[css-transitions-2] Drop CSSTransition constructor

Author: birtles

css-transitions-2/Overview.bs

@@ -97,8 +97,8 @@ The <dfn>owning element</dfn> of a transition refers to the element or
 pseudo-element to which the 'transition-property' property was applied that
 generated the animation.
 
-If a transition was generated directly by script (e.g. using the
-{{CSSTransition}} constructor) then it has no <a>owning element</a>.
+If a transition was generated directly by script then it has no <a>owning
+element</a>.
 
 If a transition generated using the markup defined in this specification is
 later disassociated from that markup because it is cancelled or replaced by
@@ -112,9 +112,9 @@ cancel an animation).
 
 ## Animation composite order ## {#animation-composite-order}
 
-<a spec='web-animations'>Animations</a> generated from the markup and
-interfaces (e.g. the {{CSSTransition}} constructor) defined in this
-specification have an <a>animation class</a> of &lsquo;CSS Transition&rsquo;.
+<a spec='web-animations'>Animations</a> generated from the markup defined in
+this specification have an <a>animation class</a> of &lsquo;CSS
+Transition&rsquo;.
 
 CSS Transitions have an <em>earlier</em> composite order that CSS Animations
 and animations without a specific <a>animation class</a>.
@@ -165,9 +165,6 @@ Note, this behavior relies on the fact that disassociating a transition
 from its <a>owning element</a> always causes it to enter (or remain) in the
 <a>idle play state</a>.
 
-Transitions created using the {{CSSTransition}} constructor are appended
-to the <a>global animation list</a> at the moment they are constructed.
-
 # Transition Events # {#transition-events}
 
 ## Event dispatch ## {#event-dispatch}
@@ -362,53 +359,6 @@ interface CSSTransition : Animation {
 :   <dfn attribute for=CSSTransition>transitionProperty</dfn>
 ::  The <a>expanded transition property name</a> of this transition.
 
-<div class="issue">
-
-This interface needs a constructor. Perhaps something like the following,
-
-<pre class="idl">
-partial interface CSSTransition {
-  constructor(Animatable? target,
-              CSSOMString transitionProperty,
-              any transitionValue,
-              optional (unrestricted double or KeyframeEffectOptions) options);
-  constructor(Animatable? target,
-              CSSOMString transitionProperty,
-              any transitionValue,
-              (unrestricted double or KeyframeEffectOptions) options,
-              AnimationTimeline? timeline);
-};
-</pre>
-
-Using <code>any</code> as the type for <code>transitionValue</code> would allow
-the following usage:
-
-<pre class="example lang-javascript">
-  var transition = new CSSTransition(elem, 'opacity', 1, 2000);
-  transition.play();
-</pre>
-
-The above example, however, is <em>not</em> equivalent to triggering a
-transition. It has the following differences:
-
-*   It does not update the specified style.
-*   It would not cancel any existing transition on the given property unless
-    we add special wording to that effect.
-*   It would exhibit different composite order to a regular transition
-    (this should be easily fixed, however).
-*   It has been suggested that <a
-    href="https://github.com/w3c/web-animations/issues/62#issuecomment-117357703">script-generated
-    animations should not apply to the transition level of the cascade</a>.
-
-It is unclear how much we should extend the {{CSSTransition}} constructor to
-overcome the above limitations so that it can be used to generate transitions
-programmatically, or whether we should introduce a separate helper method such
-as has been <a
-href="https://lists.w3.org/Archives/Public/www-style/2011Mar/0729.html">suggested
-elsewhere</a>.
-
-</div>
-
 ## Requirements on pending style changes ## {#requirements-on-pending-style-changes}
 
 Various operations may affect the <a lt="computed value">computed values</a> of