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[css-typed-om] Add constructor for CSSSkew with CSSAngleValues #270

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Jul 28, 2016
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[css-typed-om] Add constructor for CSSSkew with CSSAngleValues #270

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12 changes: 10 additions & 2 deletions css-typed-om/Overview.bs
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Original file line number Diff line number Diff line change
Expand Up @@ -478,7 +478,8 @@ interface CSSScale : CSSTransformComponent {
readonly attribute double z;
};

[Constructor(double ax, double ay)]
[Constructor(double dx, double dy),
Constructor(CSSAngleValue ax, CSSAngleValue ay)]
interface CSSSkew : CSSTransformComponent {
readonly attribute double ax;
readonly attribute double ay;
Expand Down Expand Up @@ -518,14 +519,21 @@ and y & z values of 0 could be:
</div>

When a {{CSSRotation}} is constructed with a double (as opposed to a
{{CSSAngleValue}}), the angle is taken to be in degrees.
{{CSSAngleValue}}), the angle is taken to be in degrees. Likewise, when
{{CSSSkew}} is constructed with doubles, both arguments are taken to be angles
in degrees.

<div class=note>
The following two CSSRotations are equivalent:
<pre class='lang-javascript'>
CSSRotation(angle);
CSSRotation(CSSAngleValue(angle, "deg"));
</pre>
Likewise, the following two CSSSkews are equivalent:
<pre class='lang-javascript'>
CSSSkew(ax, ay);
CSSSkew(CSSAngleValue(ax, "deg"), CSSAngleValue(ay, "deg"));
</pre>
</div>

When a {{CSSTransformValue}} is read from a {{StylePropertyMap}}, each
Expand Down