pointerenter and pointerleave should not be composed (#261)

* pointerenter and pointerleave should not be composed

index.html

@@ -493,7 +493,8 @@ <h3>Attributes and Default Actions</h3>
                             </tbody>
                         </table>
 
-                        <p>For all pointer events in the table above, <code>composed</code> ([[!DOM4]]) attribute SHOULD be <code>true</code> and <a href="https://www.w3.org/TR/uievents/#widl-UIEvent-detail"><code>detail</code></a> [[!UIEVENTS]] attribute SHOULD be 0.</p>
+                        <p>For all pointer events in the table above except <code>pointerenter</code> and <code>pointerleave</code> the <code>composed</code> ([[!DOM4]]) attribute SHOULD be <code>true</code>.
+                           For all pointer events in the table above the <a href="https://www.w3.org/TR/uievents/#widl-UIEvent-detail"><code>detail</code></a> [[!UIEVENTS]] attribute SHOULD be 0.</p>
                         <div class="note">Many user agents expose non-standard attributes <code>fromElement</code> and <code>toElement</code> in MouseEvents to support legacy content.  In those user agents, the values of those (inherited) attributes in PointerEvents must be <code>null</code> to encourage the use of the standardized alternates (i.e. <code>target</code> and <code>relatedTarget</code>).</div>
                         <p>Similar to the <a href="https://www.w3.org/TR/uievents/#interface-mouseevent">MouseEvents</a> [[!UIEVENTS]] the <code>relatedTarget</code> should be initialized to the element whose bounds the pointer just left (in the case of a <code>pointerover</code> or <code>pointerenter</code> event) or the element whose bounds the pointer is entering (in the case of a <code>pointerout</code> or <code>pointerleave</code>). For other pointer events, this value will default to null. Note that when an element receives the pointer capture all the following events for that pointer are considered to be inside the boundary of the capturing element.</p>
                         <p>For <code>gotpointercapture</code> and <code>lostpointercapture</code> all the attributes except the ones defined in the table above should be the same as the Pointer Event that caused the user agent to run <a href="#process-pending-pointer-capture">Process Pending Pointer Capture</a> and fire the <code>gotpointercapture</code> and <code>lostpointercapture</code> events.</p>