Hi Francis.
Francis Hemsher:
> I would go this way in one coding block:
>
> myElement.setAttribute("onclick","myClickFunction()")
> myElement.setAttribute("onmouseover","myMouseOver()")
> myElement.setAttribute("onmouseout","myMouseOut()")
> ...etc.
>
> To dynamically dump them:
>
> myElement.removeAttribute("onclick")
> myElement.removeAttribute("onmouseover")
> myElement.removeAttribute("onmouseout")
No, I mean more than one event listener for the same event.
function doSomething() {
// ...
}
function doSomethingElse() {
// ...
}
myElement.addEventListener
("click", doSomething, false);
myElement.addEventListener
("click", doSomethingElse, false);
// when clicked, doSomething() is called then doSomethingElse() is
// called
// ...
myElement.removeEventListener("click", doSomething, false);
// now when clicked, only doSomethingElse() is called
> > - You can add capturing event listeners with addEventListener,
> > but the onXXX attributes define only non-capturing event
> listeners.
>
>
> Can you show me an example of the above? Believe me, I'm glad to
> learn new techniques.
document.documentElement.addEventListener("click", blah, true);
The 'blah' function is now a capturing event listener (because I passed
true as the third argument), which means that it will be called for a
click event on any element in the document (because it has been added to
the root svg element, here) before it actually gets to the target.
If blah was:
function blah(evt) {
evt.stopPropagation();
}
then the click event won't even get to its target.
Have a read about event flow, bubbling and capturing here:
http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-flow-basic
Cameron
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