth">Block-level, non-replaced elements in normal
flow</a></h3>
<p> <del>If</del> <del>'left'</del> <del>or</del> <del>'right'</del> <del>are</del> <del>given</del> <del>as</del> <del>'auto',</del> <del>their</del> <del>computed</del> <del>value</del> <del>is</del> <del>0.</del>The following <a name="width-constraints">constraints</a> must hold
<del>between</del><ins>among</ins> <ins>the</ins> <ins>used</ins> <ins>values</ins> <ins>of</ins> the other properties:</p>
<blockquote>
<p><a href="box.html#propdef-margin-left" class="noxref"><span class="propinst-margin-left">'margin-left'</span></a> + <a href="box.html#propdef-border-left-width" class="noxref"><span
class="propinst-border-left-width">'border-left-width'</span></a> + <a href="box.html#propdef-padding-left" class="noxref"><span
class="propinst-padding-left">'padding-left'</span></a> + <a href="visudet.html#propdef-width" class="noxref"><span
class="propinst-width">'width'</span></a> + <a href="box.html#propdef-padding-right" class="noxref"><span
class="propinst-padding-right">'padding-right'</span></a> + <a href="box.html#propdef-border-right-width" class="noxref"><span
class="propinst-border-right-width">'border-right-width'</span></a> +
<a href="box.html#propdef-margin-right" class="noxref"><span class="propinst-margin-right">'margin-right'</span></a> <ins>+</ins> <ins>scrollbar</ins>
<ins>width</ins> <ins>(if</ins> <ins>any)</ins> = width of <a
href="#containing-block-details">containing block</a>
</p>
</blockquote>
<p> <del>(If</del> <del>the</del> <del>border</del> <del>style</del> <del>is</del> <del>'none',</del> <del>use</del> <del>'0'</del> <del>as</del> <del>the</del> <del>border</del> <del>width.)</del>If <del>all</del> <del>of</del> <del>the</del> <del>above</del> <del>have</del> <del>a</del> <del>specified</del> <del>value</del> <del>other</del> <del>than</del><ins>'width'</ins> <ins>is</ins> <ins>not</ins> <ins>'auto'</ins> <ins>and</ins> <ins>'border-left-width'</ins> <ins>+</ins> <ins>'padding-left'</ins> <ins>+</ins>
<ins>'width'</ins> <ins>+</ins> <ins>'padding-right'</ins> <ins>+</ins> <ins>'border-right-width'</ins> <ins>+</ins> <ins>scrollbar</ins>
<ins>width</ins> <ins>(if</ins> <ins>any)</ins> <ins>(plus</ins> <ins>any</ins> <ins>of</ins>
<ins>'margin-left'</ins> <ins>or</ins> <ins>'margin-right'</ins> <ins>that</ins> <ins>are</ins> <ins>not</ins> <ins>'auto')</ins> <ins>is</ins> <ins>larger</ins> <ins>than</ins>
<ins>the</ins> <ins>width</ins> <ins>of</ins> <ins>the</ins> <ins>containing</ins> <ins>block,</ins> <ins>then</ins> <ins>any</ins> <ins>'auto'</ins> <ins>values</ins> <ins>for</ins>
<ins>'margin-left'</ins> <ins>or</ins> <ins>'margin-right'</ins> <ins>are,</ins> <ins>for</ins> <ins>the</ins> <ins>following</ins> <ins>rules,</ins> <ins>treated</ins>
<ins>as</ins> <ins>zero.</ins>
</p>
<p><ins>If</ins>
<ins>all</ins> <ins>of</ins> <ins>the</ins> <ins>above</ins> <ins>have</ins> <ins>a</ins> <ins>computed</ins> <ins>value</ins> <ins>other</ins> <ins>than</ins> 'auto', the values
are said to be "over-constrained" and one of the <del>computed</del><ins>used</ins> values will
have to be different from its <del>specified</del><ins>computed</ins> value. If the <a href="visuren.html#propdef-direction" class="noxref"><span
class="propinst-direction">'direction'</span></a>
property <ins>of</ins> <ins>the</ins> <ins>containing</ins> <ins>block</ins> has the value 'ltr', the specified
value of <a href="box.html#propdef-margin-right" class="noxref"><span
class="propinst-margin-right">'margin-right'</span></a> is ignored and the
value is <del>computed</del><ins>calculated</ins> so as to make the equality true. If the value of
<a href="visuren.html#propdef-direction" class="noxref"><span class="propinst-direction">'direction'</span></a> is <del>'ltr',</del><ins>'rtl',</ins> this
happens to <a href="box.html#propdef-margin-left" class="noxref"><span class="propinst-margin-left">'margin-left'</span></a> instead.
</p>
<p>If there is exactly one value specified as 'auto', its <del>computed</del><ins>used</ins>
value follows from the equality.
</p>
<p>If <a href="visudet.html#propdef-width" class="noxref"><span class="propinst-width">'width'</span></a> is set to 'auto',
any other 'auto' values become '0' and <a href="visudet.html#propdef-width" class="noxref"><span
class="propinst-width">'widt
1DDA
h'</span></a> follows from the resulting
equality.
</p>
<p>If both <a href="box.html#propdef-margin-left" class="noxref"><span class="propinst-margin-left">'margin-left'</span></a> and
<a href="box.html#propdef-margin-right" class="noxref"><span class="propinst-margin-right">'margin-right'</span></a> are 'auto',
their <del>computed</del><ins>used</ins> values are equal. <ins>This</ins> <ins>horizontally</ins> <ins>centers</ins> <ins>the</ins> <ins>element</ins>
<ins>with</ins> <ins>respect</ins> <ins>to</ins> <ins>the</ins> <ins>edges</ins> <ins>of</ins> <ins>the</ins> <ins>containing</ins> <ins>block.</ins>
</p>
<p><ins>The</ins> <ins>"scrollbar</ins> <ins>width"</ins> <ins>value</ins> <ins>is</ins> <ins>only</ins> <ins>relevant</ins> <ins>if</ins> <ins>the</ins> <ins>user</ins> <ins>agent</ins> <ins>uses</ins>
<ins>a</ins> <ins>scrollbar</ins> <ins>as</ins> <ins>its</ins> <ins>scrolling</ins> <ins>mechanism.</ins> <ins>See</ins> <ins>the</ins> <ins>definition</ins> <ins>of</ins> <ins>the</ins>
<a href="visufx.html#propdef-overflow" class="noxref"><span class="propinst-overflow"><ins>'overflow'</ins></span></a> <ins>property.</ins>
</p>
<h3><a name="q7">10.3.4 Block-level, replaced elements in normal flow</a></h3>
<p> <del>If</del> <del>'left'</del> <del>or</del> <del>'right'</del> <del>are</del> <del>'auto',</del> <del>their</del> <del>computed</del><ins>The</ins> <ins>used</ins> value <del>is</del> <del>0.</del> <del>If</del><ins>of</ins>
<a href="visudet.html#propdef-width" class="noxref"><span class="propinst-width">'width'</span></a> is <del>specified</del><ins>determined</ins>
as <del>'auto',</del> <del>its</del> <del>value</del> <del>is</del> <del>the</del> <del>element's</del> <del>intrinsic</del> <del>width.</del> <del>If</del> <del>one</del> <del>of</del> <del>the</del> <del>margins</del> <del>is</del> <del>'auto',</del> <del>its</del> <del>computed</del> <del>value</del> <del>is</del> <del>given</del> <del>by</del><ins>for</ins> <a href="#inline-replaced-width"><ins>inline</ins> <ins>replaced</ins>
<ins>elements</ins></a><ins>.</ins>
<ins>Then</ins> the <del>constraints</del> <del>above.</del> <del>Furthermore,</del> <del>if</del> <del>both</del> <del>margins</del> <del>are</del> <del>'auto',</del> <del>their</del> <del>computed</del> <del>values</del><ins>rules</ins> <a href="#blockwidth"><ins>for</ins> <ins>non-replaced</ins>
<ins>block-level</ins> <ins>elements</ins></a> are <del>equal.</del><ins>applied</ins> <ins>to</ins> <ins>determine</ins> <ins>the</ins> <ins>margins.</ins>
</p>
<h3><a name="q8">10.3.5 Floating, non-replaced elements</a></h3>
<p>If <a href="box.html#propdef-margin-left" class="noxref"><span
class="propinst-margin-left"> <del>'left'</del> <del>,</del> <del>'right'</del> <del>,</del> <del>'width'</del> <del>,</del>'margin-left'</span></a>, or <a href="box.html#propdef-margin-right" class="noxref"><span
class="propinst-margin-right">'margin-right'</span></a> are <del>specified</del> <del>as</del> <del>'auto',</del> <del>their</del>computed <del>value</del> <del>is</del> <del>'0'.</del> <del>10.3.6</del> <del>Floating,</del> <del>replaced</del> <del>elements</del> <del>If</del> <del>'left'</del> <del>,</del> <del>'right'</del> <del>,</del> <del>'margin-left'</del> <del>or</del> <del>'margin-right'</del> <del>are</del> <del>specified</del>as
'auto', their <del>computed</del><ins>used</ins> value is '0'.
</p>
<p>If <a href="visudet.html#propdef-width" class="noxref"><span class="propinst-width">'width'</span></a> is <ins>computed</ins> <ins>as</ins>
'auto', <del>its</del><ins>the</ins> <ins>used</ins> value is the <del>element's</del> <del>intrinsic</del><ins>"shrink-to-fit"</ins> width.
</p>
<p><a name="shrink-to-fit-float"></a> <del>10.3.7</del> <del>Absolutely</del> <del>positioned,</del> <del>non-replaced</del> <del>elements</del><ins>Calculation</ins> <ins>of</ins> the <del>constraint</del> <del>that</del> <del>determines</del><ins>shrink-to-fit</ins>
<ins>width</ins> <ins>is</ins> <ins>similar</ins> <ins>to</ins> <ins>calculating</ins> the <del>computed</del> <del>values</del> <del>for</del> <del>these</del> <del>elements</del> <del>is:</del> <del>'left'</del> <del>+</del> <del>'margin-left'</del> <del>+</del> <del>'border-left-width'</del> <del>+</del> <del>'padding-left'</del> <del>+</del> <del>'width'</del> <del>+</del> <del>'padding-right'</del> <del>+</del> <del>'border-right-width'</del> <del>+</del> <del>'margin-right'</del> <del>+</del> <del>'right'</del> <del>=</del>width of <del>containing</del> <del>block</del> <del>(If</del><ins>a</ins> <ins>table</ins> <ins>cell</ins> <ins>using</ins> the
<del>border</del> <del>style</del> <del>is</del> <del>'none',</del> <del>use</del> <del>'0'</del> <del>as</del><ins>automatic</ins> <ins>table</ins> <ins>layout</ins> <ins>algorithm.</ins> <ins>Roughly:</ins> <ins>calculate</ins> the <del>border</del> <del>width.)</del><ins>preferred</ins>
<ins>width</ins> <ins>by</ins> <ins>formatting</ins> the <del>solution</del> <del>to</del> <del>this</del> <del>constraint</del><ins>content</ins> <ins>without</ins> <ins>breaking</ins> <ins>lines</ins> <ins>other</ins> <ins>than</ins>
<ins>where</ins> <ins>explicit</ins> <ins>line</ins> <ins>breaks</ins> <ins>occur,</ins> <ins>and</ins> <ins>also</ins> <ins>calculate</ins> <ins>the</ins> <ins>preferred</ins>
<em><ins>minimum</ins></em> <ins>width,</ins> <ins>e.g.,</ins> <ins>by</ins> <ins>trying</ins> <ins>all</ins> <ins>possible</ins> <ins>line</ins> <ins>breaks.</ins>
<ins>CSS 2.1</ins> <ins>does</ins> <ins>not</ins> <ins>define</ins> <ins>the</ins> <ins>exact</ins> <ins>algorithm.</ins> <ins>Thirdly,</ins> <ins>find</ins> <ins>the</ins>
<em><ins>available</ins> <ins>width</ins></em><ins>:</ins> <ins>in</ins> <ins>this</ins> <ins>case,</ins> <ins>this</ins> is <del>reached</del> <del>through</del> <del>a</del> <del>number</del><ins>the</ins> <ins>width</ins> of <del>substitutions</del> <del>in</del>the
<del>following</del> <del>order:</del><ins>containing</ins> <ins>block</ins> <ins>minus</ins> <ins>the</ins> <ins>used</ins> <ins>values</ins> <ins>of</ins> <ins>'margin-left',</ins>
<ins>'border-left-width',</ins> <ins>'padding-left',</ins> <ins>'padding-right',</ins>
<ins>'border-right-width',</ins> <ins>'margin-right',</ins> <ins>and</ins> <ins>the</ins> <ins>widths</ins> <ins>of</ins> <ins>any</ins> <ins>relevant</ins>
<ins>scroll</ins> <ins>bars.</ins>
</p>
<p><ins>Then</ins> <ins>the</ins> <ins>shrink-to-fit</ins> <ins>width</ins> <ins>is:</ins> <ins>min(max(preferred</ins> <ins>minimum</ins> <ins>width,</ins>
<ins>available</ins> <ins>width),</ins> <ins>preferred</ins> <ins>width).</ins></p>
<h3><a name="q9"><ins>10.3.6</ins> <ins>Floating,</ins> <ins>replaced</ins> <ins>elements</ins></a></h3>
<p>If <a href="box.html#propdef-margin-left" class="noxref"><span class="propinst-margin-left"> <del>'left'</del> <del>has</del><ins>'margin-left'</ins></span></a> <ins>or</ins> <a href="box.html#propdef-margin-right" class="noxref"><span
class="propinst-margin-right"><ins>'margin-right'</ins></span></a> <ins>are</ins> <ins>computed</ins> <ins>as</ins>
<ins>'auto',</ins> <ins>their</ins> <ins>used</ins> <ins>value</ins> <ins>is</ins> <ins>'0'.</ins> The <ins>used</ins> value <del>'auto'</del> <del>while</del> <del>'direction'</del><ins>of</ins> <a href="visudet.html#propdef-width" class="noxref"><span
class="propinst-width"><ins>'width'</ins></span></a> <ins>is</ins> <ins>determined</ins> <ins>as</ins> <ins>for</ins> <a
href="#inline-replaced-width"><ins>inline</ins> <ins>replaced</ins> <ins>elements</ins></a><ins>.</ins>
</p>
<h3><ins>10.3.7</ins> <a name="abs-non-replaced-width"><ins>Absolutely</ins> <ins>positioned,</ins> <ins>non-replaced</ins> <ins>elements</ins></a></h3>
<p><ins>For</ins> <ins>the</ins> <ins>purposes</ins> <ins>of</ins> <ins>this</ins> <ins>section</ins> <ins>and</ins> <ins>the</ins> <ins>next,</ins> <ins>the</ins> <ins>term</ins> <a
name=static-position><span class=index><ins>"static</ins> <ins>position"</ins></span></a>
<ins>(of</ins> <ins>an</ins> <ins>element)</ins> <ins>refers,</ins> <ins>roughly,</ins>
<ins>to</ins> <ins>the</ins> <ins>position</ins> <ins>an</ins> <ins>element</ins> <ins>would</ins> <ins>have</ins> <ins>had</ins> <ins>in</ins> <ins>the</ins> <ins>normal</ins> <ins>flow.</ins> <ins>More</ins>
<ins>precisely:</ins>
</p>
<ul>
<li><ins>The</ins> <ins>static</ins> <ins>position</ins> <ins>for</ins> <ins>'left'</ins> is <del>'ltr',</del> <del>replace</del> <del>'auto'</del> <del>with</del>the distance from the left edge
of the containing block to the left margin edge of a hypothetical box
that would have been the first box of the element if its <a href="visuren.html#propdef-position" class="noxref"><span
class="propinst-position">'position'</span></a> property had been <del>'static'.</del> <del>(But</del> <del>rather</del> <del>than</del> <del>actually</del> <del>computing</del> <del>that</del> <del>box,</del> <del>user</del> <del>agents</del> <del>are</del> <del>free</del> <del>to</del> <del>make</del> <del>a</del> <del>guess</del> <del>at</del> <del>its</del> <del>probable</del> <del>position.)</del><ins>'static'</ins>
<ins>and</ins> <a href="visuren.html#propdef-float" class="noxref"><span class="propinst-float"><ins>'float'</ins></span></a> <ins>had</ins> <ins>been</ins> <ins>'none'.</ins> The
value is negative if the hypothetical
box is to the left of the containing block.
</li>
<li> <del>If</del> <del>'right'</del> <del>has</del>The <del>value</del> <del>'auto'</del> <del>while</del> <del>'direction'</del><ins>static</ins> <ins>position</ins> <ins>for</ins> <ins>'right'</ins> is <del>'rtl',</del> <del>replace</del> <del>'auto'</del> <del>with</del>the distance from the right
edge of the containing block to the right margin edge of the same
hypothetical box as above. The value is positive if the hypothetical
box is to the left of the containing block's edge.
</li>
</ul>
<p> <del>If</del> <del>'width'</del><ins>But</ins> <ins>rather</ins> <ins>than</ins> <ins>actually</ins> <ins>calculating</ins> <ins>the</ins> <ins>dimensions</ins> <ins>of</ins> <ins>that</ins>
<ins>hypothetical</ins> <ins>box,</ins> <ins>user</ins> <ins>agents</ins> <ins>are</ins> <ins>free</ins> <ins>to</ins> <ins>make</ins> <ins>a</ins> <ins>guess</ins> <ins>at</ins> <ins>its</ins> <ins>probable</ins>
<ins>position.</ins>
</p>
<p><ins>For</ins> <ins>the</ins> <ins>purposes</ins> <ins>of</ins> <ins>calculating</ins> <ins>the</ins> <ins>static</ins> <ins>position,</ins> <ins>the</ins> <ins>containing</ins>
<ins>block</ins> <ins>of</ins> <ins>fixed</ins> <ins>positioned</ins> <ins>elements</ins> is <del>'auto',</del> <del>replace</del> <del>any</del> <del>remaining</del> <del>'auto'</del><ins>the</ins> <ins>initial</ins> <ins>containing</ins> <ins>block</ins>
<ins>instead</ins> <ins>of</ins> <ins>the</ins> <ins>viewport,</ins> <ins>and</ins> <ins>all</ins> <ins>scrollable</ins> <ins>boxes</ins> <ins>should</ins> <ins>be</ins> <ins>assumed</ins> <ins>to</ins>
<ins>be</ins> <ins>scrolled</ins> <ins>to</ins> <ins>their</ins> <ins>origin.</ins>
<p><ins>The</ins> <ins>constraint</ins> <ins>that</ins> <ins>determines</ins> <ins>the</ins> <ins>used</ins> <ins>values</ins> for <ins>these</ins>
<ins>elements</ins> <ins>is:</ins></p>
<blockquote>
<p>'left' <del>or</del><ins>+</ins> <ins>'margin-left'</ins> <ins>+</ins> <ins>'border-left-width'</ins> <ins>+</ins> <ins>'padding-left'</ins> <ins>+</ins> <ins>'width'</ins>
<ins>+</ins> <ins>'padding-right'</ins> <ins>+</ins> <ins>'border-right-width'</ins> <ins>+</ins> <ins>'margin-right'</ins> <ins>+</ins> 'right' <del>with</del> <del>'0'.</del><ins>+</ins>
<ins>scrollbar</ins> <ins>width</ins> <ins>(if</ins> <ins>any)</ins> <ins>=</ins> <ins>width</ins>
<ins>of</ins> <ins>containing</ins> <ins>block</ins> </p>
</blockquote>
<p>If <del>'left'</del> <del>,</del><ins>all</ins> <ins>three</ins> <ins>of</ins> <ins>'left',</ins> <ins>'width',</ins> <ins>and</ins> 'right' <del>or</del> <del>'width'</del>are <del>(still)</del> <del>'auto',</del> <del>replace</del><ins>'auto':</ins> <ins>First</ins> <ins>set</ins>
any 'auto' <del>on</del><ins>values</ins> <ins>for</ins> 'margin-left' <del>or</del><ins>and</ins> 'margin-right' <del>with</del> <del>'0'.</del><ins>to</ins> <ins>0.</ins> <ins>Then,</ins> <ins>if</ins>
<ins>the</ins> <ins>'direction'</ins> <ins>property</ins> <ins>of</ins> <ins>the</ins> <ins>containing</ins> <ins>block</ins> <ins>is</ins> <ins>'ltr'</ins> <ins>set</ins> <ins>'left'</ins>
<ins>to</ins> <ins>the</ins> <a
href="#static-position"><ins>static</ins> <ins>position</ins></a> <ins>and</ins> <ins>apply</ins> <ins>rule</ins> <ins>number</ins>
<ins>three</ins> <ins>below;</ins> <ins>otherwise,</ins> <ins>set</ins> <ins>'right'</ins> <ins>to</ins> <ins>the</ins> <a
href="#static-position"><ins>static</ins> <ins>position</ins></a> <ins>and</ins> <ins>apply</ins> <ins>rule</ins> <ins>number</ins>
<ins>one</ins> <ins>below.</ins></p>
<p><ins>If</ins> <ins>none</ins> <ins>of</ins> <ins>the</ins> <ins>three</ins> <ins>is</ins> <ins>'auto':</ins> If <del>at</del> <del>this</del> <del>point</del>both 'margin-left' and
'margin-right' are <del>still</del>'auto', solve the
equation under the extra constraint that the two margins <del>must</del>get equal
<del>values.</del> <del>If</del> <del>at</del><ins>values,</ins> <ins>unless</ins> this <del>point</del> <del>there</del><ins>would</ins> <ins>make</ins> <ins>them</ins> <ins>negative,</ins> <ins>in</ins> <ins>which</ins> <ins>case</ins> <ins>when</ins>
<ins>direction</ins> <ins>of</ins> <ins>the</ins> <ins>containing</ins> <ins>block</ins> is <del>only</del><ins>'ltr'</ins> <ins>('rtl'),</ins> <ins>set</ins> <ins>'margin-left'</ins>
<ins>('margin-right')</ins> <ins>to</ins> <ins>zero</ins>
<ins>and</ins> <ins>solve</ins> <ins>for</ins> <ins>'margin-right'</ins> <ins>('margin-left').</ins> <ins>If</ins> one <del>'auto'</del> <del>left,</del><ins>of</ins>
<ins>'margin-left'</ins> <ins>or</ins> <ins>'margin-right'</ins> <ins>is</ins> <ins>'auto',</ins> solve the equation for that
value. If <del>at</del> <del>this</del> <del>point</del>the values are over-constrained, ignore the value for <del>either</del>'left'
(in case <ins>the</ins> 'direction' <ins>property</ins> <ins>of</ins> <ins>the</ins> <ins>containing</ins> <ins>block</ins> is 'rtl') or
'right' (in case 'direction' is
'ltr') and solve for that value.</p>
<p> <del>10.3.8</del> <del>Absolutely</del> <del>positioned,</del> <del>replaced</del> <del>elements</del> <del>This</del> <del>situation</del> <del>is</del> <del>similar</del><ins>Otherwise,</ins> <ins>set</ins> <ins>'auto'</ins> <ins>values</ins> <ins>for</ins> <ins>'margin-left'</ins> <ins>and</ins> <ins>'margin-right'</ins>
to <ins>0,</ins> <ins>and</ins> <ins>pick</ins> the <del>previous</del> <del>one,</del> <del>except</del> <del>that</del> <del>the</del> <del>element</del> <del>has</del> <del>an</del> <del>intrinsic</del> <del>width.</del> <del>The</del> <del>sequence</del><ins>one</ins> of <del>substitutions</del> <del>is</del> <del>now:</del> <del>If</del><ins>the</ins> <ins>following</ins> <ins>six</ins> <ins>rules</ins> <ins>that</ins> <ins>applies.</ins></p>
<ol>
<li><ins>'left'</ins> <ins>and</ins> 'width' <ins>are</ins> <ins>'auto'</ins> <ins>and</ins> <ins>'right'</ins> is <ins>not</ins> 'auto', <del>substitute</del><ins>then</ins> the
<del>element's</del> <del>intrinsic</del> <del>width.</del> <del>If</del><ins>width</ins> <ins>is</ins> <ins>shrink-to-fit.</ins> <ins>Then</ins> <ins>solve</ins> <ins>for</ins> 'left'</li>
<li> <del>has</del> <del>the</del> <del>value</del><ins>'left'</ins> <ins>and</ins> <ins>'right'</ins> <ins>are</ins> 'auto' <del>while</del> <del>'direction'</del><ins>and</ins> <ins>'width'</ins> is <del>'ltr',</del> <del>replace</del> <del>'auto'</del> <del>with</del> <del>the</del> <del>distance</del> <del>from</del><ins>not</ins> <ins>'auto',</ins> <ins>then</ins> <ins>if</ins>
the <del>left</del> <del>edge</del><ins>'direction'</ins> <ins>property</ins> of the containing block <ins>is</ins> <ins>'ltr'</ins> <ins>set</ins> <ins>'left'</ins>
to the <a
href="#static-position"> <del>left</del> <del>margin</del> <del>edge</del> <del>of</del> <del>a</del> <del>hypothetical</del> <del>box</del> <del>that</del> <del>would</del> <del>have</del> <del>been</del> <del>the</del> <del>first</del> <del>box</del> <del>of</del> <del>the</del> <del>element</del> <del>if</del> <del>its</del> <del>'position'</del> <del>property</del> <del>had</del> <del>been</del> <del>'static'.</del> <del>(But</del> <del>rather</del> <del>than</del> <del>actually</del> <del>computing</del> <del>that</del> <del>box,</del> <del>user</del> <del>agents</del> <del>are</del> <del>free</del><ins>static</ins> <ins>position</ins></a><ins>,</ins> <ins>otherwise</ins> <ins>set</ins> <ins>'right'</ins>
to <del>make</del> <del>a</del> <del>guess</del> <del>at</del> <del>its</del> <del>probable</del> <del>position.)</del> <del>The</del> <del>value</del> <del>is</del> <del>negative</del> <del>if</del>the <a href="#static-position"> <del>hypothetical</del> <del>box</del><ins>static</ins> <ins>position</ins></a><ins>.</ins> <ins>Then</ins> <ins>solve</ins>
<ins>for</ins> <ins>'left'</ins> <ins>(if</ins> <ins>'direction</ins> is <del>to</del> <del>the</del> <del>left</del> <del>of</del> <del>the</del> <del>containing</del> <del>block.</del> <del>If</del><ins>'rtl')</ins> <ins>or</ins> 'right' <del>has</del> <del>the</del> <del>value</del> <del>'auto'</del> <del>while</del><ins>(if</ins> 'direction' is
<del>'rtl',</del> <del>replace</del><ins>'ltr').</ins></li>
<li><ins>'width'</ins> <ins>and</ins> <ins>'right'</ins> <ins>are</ins> 'auto' <del>with</del><ins>and</ins> <ins>'left'</ins> <ins>is</ins> <ins>not</ins> <ins>'auto',</ins> <ins>then</ins> the
<del>distance</del> <del>from</del> <del>the</del> <del>right</del> <del>edge</del><ins>width</ins> <ins>is</ins> <ins>shrink-to-fit</ins> <ins>.</ins> <ins>Then</ins> <ins>solve</ins> <ins>for</ins> <ins>'right'</ins></li>
<li><ins>'left'</ins> <ins>is</ins> <ins>'auto',</ins> <ins>'width'</ins> <ins>and</ins> <ins>'right'</ins> <ins>are</ins> <ins>not</ins> <ins>'auto',</ins> <ins>then</ins> <ins>solve</ins> <ins>for</ins>
<ins>'left'</ins></li>
<li><ins>'width'</ins> <ins>is</ins> <ins>'auto',</ins> <ins>'left'</ins> <ins>and</ins> <ins>'right'</ins> <ins>are</ins> <ins>not</ins> <ins>'auto',</ins> <ins>then</ins> <ins>solve</ins>
<ins>for</ins> <ins>'width'</ins></li>
<li><ins>'right'</ins> <ins>is</ins> <ins>'auto',</ins> <ins>'left'</ins> <ins>and</ins> <ins>'width'</ins> <ins>are</ins> <ins>not</ins> <ins>'auto',</ins> <ins>then</ins> <ins>solve</ins>
<ins>for</ins> <ins>'right'</ins></li>
</ol>
<p><ins>Calculation</ins> of the <del>containing</del> <del>block</del><ins>shrink-to-fit</ins> <ins>width</ins> <ins>is</ins> <ins>similar</ins> to <ins>calculating</ins>
the <del>right</del> <del>margin</del> <del>edge</del><ins>width</ins> of <ins>a</ins> <ins>table</ins> <ins>cell</ins> <ins>using</ins> the <del>same</del> <del>hypothetical</del> <del>box</del> <del>as</del> <del>above.</del><ins>automatic</ins> <ins>table</ins> <ins>layout</ins> <ins>algorithm.</ins>
<ins>Roughly:</ins> <ins>calculate</ins> <ins>the</ins> <ins>preferred</ins> <ins>width</ins> <ins>by</ins> <ins>formatting</ins> <ins>the</ins> <ins>content</ins>
<ins>without</ins> <ins>breaking</ins> <ins>lines</ins> <ins>other</ins> <ins>than</ins> <ins>where</ins> <ins>explicit</ins> <ins>line</ins> <ins>breaks</ins> <ins>occur,</ins>
<ins>and</ins> <ins>also</ins> <ins>calculate</ins> <ins>the</ins> <ins>preferred</ins> <em><ins>minimum</ins></em> <ins>width,</ins> <ins>e.g.,</ins> <ins>by</ins>
<ins>trying</ins> <ins>all</ins> <ins>possible</ins> <ins>line</ins> <ins>breaks.</ins> <ins>CSS 2.1</ins> <ins>does</ins> <ins>not</ins> <ins>define</ins> <ins>the</ins>
<ins>exact</ins> <ins>algorithm.</ins> <ins>Thirdly,</ins> <ins>calculate</ins> <ins>the</ins> <em><ins>available</ins> <ins>width</ins></em><ins>:</ins> <ins>this</ins>
<ins>is</ins> <ins>found</ins> <ins>by</ins> <ins>solving</ins> <ins>for</ins> <ins>'width'</ins> <ins>after</ins> <ins>setting</ins> <ins>'left'</ins> <ins>(in</ins> <ins>case</ins> <ins>1)</ins> <ins>or</ins>
<ins>'right'</ins> <ins>(in</ins> <ins>case</ins> <ins>3)</ins> <ins>to</ins> <ins>0.</ins></p>
<p><ins>Then</ins> <ins>the</ins> <ins>shrink-to-fit</ins> <ins>width</ins> <ins>is:</ins> <ins>min(max(preferred</ins> <ins>minimum</ins> <ins>width,</ins> <ins>available</ins>
<ins>width),</ins> <ins>preferred</ins> <ins>width).</ins></p>
<p>The <ins>"scrollbar</ins> <ins>width"</ins> value is <del>positive</del><ins>only</ins> <ins>relevant</ins> if the <del>hypothetical</del> <del>box</del><ins>user</ins> <ins>agent</ins> <ins>uses</ins>
<ins>a</ins> <ins>scrollbar</ins> <ins>as</ins> <ins>its</ins> <ins>scrolling</ins> <ins>mechanism.</ins> <ins>See</ins> <ins>the</ins> <ins>definition</ins> <ins>of</ins> <ins>the</ins>
<a href="visufx.html#propdef-overflow" class="noxref"><span class="propinst-overflow"><ins>'overflow'</ins></span></a> <ins>property.</ins></p>
<h3><ins>10.3.8</ins> <a name="abs-replaced-width"><ins>Absolutely</ins> <ins>positioned,</ins> <ins>replaced</ins> <ins>elements</ins></a></h3>
<p><ins>This</ins> <ins>situation</ins> is <ins>similar</ins> to the <del>left</del><ins>previous</ins> <ins>one,</ins> <ins>except</ins> <ins>that</ins> <ins>the</ins>
<ins>element</ins> <ins>has</ins> <ins>an</ins> <a href="conform.html#intrinsic"><ins>intrinsic</ins></a> <ins>width.</ins> <ins>The</ins>
<ins>sequence</ins> <ins>of</ins> <ins>substitutions</ins> <ins>is</ins> <ins>now:</ins></p>
<ol>
<
62B4
;li><ins>The</ins> <ins>used</ins> <ins>value</ins> <ins>of</ins> <a href="visudet.html#propdef-width" class="noxref"><span class="propinst-width"><ins>'width'</ins></span></a> <ins>is</ins>
<ins>determined</ins> <ins>as</ins> <ins>for</ins> <a href="#inline-replaced-width"><ins>inline</ins> <ins>replaced</ins>
<ins>elements</ins></a><ins>.</ins>
</li>
<li><ins>If</ins> <ins>both</ins> <a href="visuren.html#propdef-left" class="noxref"><span class="propinst-left"><ins>'left'</ins></span></a> <ins>and</ins> <a href="visuren.html#propdef-right" class="noxref"><span
class="propinst-right"><ins>'right'</ins></span></a> <ins>have</ins> <ins>the</ins> <ins>value</ins> <ins>'auto',</ins> <ins>then</ins> <ins>if</ins>
<ins>'direction'</ins> of the containing <del>block's</del> <del>edge.</del><ins>block</ins> <ins>is</ins> <ins>'ltr',</ins> <ins>set</ins> <a href="visuren.html#propdef-left" class="noxref"><span
class="propinst-left"><ins>'left'</ins></span></a> <ins>to</ins>
<ins>the</ins> <ins>static</ins> <ins>position;</ins> <ins>else</ins> <ins>if</ins> <ins>'direction'</ins> <ins>is</ins> <ins>'rtl',</ins> <ins>set</ins> <a href="visuren.html#propdef-right" class="noxref"><span
class="propinst-right"><ins>'right'</ins></span></a> <ins>to</ins> <ins>the</ins> <ins>static</ins> <ins>position.</ins>
</li>
<li>If <a href="visuren.html#propdef-left" class="noxref"><span class="propinst-left">'left'</span></a> or <a href="visuren.html#propdef-right" class="noxref"><span
class="propinst-right">'right'</span></a> are 'auto', replace any 'auto'
on <a href="box.html#propdef-margin-left" class="noxref"><span class="propinst-margin-left">'margin-left'</span></a> or <a href="box.html#propdef-margin-right" class="noxref"><span
class="propinst-margin-right">'margin-right'</span></a> with '0'.
</li>
<li>If at this point both <a href="box.html#propdef-margin-left" class="noxref"><span
class="propinst-margin-left">'margin-left'</span></a> and <a href="box.html#propdef-margin-right" class="noxref"><span
class="propinst-margin-right">'margin-right'</span></a> are still 'auto',
solve the equation under the extra constraint that the two margins
must get equal <del>values.</del><ins>values,</ins> <ins>unless</ins> <ins>this</ins> <ins>would</ins> <ins>make</ins> <ins>them</ins> <ins>negative,</ins> <ins>in</ins> <ins>which</ins>
<ins>case</ins> <ins>when</ins> <ins>the</ins> <ins>direction</ins> <ins>of</ins> <ins>the</ins> <ins>containing</ins> <ins>block</ins> <ins>is</ins> <ins>'ltr'</ins> <ins>('rtl'),</ins> <ins>set</ins>
<a href="box.html#propdef-margin-left" class="noxref"><span
class="propinst-margin-left"><ins>'margin-left'</ins></span></a> <ins>(</ins><a href="box.html#propdef-margin-right" class="noxref"><span
class="propinst-margin-right"><ins>'margin-right'</ins></span></a><ins>)</ins> <ins>to</ins> <ins>zero</ins> <ins>and</ins> <ins>solve</ins>
<ins>for</ins> <a href="box.html#propdef-margin-right" class="noxref"><span class="propinst-margin-right"><ins>'margin-right'</ins></span></a> <ins>(</ins><a href="box.html#propdef-margin-left" class="noxref"><span
class="propinst-margin-left"><ins>'margin-left'</ins></span></a><ins>).</ins>
</li>
<li>If at this point there is <del>only</del> <del>one</del><ins>an</ins> 'auto' left, solve the equation
for that value.
</li>
<li>If at this point the values are over-constrained, ignore the value
for either <a href="visuren.html#propdef-left" class="noxref"><span class="propinst-left">'left'</span></a> (in case <ins>the</ins>
<a href="visuren.html#propdef-direction" class="noxref"><span class="propinst-direction">'direction'</span></a> <ins>property</ins> <ins>of</ins> <ins>the</ins>
<ins>containing</ins> <ins>block</ins> is 'rtl') or <a href="visuren.html#propdef-right" class="noxref"><span
class="propinst-right">'right'</span></a> (in case <a href="visuren.html#propdef-direction" class="noxref"><span
class="propinst-direction">'direction'</span></a> is 'ltr') and solve for
that value.
</li>
</ol>
<h3><a name="q12"> <del>10.4</del> <del>Minimum</del> <del>and</del> <del>maximum</del> <del>widths</del> <del>:</del> <del>'min-width'</del> <del>and</del> <del>'max-width'</del> <del>'min-width'</del> <del>Value:</del> <del> </del> <del><length></del> <del>|</del> <del><percentage></del> <del>|</del> <del>inherit</del> <del>Initial:</del> <del> </del> <del>UA</del> <del>dependent</del> <del>Applies</del> <del>to:</del> <del> </del> <del>all</del><ins>10.3.9</ins> <ins>'Inline-block',</ins> <ins>non-replaced</ins> elements <del>except</del> <del>non-replaced</del> <del>inline</del><ins>in</ins> <ins>normal</ins> <ins>flow</ins></a></h3>
<p><ins>If</ins> <a href="visudet.html#propdef-width" class="noxref"><span class="propinst-width"><ins>'width'</ins></span></a> <ins>is</ins> <ins>'auto',</ins> <ins>the</ins>
<ins>used</ins> <ins>value</ins> <ins>is</ins> <ins>the</ins> <a href="#shrink-to-fit-float"><ins>shrink-to-fit</ins></a>
<ins>width</ins> <ins>as</ins> <ins>for</ins> <ins>floating</ins> <ins>elements.</ins>
</p>
<p><ins>A</ins> <ins>computed</ins> <ins>value</ins> <ins>of</ins> <ins>'auto'</ins> <ins>for</ins> <a href="box.html#propdef-margin-left" class="noxref"><span
class="propinst-margin-left"><ins>'margin-left'</ins></span></a> <ins>or</ins> <a href="box.html#propdef-margin-right" class="noxref"><span
class="propinst-margin-right"><ins>'margin-right'</ins></span></a> <ins>becomes</ins> <ins>a</ins> <ins>used</ins>
<ins>value</ins> <ins>of</ins> <ins>'0'.</ins>
</p>
<h3><a name="q13"><ins>10.3.10</ins> <ins>'Inline-block',</ins> <ins>replaced</ins> elements <ins>in</ins> <ins>normal</ins> <ins>flow</ins></a></h3>
<p><ins>Exactly</ins> <ins>as</ins> <a href="#inline-replaced-width"><ins>inline</ins> <ins>replaced</ins>
<ins>elements.</ins></a>
</p>
<h2><ins>10.4</ins> <a name="min-max-widths"><ins>Minimum</ins> and <del>table</del><ins>maximum</ins> <ins>widths</ins></a><ins>:</ins> <a href="visudet.html#propdef-min-width" class="noxref"><span
class="propinst-min-width"><ins>'min-width'</ins></span></a> <ins>and</ins> <a href="visudet.html#propdef-max-width" class="noxref"><span
class="propinst-max-width"><ins>'max-width'</ins></span></a></h2>
<div class="propdef">
<dl><dt>
<span class="index-def" title="'min-width'"><a name="propdef-min-width" class="propdef-title"><strong><ins>'min-width'</ins></strong></a></span>
<dd>
<table class="propinfo" cellspacing=0 cellpadding=0>
<tr valign=baseline><td><em><ins>Value:</ins></em><ins> </ins><td><a href="syndata.html#value-def-length" class="noxref"><span class="value-inst-length"><ins><length></ins></span></a> <ins>|</ins> <a href="syndata.html#value-def-percentage" class="noxref"><span class="value-inst-percentage"><ins><percentage></ins></span></a> <ins>|</ins> <a href="cascade.html#value-def-inherit" class="noxref"><span class="value-inst-inherit"><ins>inherit</ins></span></a>
<tr valign=baseline><td><em><ins>Initial:</ins></em><ins> </ins><td><ins>0</ins>
<tr valign=baseline><td><em><ins>Applies</ins> <ins>to:</ins></em><ins> </ins><td><ins>all</ins> elements <ins>but</ins> <ins>non-replaced</ins> <ins>inline</ins> <ins>elements,</ins> <ins>table</ins> <ins>rows,</ins> <ins>and</ins> <ins>row</ins> <ins>groups</ins>
<tr valign=baseline><td><em>Inherited:</em> <td>no
<tr valign=baseline><td><em>Percentages:</em> <td>refer to width of containing block
<tr valign=baseline><td><em>Media:</em> <td><a href="media.html#visual-media-group" class="noxref">visual</a>
<tr valign=baseline><td><em><ins>Computed value:</ins></em><ins> </ins><td><ins>the</ins> <ins>percentage</ins> <ins>as</ins> <ins>specified</ins> <ins>or</ins> <ins>the</ins> <ins>absolute</ins> <ins>length</ins>
</table>
</dl>
</div>
<div class="propdef">
<dl><dt>
<span class="index-def" title="'max-width'"><a name="propdef-max-width" class="propdef-title"><strong>'max-width'</strong></a></span>
<dd>
<table class="propinfo" cellspacing=0 cellpadding=0>
<tr valign=baseline><td><em>Value:</em> <td><a href="syndata.html#value-def-length" class="noxref"><span class="value-inst-length"><length></span></a> | <a href="syndata.html#value-def-percentage" class="noxref"><span class="value-inst-percentage"><percentage></span></a> | none | <a href="cascade.html#value-def-inherit" class="noxref"><span class="value-inst-inherit">inherit</span></a>
<tr valign=baseline><td><em>Initial:</em> <td>none
<tr valign=baseline><td><em>Applies to:</em> <td>all elements <del>except</del><ins>but</ins> non-replaced inline <del>elements</del> <del>and</del><ins>elements,</ins> table <del>elements</del><ins>rows,</ins> <ins>and</ins> <ins>row</ins> <ins>groups</ins>
<tr valign=baseline><td><em>Inherited:</em> <td>no
<tr valign=baseline><td><em>Percentages:</em> <td>refer to width of containing block
<tr valign=baseline><td><em>Media:</em> <td><a href="media.html#visual-media-group" class="noxref">visual</a>
<tr valign=baseline><td><em><ins>Computed value:</ins></em><ins> </ins><td><ins>the</ins> <ins>percentage</ins> <ins>as</ins> <ins>specified</ins> <ins>or</ins> <ins>the</ins> <ins>absolute</ins> <ins>length</ins> <ins>or</ins> <ins>'none'</ins>
</table>
</dl>
</div>
<p>These two properties allow authors to constrain <del>box</del><ins>content</ins> widths to a
certain range. Values have the following meanings:</p>
<dl>
<dt><span class="index-inst" title="<length>"><a name="x8" href="syndata.html#value-def-length" class="noxref"><span class="value-inst-length"><strong><length></strong></span></a></span>
</dt>
<dd>Specifies a fixed minimum or maximum <del>computed</del><ins>used</ins> width.
</dd>
<dt><span class="index-inst" title="<percentage>"><a name="x9" href="syndata.html#value-def-percentage" class="noxref"><span class="value-inst-percentage"><strong><percentage></strong></span></a></span>
</dt>
<dd>Specifies a percentage for determining the <del>computed</del><ins>used</ins> value. The
percentage is calculated with respect to the width of the generated
box's <a href="visuren.html#containing-block">containing block</a>.
<ins>If</ins> <ins>the</ins> <ins>containing</ins> <ins>block's</ins> <ins>width</ins> <ins>is</ins> <ins>negative,</ins> <ins>the</ins> <ins>used</ins> <ins>value</ins> <ins>is</ins>
<ins>zero.</ins>
<ins>If</ins> <ins>the</ins> <ins>containing</ins> <ins>block's</ins> <ins>width</ins> <ins>depends</ins> <ins>on</ins> <ins>this</ins> <ins>element's</ins> <ins>width,</ins>
<ins>then</ins> <ins>the</ins> <ins>resulting</ins> <ins>layout</ins> <ins>is</ins> <ins>undefined</ins> <ins>in</ins> <ins>CSS</ins> <ins>2.1.</ins>
</dd>
<dt><strong>none</strong>
</dt>
<dd>(Only on <a href="visudet.html#propdef-max-width" class="noxref"><span class="propinst-max-width">'max-width'</span></a>) No
limit on the width of the box.
</dd>
</dl>
<p><ins>Negative</ins> <ins>values</ins> <ins>for</ins> <a href="visudet.html#propdef-min-width" class="noxref"><span
class="propinst-min-width"><ins>'min-width'</ins></span></a> <ins>and</ins> <a href="visudet.html#propdef-max-width" class="noxref"><span
class="propinst-max-width"><ins>'max-width'</ins></span></a> <ins>are</ins> <ins>illegal.</ins>
</p>
<p>The following algorithm describes how the two properties influence
the <a href="cascade.html#computed-value"> <del>computed</del><ins>used</ins> value</a>
of the <a href="visudet.html#propdef-width" class="noxref"><span class="propinst-width">'width'</span></a> property:</p>
<ol>
<li>The <ins>tentative</ins> <ins>used</ins> width is <del>computed</del><ins>calculated</ins> (without <a href="visudet.html#propdef-min-width" class="noxref"><span
class="propinst-min-width">'min-width'</span></a> and <a href="visudet.html#propdef-max-width" class="noxref"><span
class="propinst-max-width">'max-width'</span></a>) following the rules
under <a href="#Computing_widths_and_margins"> <del>"Computing</del><ins>"Calculating</ins> widths and
margins"</a> above.
</li>
<li>If the <del>computed</del> <del>value</del> <del>of</del> <del>'min-width'</del> <del>is</del> <del>greater</del> <del>than</del> <del>the</del> <del>value</del> <del>of</del> <del>'max-width'</del> <del>,</del> <del>'max-width'</del> <del>is</del> <del>set</del> <del>to</del> <del>the</del> <del>value</del> <del>of</del> <del>'min-width'</del> <del>.</del> <del>If</del> <del>the</del> <del>computed</del><ins>tentative</ins> <ins>used</ins> width is greater than <a href="visudet.html#propdef-max-width" class="noxref"><span
class="propinst-max-width">'max-width'</span></a>, the rules <a
href="#Computing_widths_and_margins">above</a> are applied again, but
this time using the <ins>computed</ins> value of <a href="visudet.html#propdef-max-width" class="noxref"><span
class="propinst-max-width">'max-width'</span></a> as the <del>specified</del><ins>computed</ins> value
for <a href="visudet.html#propdef-width" class="noxref"><span class="propinst-width">'width'</span></a>.
</li>
<li>If the <del>computed</del><ins>resulting</ins> width is smaller than <a href="visudet.html#propdef-min-width" class="noxref"><span
class="propinst-min-width">'min-width'</span></a>, the rules <a
href="#Computing_widths_and_margins">above</a> are applied again, but
this time using the value of <a href="visudet.html#propdef-min-width" class="noxref"><span
class="propinst-min-width">'min-width'</span></a> as the <del>specified</del><ins>computed</ins> value
for <a href="visudet.html#propdef-width" class="noxref"><span class="propinst-width">'width'</span></a>.
</li>
</ol>
<p class="note"><ins>These</ins> <ins>steps</ins> <ins>do</ins> <ins>not</ins> <ins>affect</ins> the <del>user</del> <del>agent</del> <del>may</del> <del>define</del> <del>a</del> <del>non-negative</del> <del>minimum</del> <del>value</del><ins>real</ins> <ins>computed</ins> <ins>values</ins> <ins>of</ins>
<
2DD0
;ins>the</ins> <ins>above</ins> <ins>properties.</ins></p>
<p><ins>However,</ins> for <ins>replaced</ins> <ins>elements</ins> <ins>with</ins> <ins>an</ins> <ins>intrinsic</ins> <ins>ratio</ins> <ins>and</ins> <ins>both</ins>
<a href="visudet.html#propdef-width" class="noxref"><span
class="propinst-width"><ins>'width'</ins></span></a> <ins>and</ins> <a href="visudet.html#propdef-height" class="noxref"><span
class="propinst-height"><ins>'height'</ins></span></a> <ins>specified</ins> <ins>as</ins> <ins>'auto',</ins> the
<del>'min-width'</del> <del>property,</del> <del>which</del> <del>may</del> <del>vary</del><ins>algorithm</ins> <ins>is</ins> <ins>as</ins> <ins>follows:</ins>
</p>
<p><ins>Select</ins> from <del>element</del> <del>to</del> <del>element</del><ins>the</ins> <ins>table</ins> <ins>the</ins> <ins>resolved</ins> <ins>height</ins> and <del>even</del> <del>depend</del> <del>on</del> <del>other</del> <del>properties.</del> <del>If</del> <del>'min-width'</del> <del>goes</del> <del>below</del><ins>width</ins> <ins>values</ins> <ins>for</ins> <ins>the</ins>
<ins>appropriate</ins> <ins>constraint</ins> <ins>violation.</ins> <ins>Take</ins> <ins>the</ins> <var><ins>max-width</ins></var> <ins>and</ins>
<var><ins>max-height</ins></var> <ins>as</ins> <ins>max(min,</ins> <ins>max)</ins> <ins>so</ins> <ins>that</ins> <var><ins>min</ins></var> <ins>≤</ins>
<var><ins>max</ins></var> <ins>holds</ins> <ins>true.</ins>
<ins>In</ins> this <del>limit,</del> <del>either</del> <del>because</del> <del>it</del> <del>was</del> <del>set</del> <del>explicitly,</del> <del>or</del> <del>because</del> <del>it</del> <del>was</del> <del>'auto'</del><ins>table</ins> <var><ins>w</ins></var> and <var><ins>h</ins></var> <ins>stand</ins> <ins>for</ins> the <del>rules</del> <del>below</del> <del>would</del> <del>make</del> <del>it</del> <del>too</del> <del>small,</del><ins>results</ins> <ins>of</ins>
the <del>user</del> <del>agent</del><ins>width</ins> <ins>and</ins> <ins>height</ins> <ins>computations</ins> <ins>ignoring</ins> <ins>the</ins> <a href="visudet.html#propdef-min-width" class="noxref"><span
class="propinst-min-width"><ins>'min-width'</ins></span></a><ins>,</ins> <a href="visudet.html#propdef-min-height" class="noxref"><span
class="propinst-min-height"><ins>'min-height'</ins></span></a><ins>,</ins> <a href="visudet.html#propdef-max-width" class="noxref"><span
class="propinst-max-width"><ins>'max-width'</ins></span></a> <ins>and</ins> <a href="visudet.html#propdef-max-height" class="noxref"><span
class="propinst-max-height"><ins>'max-height'</ins></span></a> <ins>properties.</ins> <ins>Normally</ins>
<ins>these</ins> <ins>are</ins> <ins>the</ins> <ins>intrinsic</ins> <ins>width</ins> <ins>and</ins> <ins>height,</ins> <ins>but</ins> <ins>they</ins> may <del>use</del><ins>not</ins> <ins>be</ins> <ins>in</ins> the
<ins>case</ins> <ins>of</ins> <ins>replaced</ins> <ins>elements</ins> <ins>with</ins> <ins>intrinsic</ins> <ins>ratios.</ins>
<div class=issue>
<p><ins>In</ins> <ins>cases</ins> <ins>where</ins> <ins>an</ins> <ins>explicit</ins> <ins>width</ins> <ins>or</ins> <ins>height</ins> <ins>is</ins> <ins>set</ins> <ins>and</ins> <ins>the</ins> <ins>other</ins>
<ins>dimension</ins> <ins>is</ins> <ins>auto,</ins> <ins>applying</ins> <ins>a</ins> minimum <del>value</del><ins>or</ins> <ins>maximum</ins> <ins>constraint</ins> <ins>on</ins> <ins>the</ins>
<ins>auto</ins> <ins>side</ins> <ins>can</ins> <ins>cause</ins> <ins>a</ins> <ins>conflict</ins> <ins>between</ins> <ins>honoring</ins> <ins>the</ins> <ins>explicit</ins> <ins>dimension</ins>
<ins>and</ins> <ins>honoring</ins> <ins>the</ins> <ins>(implicit)</ins> <ins>aspect</ins> <ins>ratio.</ins> <ins>The</ins> <ins>Working</ins> <ins>Group</ins> <ins>is</ins> <ins>split</ins>
<ins>on</ins> <ins>how</ins> <ins>best</ins> <ins>to</ins> <ins>resolve</ins> <ins>the</ins> <ins>issue:</ins> <ins>should</ins> <ins>the</ins> <ins>result</ins> <ins>be</ins> <ins>as</ins> <ins>close</ins> <ins>as</ins>
<ins>possible</ins> <ins>to</ins> <ins>(but</ins> <ins>not</ins> <ins>necessarily)</ins> <ins>preserving</ins> <ins>the</ins> <ins>aspect</ins> <ins>ratio</ins> <ins>while</ins>
<ins>always</ins> <ins>honoring</ins> <ins>explicit</ins> <ins>widths</ins> <ins>and</ins> <ins>heights,</ins> <ins>or</ins> <ins>should</ins> <ins>the</ins> <ins>result</ins> <ins>be</ins>
<ins>as</ins> <ins>close</ins> as <ins>possible</ins> <ins>to</ins> <ins>(but</ins> <ins>not</ins> <ins>necessarily)</ins> <ins>honoring</ins> <ins>the</ins> <ins>explicit</ins>
<ins>dimension</ins> <ins>while</ins> <ins>always</ins> <ins>honoring</ins> <ins>the</ins> <ins>aspect</ins> <ins>ratio?</ins>
<p><ins>Here</ins> <ins>is</ins> <ins>an</ins> <ins>example</ins> <ins>of</ins> <ins>the</ins> <ins>scenario</ins> <ins>in</ins> <ins>mind:</ins> <ins>A</ins> <ins>1:1</ins> <ins>image</ins> <ins>is</ins> <ins>given</ins>
<ins>the</ins> <ins>following</ins> <ins>style</ins> <ins>declarations;</ins>
<pre><ins>width:</ins> <ins>200px;</ins> <ins>min-height:</ins> <ins>300px;</ins></pre>
<p><ins>If</ins> <ins>we</ins> <ins>honor</ins> <ins>the</ins> <ins>width</ins> <ins>over</ins> <ins>the</ins> <ins>aspect</ins> <ins>ratio,</ins> <ins>the</ins> <ins>image</ins> <ins>winds</ins> <ins>up</ins>
<ins>200px</ins> <ins>width</ins> <ins>by</ins> <ins>300px</ins> <ins>height.</ins> <ins>If</ins> <ins>we</ins> <ins>honor</ins> <ins>the</ins> <ins>aspect</ins> <ins>ratio</ins> <ins>over</ins> <ins>the</ins>
<ins>width,</ins> <ins>the</ins> <ins>image</ins> <ins>winds</ins> <ins>up</ins> <ins>300px</ins> <ins>width</ins> <ins>by</ins> <ins>300px</ins> <ins>height.</ins>
<p><ins>This</ins> <ins>draft</ins> <ins>specifies</ins> <ins>the</ins> <ins>former</ins> <ins>behavior.</ins> <ins>We</ins> <ins>are</ins> <ins>not</ins> <ins>yet</ins> <ins>committed</ins>
<ins>either</ins> <ins>way,</ins> <ins>and</ins> <ins>would</ins> <ins>appreciate</ins> <ins>feedback</ins> <ins>from</ins> <ins>the</ins> <ins>authoring</ins> <ins>community</ins>
<ins>on</ins> <ins>this</ins> <ins>issue.</ins>
</div>
<table rules=all>
<thead>
<tr><th><ins>Constraint</ins> <ins>Violation</ins></th><th><ins>Resolved</ins> <ins>Width</ins></th><th><ins>Resolved</ins> <ins>Height</ins></th></tr>
</thead>
<tbody>
<tr><td><ins>none</ins></td>
<td><var><ins>w</ins></var></td>
<td><var><ins>h</ins></var></td></tr>
<tr><td><var><ins>w > max-width</ins></var></td>
<td><var><ins>max-width</ins></var></td>
<td><var><ins>max(max-width * h/w,</ins> <ins>min-height)</ins></var></td></tr>
<tr><td><var><ins>w </ins>< min-width</var></td>
<td><var><ins>min-width</ins></var></td>
<td><var><ins>min(min-width * h/w,</ins> <ins>max-height)</ins></var></td></tr>
<tr><td><var><ins>h > max-height</ins></var></td>
<td><var><ins>max(max-height * w/h,</ins> <ins>min-width)</ins></var></td>
<td><var><ins>max-height</ins></var></td></tr>
<tr><td><var><ins>h </ins>< min-height</var></td>
<td><var><ins>min(min-height * w/h,</ins> <ins>max-width)</ins></var></td>
<td><var><ins>min-height</ins></var></td></tr>
<tr><td><ins>(</ins><var><ins>w > max-width</ins></var><ins>)</ins> <ins>and</ins> <ins>(</ins><var><ins>h > max-height</ins></var><ins>),</ins> <ins>where</ins> <ins>(</ins><var><ins>max-width/w ≤ max-height/h</ins></var><ins>)</ins></td>
<td><var><ins>max-width</ins></var></td>
<td><var><ins>max(min-height,</ins> <ins>max-width * h/w)</ins></var></td></tr>
<tr><td><ins>(</ins><var><ins>w > max-width</ins></var><ins>)</ins> <ins>and</ins> <ins>(</ins><var><ins>h > max-height</ins></var><ins>),</ins> <ins>where</ins> <ins>(</ins><var><ins>max-width/w > max-height/h</ins></var><ins>)</ins></td>
<td><var><ins>max(min-width,</ins> <ins>max-height * w/h)</ins></var></td>
<td><var><ins>max-height</ins></var></td></tr>
<tr><td><ins>(</ins><var><ins>w </ins>< min-width</var><ins>)</ins> <ins>and</ins> <ins>(</ins><var><ins>h </ins>< min-height</var><ins>),</ins> <ins>where</ins> <ins>(</ins><var><ins>min-width/w ≤ min-height/h</ins></var><ins>)</ins></td>
<td><var><ins>min(max-width,</ins> <ins>min-height * w/h)</ins></var></td>
<td><var><ins>min-height</ins></var></td></tr>
<tr><td><ins>(</ins><var><ins>w </ins>< min-width</var><ins>)</ins> <ins>and</ins> <ins>(</ins><var><ins>h </ins>< min-height</var><ins>),</ins> <ins>where</ins> <ins>(</ins><var><ins>min-width/w > min-height/h</ins></var><ins>)</ins></td>
<td><var><ins>min-width</ins></var></td>
<td><var><ins>min(max-height,</ins> <ins>min-width * h/w)</ins></var></td></tr>
<tr><td><ins>(</ins><var><ins>w </ins>< min-width</var><ins>)</ins> <ins>and</ins> <ins>(</ins><var><ins>h > max-height</ins></var><ins>)</ins></td>
<td><var><ins>min-width</ins></var></td>
<td><var><ins>max-height</ins></var></td></tr>
<tr><td><ins>(</ins><var><ins>w > max-width</ins></var><ins>)</ins> <ins>and</ins> <ins>(</ins><var><ins>h </ins>< min-height</var><ins>)</ins></td>
<td><var><ins>max-width</ins></var></td>
<td><var><ins>min-height</ins></var></td></tr>
</tbody>
</table>
<p><ins>Then</ins> <ins>apply</ins> the <ins>rules</ins> <ins>under</ins> <a
href="#Computing_widths_and_margins"><ins>"Calculating</ins> <ins>widths</ins> <ins>and</ins>
<ins>margins"</ins></a> <ins>above,</ins> <ins>as</ins> <ins>if</ins> <a href="visudet.html#propdef-width" class="noxref"><span class="propinst-width"><ins>'width'</ins></span></a>
<ins>were</ins> computed <ins>as</ins> <ins>this</ins> value.
<h2>10.5 <a name="the-height-property">Content height</a>: the <a href="visudet.html#propdef-height" class="noxref"><span
class="propinst-height">'height'</span></a> property</h2>
<div class="propdef">
<dl><dt>
<span class="index-def" title="'height'"><a name="propdef-height" class="propdef-title"><strong>'height'</strong></a></span>
<dd>
<table class="propinfo" cellspacing=0 cellpadding=0>
<tr valign=baseline><td><em>Value:</em> <td><a href="syndata.html#value-def-length" class="noxref"><span class="value-inst-length"><length></span></a> | <a href="syndata.html#value-def-percentage" class="noxref"><span class="value-inst-percentage"><percentage></span></a> | auto | <a href="cascade.html#value-def-inherit" class="noxref"><span class="value-inst-inherit">inherit</span></a>
<tr valign=baseline><td><em>Initial:</em> <td>auto
<tr valign=baseline><td><em>Applies to:</em> <td>all elements but non-replaced inline elements, table columns, and column groups
<tr valign=baseline><td><em>Inherited:</em> <td>no
<tr valign=baseline><td><em>Percentages:</em> <td>see prose
<tr valign=baseline><td><em>Media:</em> <td><a href="media.html#visual-media-group" class="noxref">visual</a>
<tr valign=baseline><td><em><ins>Computed value:</ins></em><ins> </ins><td><ins>the</ins> <ins>percentage</ins> <ins>or</ins> <ins>'auto'</ins> <ins>(see</ins> <ins>prose</ins> <ins>under</ins> <a href="syndata.html#value-def-percentage" class="noxref"><span class="value-inst-percentage"><ins><percentage></ins></span></a><ins>)</ins> <ins>or</ins> <ins>the</ins> <ins>absolute</ins> <ins>length;</ins> <ins>'auto'</ins> <ins>if</ins> <ins>the</ins> <ins>property</ins> <ins>does</ins> <ins>not</ins> <ins>apply</ins>
</table>
</dl>
</div>
<p> This property specifies the <a
href="box.html#content-height">content height</a> of boxes generated
by <del>block-level</del><ins>block-level,</ins> <ins>inline-block</ins> and <a
href="conform.html#replaced-element">replaced</a> elements.
</p>
<p>This property does not apply to non-replaced <a
href="visuren.html#inline-level">inline-level</a> elements. <ins>See</ins> the <a
href="#inline-non-replaced"> <del>height</del> <del>of</del> <del>a</del><ins>section</ins> <ins>on</ins> <ins>computing</ins> <ins>heights</ins> <ins>and</ins> <ins>margins</ins>
<ins>for</ins> non-replaced inline <del>element's</del> <del>boxes</del> <del>is</del> <del>given</del> <del>by</del><ins>elements</ins></a> <ins>for</ins> the <del>element's</del> <del>(possibly</del> <del>inherited)</del> <del>'line-height'</del> <del>value.</del><ins>rules</ins> <ins>used</ins> <ins>instead.</ins>
</p>
<p>Values have the following meanings:</p>
<dl>
<dt><span class="index-inst" title="<length>"><a name="x11" href="syndata.html#value-def-length" class="noxref"><span class="value-inst-length"><strong><length></strong></span></a></span>
</dt>
<dd>Specifies <ins>the</ins> <ins>height</ins> <ins>of</ins> <ins>the</ins> <ins>content</ins> <ins>area</ins> <ins>using</ins> a <del>fixed</del> <del>height.</del><ins>length</ins> <ins>value.</ins>
</dd>
<dt><span class="index-inst" title="<percentage>"><a name="x12" href="syndata.html#value-def-percentage" class="noxref"><span class="value-inst-percentage"><strong><percentage></strong></span></a></span>
</dt>
<dd>Specifies a percentage height. The percentage is calculated with
respect to the height of the generated box's <a
href="visuren.html#containing-block">containing block</a>. If the
height of the containing block is not specified explicitly (i.e., it
depends on content height), <ins>and</ins> <ins>this</ins> <ins>element</ins> <ins>is</ins> <ins>not</ins> <ins>absolutely</ins>
<ins>positioned,</ins> the value <del>is</del> <del>interpreted</del> <del>like</del><ins>computes</ins> <ins>to</ins> 'auto'. <del>auto</del> <del>The</del><ins>A</ins> <ins>percentage</ins> height
<del>depends</del><ins>on</ins> <ins>the</ins> <a href="conform.html#root"><ins>root</ins> <ins>element</ins></a> <ins>is</ins> <ins>relative</ins> <ins>to</ins> <ins>the</ins>
<a href="#containing-block-details"><ins>initial</ins> <ins>containing</ins> <ins>block</ins></a><ins>.</ins>
</dd>
<dt><strong><ins>auto</ins></strong>
</dt>
<dd><ins>The</ins> <ins>height</ins> <ins>depends</ins> on the values of other properties.
See the prose below.
</dd>
</dl>
<p class="note"><ins>Note</ins> <ins>that</ins> <ins>the</ins> <ins>height</ins> <ins>of</ins> <ins>the</ins> <ins>containing</ins> <ins>block</ins> <ins>of</ins> <ins>an</ins>
<ins>absolutely</ins> <ins>positioned</ins> <ins>element</ins> <ins>is</ins> <ins>independent</ins> <ins>of</ins> <ins>the</ins> <ins>size</ins> <ins>of</ins> <ins>the</ins>
<ins>element</ins> <ins>itself,</ins> <ins>and</ins> <ins>thus</ins> <ins>a</ins> <ins>percentage</ins> <ins>height</ins> <ins>on</ins> <ins>such</ins> <ins>an</ins> <ins>element</ins> <ins>can</ins>
<ins>always</ins> <ins>be</ins> <ins>resolved.</ins> <ins>However,</ins> <ins>it</ins> <ins>may</ins> <ins>be</ins> <ins>that</ins> <ins>the</ins> <ins>height</ins> <ins>is</ins> <ins>not</ins> <ins>known</ins>
<ins>until</ins> <ins>elements</ins> <ins>that</ins> <ins>come</ins> <ins>later</ins> <ins>in</ins> <ins>the</ins> <ins>document</ins> <ins>have</ins> <ins>been</ins> <ins>processed.</ins>
</p>
<p>Negative values for <a href="visudet.html#propdef-height" class="noxref"><span class="propinst-height">'height'</span></a>
are illegal.
</p>
<div class="example"><P style="display:none">Example(s):</P><p>
For example, the following rule <del>fixes</del><ins>sets</ins> the <ins>content</ins> height of paragraphs
to 100 pixels:</p>
<pre>
p { height: 100px }
</pre>
<p>Paragraphs <del>that</del> <del>require</del> <del>more</del> <del>than</del> <del>100</del> <del>pixels</del>of <ins>which</ins> <ins>the</ins> height <ins>of</ins> <ins>the</ins> <ins>contents</ins> <ins>exceeds</ins> <ins>100</ins> <ins>pixels</ins>
will <a href="visufx.html#overflow">overflow</a> according to the
<a href="visufx.html#propdef-overflow" class="noxref"><span class="propinst-overflow">'overflow'</span></a> property.
</p>
</div>
<h2>10.6 <a name="Computing_heights_and_margins"> <del>Computing</del><ins>Calculating</ins> heights and
margins</a></h2>
<p>For <del>computing</del><ins>calculating</ins> the values of <a href="visuren.html#propdef-top" class="noxref"><span class="propinst-top">'top'</span></a>, <a href="box.html#propdef-margin-top" class="noxref"><span class="propinst-margin-top">'margin-top'</span></a>, <a href="visudet.html#propdef-height" class="noxref"><span class="propinst-height">'height'</span></a>,
<a href="box.html#propdef-margin-bottom" class="noxref"><span class="propinst-margin-bottom">'margin-bottom'</span></a>, and <a href="visuren.html#propdef-bottom" class="noxref"><span class="propinst-bottom">'bottom'</span></a> a distinction must be made between
various kinds of boxes:
</p>
<ol>
<li>inline, non-replaced elements</li>
<li>inline, replaced elements</li>
<li>block-level, non-replaced elements in normal flow</li>
<li>block-level, replaced elements in normal flow</li>
<li>floating, non-replaced elements</li>
<li>floating, replaced elements</li>
<li>absolutely positioned, non-replaced elements</li>
<li>absolutely positioned, replaced elements</li>
<li> <del>Points</del> <del>1-6</del> <del>include</del> <del>relative</del> <del>positioning.</del> <del>10.6.1</del> <del>Inline,</del><ins>'inline-block',</ins> non-replaced elements <del>If</del> <del>'top'</del> <del>,</del> <del>'bottom'</del> <del>,</del> <del>'margin-top'</del> <del>,</del> <del>or</del> <del>'margin-bottom'</del> <del>are</del> <del>'auto',</del> <del>their</del> <del>computed</del> <del>value</del> <del>is</del> <del>0.</del> <del>The</del> <del>'height'</del> <del>property</del> <del>doesn't</del> <del>apply,</del> <del>but</del> <del>the</del> <del>height</del> <del>of</del> <del>the</del> <del>box</del> <del>is</del> <del>given</del> <del>by</del> <del>the</del> <del>'line-height'</del> <del>property.</del> <del>10.6.2</del> <del>Inline,</del> <del>replaced</del> <del>elements</del> <del>block-level,</del><ins>in</ins> <ins>normal</ins> <ins>flow</ins></li>
<li><ins>'inline-block',</ins> replaced elements in normal <del>flow,</del><ins>flow</ins></li>
</ol>
<p><ins>For</ins> <ins>Points</ins> <ins>1-6</ins> and <del>floating,</del> <del>replaced</del> <del>elements</del> <del>If</del><ins>9-10,</ins> <ins>the</ins> <ins>used</ins> <ins>values</ins> <ins>of</ins> 'top' <del>,</del><ins>and</ins>
'bottom' <del>,</del> <del>'margin-top'</del> <del>,</del> <del>or</del> <del>'margin-bottom'</del>are <del>'auto',</del> <del>their</del> <del>computed</del> <del>value</del> <del>is</del> <del>0.</del> <del>If</del> <del>'height'</del> <del>is</del> <del>'auto',</del> <del>the</del> <del>computed</del> <del>value</del> <del>is</del><ins>determined</ins> <ins>by</ins> the <del>intrinsic</del> <del>height.</del> <del>10.6.3</del> <del>Block-level,</del> <del>non-replaced</del> <del>elements</del><ins>rules</ins> in <del>normal</del> <del>flow,</del> <del>and</del> <del>floating,</del><ins>section</ins> <ins>9.4.3.</ins>
</p>
<p class=note><ins>Note:</ins> <ins>these</ins> <ins>rules</ins> <ins>apply</ins> <ins>to</ins>
<ins>the</ins> <ins>root</ins> <ins>element</ins> <ins>just</ins> <ins>as</ins> <ins>to</ins> <ins>any</ins> <ins>other</ins> <ins>element.</ins>
<h3><ins>10.6.1</ins> <a name="inline-non-replaced"><ins>Inline,</ins> non-replaced elements</a></h3>
<p> <del>If</del> <del>'top'</del> <del>,</del> <del>'bottom'</del> <del>,</del> <del>'margin-top'</del> <del>,</del> <del>or</del> <del>'margin-bottom'</del> <del>are</del> <del>'auto',</del> <del>their</del> <del>computed</del> <del>value</del> <del>is</del> <del>0.</del> <del>If</del><ins>The</ins> <a href="visudet.html#propdef-height" class="noxref"><span class="propinst-height">'height'</span></a> <del>is</del> <del>'auto',</del><ins>property</ins> <ins>doesn't</ins>
<ins>apply.</ins> The height <del>depends</del><ins>of</ins> <ins>the</ins> <ins>content</ins> <ins>area</ins> <ins>should</ins> <ins>be</ins> <ins>based</ins> on <del>whether</del>the <del>element</del> <del>has</del> <del>any</del> <del>block-level</del> <del>children.</del> <del>If</del> <del>it</del> <del>only</del> <del>has</del> <del>inline-level</del> <del>children,</del><ins>font,</ins> <ins>but</ins>
<ins>this</ins> <ins>specification</ins> <ins>does</ins> <ins>not</ins> <ins>specify</ins> <ins>how.</ins> <ins>A</ins> <ins>UA</ins> <ins>may,</ins> <ins>e.g.,</ins> <ins>use</ins> the
<del>height</del> <del>is</del> <del>from</del><ins>em-box</ins> <ins>or</ins> the <del>top</del><ins>maximum</ins> <ins>ascender</ins> <ins>and</ins> <ins>descender</ins> of the <del>topmost</del> <del>line</del> <del>box</del> <del>to</del><ins>font.</ins> <ins>(The</ins> <ins>latter</ins>
<ins>would</ins> <ins>ensure</ins> <ins>that</ins> <ins>glyphs</ins> <ins>with</ins> <ins>parts</ins> <ins>above</ins> <ins>or</ins> <ins>below</ins> the <del>bottom</del><ins>em-box</ins> <ins>still</ins>
<ins>fall</ins> <ins>within</ins> <ins>the</ins> <ins>content</ins> <ins>area,</ins> <ins>but</ins> <ins>leads</ins> <ins>to</ins> <ins>differently</ins> <ins>sized</ins> <ins>boxes</ins> <ins>for</ins>
<ins>different</ins> <ins>fonts;</ins> <ins>the</ins> <ins>former</ins> <ins>would</ins> <ins>ensure</ins> <ins>authors</ins> <ins>can</ins> <ins>control</ins>
<ins>background</ins> <ins>styling</ins> <ins>relative</ins> <ins>to</ins> <ins>the</ins> <ins>'line-height',</ins> <ins>but</ins> <ins>leads</ins> <ins>to</ins> <ins>glyphs</ins>
<ins>painting</ins> <ins>outside</ins> <ins>their</ins> <ins>content</ins> <ins>area.)</ins>
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<p class=note><ins>Note:</ins> <ins>level</ins> <ins>3</ins> <ins>of</ins> <ins>CSS</ins> <ins>will</ins> <ins>probably</ins> <ins>include</ins> <ins>a</ins> <ins>property</ins> <ins>to</ins>
<ins>select</ins> <ins>which</ins> <ins>measure</ins> <ins>of</ins> <ins>the</ins> <ins>font</ins> <ins>is</ins> <ins>used</ins> <ins>for</ins> <ins>the</ins> <ins>content</ins> <ins>height.</ins>
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