[css-values-4][editorial] Add CanIUse panels. w3c#1258

Author: tabatkins

css-values-4/Overview.bs

@@ -19,6 +19,7 @@ Ignored Terms: <spacing-limit>, containing block, property
 Ignored Vars: Cn+1, n
 Inline Github Issues: no
 Default Highlight: css
+Include Can I Use Panels: yes
 </pre>
 <pre class='link-defaults'>
 spec: css-backgrounds-3; type: type; text: <position>
@@ -1709,7 +1710,7 @@ Font-relative Lengths: the ''em'', ''rem'', ''ex'', ''rex'', ''cap'', ''rcap'',
 				will be 20% greater than the computed font size inherited by <code>h1</code> elements.
 			</div>
 
-		<dt><dfn id="rem" lt="rem">rem unit</dfn>
+		<dt><dfn id="rem" lt="rem" caniuse="rem">rem unit</dfn>
 		<dd>
 			Equal to the computed value of the ''em'' unit on the root element.
 
@@ -1775,7 +1776,7 @@ Font-relative Lengths: the ''em'', ''rem'', ''ex'', ''rex'', ''cap'', ''rcap'',
 		<dd>
 			Equal to the value of the ''cap'' unit on the root element.
 
-		<dt><dfn id="ch" lt="ch">ch unit</dfn>
+		<dt><dfn id="ch" lt="ch" caniuse="ch-unit">ch unit</dfn>
 		<dd>
 			Represents the typical <a>advance measure</a> of European alphanumeric characters,
 			and measured as the used <a>advance measure</a> of the “0” (ZERO, U+0030) glyph
@@ -1935,7 +1936,7 @@ Font-relative Lengths: the ''em'', ''rem'', ''ex'', ''rex'', ''cap'', ''rcap'',
    ███     ███  ███  ██       ████████    ██     ██████
 -->
 
-<h4 id="viewport-relative-lengths">
+<h4 id="viewport-relative-lengths" caniuse="viewport-units">
 Viewport-percentage Lengths: the ''*vw'', ''*vh'', ''*vi'', ''*vb'', ''*vmin'', ''*vmax'' units</h4>
 
 	The <dfn export>viewport-percentage lengths</dfn> are relative to the size of the
@@ -2783,7 +2784,7 @@ Functional Notations</h2>
  ██████  ██     ██ ████████  ██████    ███ ███
 -->
 
-<h2 id="math" oldids="calc-notation">
+<h2 id="math" oldids="calc-notation" caniuse="calc">
 Mathematical Expressions</h2>
 
 	The <dfn export lt="math function">math functions</dfn>