Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
922 views
in Technique[技术] by (71.8m points)

dom - is there an alternative to DOMAttrModified that will work in webkit

I need to leverage this DOM event. IE has onpropertychange, which does what I need it to do also. Webkit doesn't seem to support this event, however. Is there an alternative I could use?

Question&Answers:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

Although Chrome does not dispatch DOMAttrModified events, the more lightweighted mutation observers are supported since 2011 and these work for attribute changes, too.

Here is an example for the document body:

var element = document.body, bubbles = false;

var observer = new WebKitMutationObserver(function (mutations) {
  mutations.forEach(attrModified);
});
observer.observe(element, { attributes: true, subtree: bubbles });

function attrModified(mutation) {
  var name = mutation.attributeName,
    newValue = mutation.target.getAttribute(name),
    oldValue = mutation.oldValue;

  console.log(name, newValue, oldValue);
}

For a simple attribute change, the console.log statement would print:

<body color="black">
<script type="text/html">
document.body.setAttribute("color", "red");
</script>
</body>

Console:

> color red black


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...