[css-grid] Replace collapsing tracks issue, requesting feedback.

Author: fantasai

css-grid/Overview.html

@@ -105,8 +105,9 @@ <h2 class="no-num no-toc no-ref" id=contents><span class=content>Table of conten
 Grid Areas</a></ul><li><a href=#grid-model><span class=secno>3</span>
 Grid Layout Box Model</a><ul class=toc><li><a href=#grid-containers><span class=secno>3.1</span>
 Grid Containers: the <span data-link-type=value>grid</span> and <span class=css data-link-type=maybe>inline-grid</span> <span class=property data-link-type=propdesc title=display>display</span> values</a></ul><li><a href=#grid-items><span class=secno>4</span>
-Grid Items</a><ul class=toc><li><a href=#order-property><span class=secno>4.1</span>
-Reordered Grid Items: the <span class=property data-link-type=propdesc title=order>order</span> property</a><li><a href=#static-position><span class=secno>4.2</span>
+Grid Items</a><ul class=toc><li><a href=#visibility-collapse><span class=secno>4.1</span>
+	Collapsed Grid Items: the <span class=property data-link-type=propdesc title=visibility>visibility</span> property</a><li><a href=#order-property><span class=secno>4.2</span>
+Reordered Grid Items: the <span class=property data-link-type=propdesc title=order>order</span> property</a><li><a href=#static-position><span class=secno>4.3</span>
 Static Position of Grid Container Children</a></ul><li><a href=#grid-definition><span class=secno>5</span>
 The Explicit Grid</a><ul class=toc><li><a href=#track-sizing><span class=secno>5.1</span>
 Track Sizing: the <span class=property data-link-type=propdesc title=grid-template-rows>grid-template-rows</span> and <span class=property data-link-type=propdesc title=grid-template-columns>grid-template-columns</span> properties</a><ul class=toc><li><a href=#named-lines><span class=secno>5.1.1</span>
@@ -755,15 +756,25 @@ <h3 id="position-grid">
 		and missing names are treated as <a value for="<grid-line>">auto</a>.
 -->
 
-<h3 data-level=4.1 id=order-property><span class=secno>4.1 </span><span class=content>
+<h3 data-level=4.1 id=visibility-collapse><span class=secno>4.1 </span><span class=content>
+	Collapsed Grid Items: the <a class=property data-link-type=propdesc href=http://www.w3.org/TR/CSS21/visufx.html#propdef-visibility title=visibility>visibility</a> property</span><a class=section-link href=#visibility-collapse>§</a></h3>
+
+	<p class=issue>
+		We want the ability to collapse grid tracks
+		(similar to <a href=http://www.w3.org/TR/css3-flexbox/#visibility-collapse>collapsing flex items</a>
+		 or <a href=http://www.w3.org/TR/CSS21/tables.html#dynamic-effects>table rows/columns</a>),
+		but we're not sure exactly how to do it.
+		Ideas welcome, please <a href="mailto:www-style@w3.org?Subject=%5Bcss-grid%5D%20Collapsing%20Grid%20Tracks">post them to www-style@w3.org</a>.
+
+<h3 data-level=4.2 id=order-property><span class=secno>4.2 </span><span class=content>
 Reordered Grid Items: the <a class=property data-link-type=propdesc href=http://dev.w3.org/csswg/css-flexbox-1/#propdef-order title=order>order</a> property</span><a class=section-link href=#order-property>§</a></h3>
 
 	<p>
 		The <a class=property data-link-type=propdesc href=http://dev.w3.org/csswg/css-flexbox-1/#propdef-order title=order>order</a> property also applies to <a href=#grid-item>grid items</a>.
 		It affects their <a href=#grid-auto-flow-property>auto-placement</a> and <a href=#z-order>painting order</a>.
 
 
-<h3 data-level=4.2 id=static-position><span class=secno>4.2 </span><span class=content>
+<h3 data-level=4.3 id=static-position><span class=secno>4.3 </span><span class=content>
 Static Position of Grid Container Children</span><a class=section-link href=#static-position>§</a></h3>
 
 	<p>
@@ -2652,8 +2663,9 @@ <h2 class=no-num id=changes><span class=content>
 		<li>Percentages are no longer resolved like they are in table layout.
 		<li><a href=#auto-margins>Margin alignment</a> now matches <a href=http://www.w3.org/TR/css3-flexbox>Flexbox</a> and <a href=http://www.w3.org/TR/css3-align>Box Alignment</a>.
 		<li>Renamed all the <a href=#placement>placement properties</a> and <a href=#grid-definition>grid-defining properties</a>.
-		<li>Added the <a class=property data-link-type=propdesc href=#propdef-grid-template title=grid-template>grid-template</a> shorthand for all the grid-defining properties.
+		<li>Added the <a class=property data-link-type=propdesc href=#propdef-grid-template title=grid-template>grid-template</a> and <a class=property data-link-type=propdesc href=#propdef-grid title=grid>grid</a> shorthands.
 		<li>Refined <a href=#abspos-items>definitions of absolutely-positioned elements</a> whose containing block is a grid container.
+		<li>Defined the <a href=#static-position>static position</a> of direct children of a <a href=#grid-container>grid container</a>.
 		<li>Marked <a href=#visibility-collapse>grid row/column collapsing</a> as an open issue.
 		<li>Changed the syntax of <a href=#named-lines>named lines</a> to use parentheses and identifiers rather than strings.
 		<li>Removed the "none" value from <a class=property data-link-type=propdesc href=#propdef-grid-auto-flow title=grid-auto-flow>grid-auto-flow</a>, turning auto-placement on by default so that grid items by default don't stack on top of each other.

css-grid/Overview.src.html

@@ -669,6 +669,16 @@ <h3 id="position-grid">
 		and missing names are treated as <a value for="<grid-line>">auto</a>.
 -->
 
+<h3 id="visibility-collapse">
+	Collapsed Grid Items: the 'visibility' property</h3>
+
+	<p class='issue'>
+		We want the ability to collapse grid tracks
+		(similar to <a href="http://www.w3.org/TR/css3-flexbox/#visibility-collapse">collapsing flex items</a>
+		 or <a href="http://www.w3.org/TR/CSS21/tables.html#dynamic-effects">table rows/columns</a>),
+		but we're not sure exactly how to do it.
+		Ideas welcome, please <a href="mailto:www-style@w3.org?Subject=%5Bcss-grid%5D%20Collapsing%20Grid%20Tracks">post them to www-style@w3.org</a>.
+
 <h3 id='order-property'>
 Reordered Grid Items: the 'order' property</h3>
 
@@ -2709,8 +2719,9 @@ <h2 class="no-num" id="changes">
 		<li>Percentages are no longer resolved like they are in table layout.
 		<li><a href="#auto-margins">Margin alignment</a> now matches <a href="http://www.w3.org/TR/css3-flexbox">Flexbox</a> and <a href="http://www.w3.org/TR/css3-align">Box Alignment</a>.
 		<li>Renamed all the <a href="#placement">placement properties</a> and <a href="#grid-definition">grid-defining properties</a>.
-		<li>Added the 'grid-template' shorthand for all the grid-defining properties.
+		<li>Added the 'grid-template' and 'grid' shorthands.
 		<li>Refined <a href="#abspos-items">definitions of absolutely-positioned elements</a> whose containing block is a grid container.
+		<li>Defined the <a href="#static-position">static position</a> of direct children of a <i>grid container</i>.
 		<li>Marked <a href="#visibility-collapse">grid row/column collapsing</a> as an open issue.
 		<li>Changed the syntax of <a href="#named-lines">named lines</a> to use parentheses and identifiers rather than strings.
 		<li>Removed the "none" value from 'grid-auto-flow', turning auto-placement on by default so that grid items by default don't stack on top of each other.