admin管理员组文章数量:1241150
Sample code:
<!DOCTYPE html>
<html>
<head>
<title></title>
<script>
function on_iframe_load() {
document.getElementById('iframe_a').onload = function() {
alert('Thanks for the visit!');
};
}
</script>
</head>
<body>
<iframe name="iframe_a" id="iframe_a"></iframe>
<a href="/" target="iframe_a" onclick="on_iframe_load();">Go!</a>
</body>
</html>
It works in all major browsers with no problem, but IE8 (and probably prior versions) don't understand it.
Update: Just came up with a solution, but I'm not sure if it's right coding. Please review:
<!DOCTYPE html>
<html>
<head>
<title></title>
<script>
var clicked = false;
function activate() {
clicked = true;
}
function pop() {
if (clicked) {
alert('Thanks for the visit!');
};
}
</script>
</head>
<body>
<iframe name="iframe_a" onload="pop();"></iframe>
<a href="/" target="iframe_a" onclick="activate();">Go!</a>
</body>
</html>
Sample code:
<!DOCTYPE html>
<html>
<head>
<title></title>
<script>
function on_iframe_load() {
document.getElementById('iframe_a').onload = function() {
alert('Thanks for the visit!');
};
}
</script>
</head>
<body>
<iframe name="iframe_a" id="iframe_a"></iframe>
<a href="http://www.example./" target="iframe_a" onclick="on_iframe_load();">Go!</a>
</body>
</html>
It works in all major browsers with no problem, but IE8 (and probably prior versions) don't understand it.
Update: Just came up with a solution, but I'm not sure if it's right coding. Please review:
<!DOCTYPE html>
<html>
<head>
<title></title>
<script>
var clicked = false;
function activate() {
clicked = true;
}
function pop() {
if (clicked) {
alert('Thanks for the visit!');
};
}
</script>
</head>
<body>
<iframe name="iframe_a" onload="pop();"></iframe>
<a href="http://www.example./" target="iframe_a" onclick="activate();">Go!</a>
</body>
</html>
- What do you mean? The alert message should only appear when you click on the link, not on the initial page load. – Mori Commented Oct 16, 2012 at 8:34
- I dropped your code straight into JSFiddle disabled the libraries. Set IE9 to work in IE8 mode, and your sample works as you want. Is this 'sample' code as oppose to real problem code?( I know ie9 in ie8 mode is not a exact test) – Mesh Commented Oct 16, 2012 at 8:48
- @Adrian: No, this is the real code that I tried in real IE8, not in an emulator. – Mori Commented Oct 16, 2012 at 8:49
- Yep just tried it, if does 'fail' in a real ie8, I can get it to work using onreadystatechanged event... – Mesh Commented Oct 16, 2012 at 9:38
-
I don't think adding flag for "click" is a reliable solution. You'll better try unobtrusive way of coding in javascript (look at my edited answer). Using
attachEventfor IE andaddEventListenerfor other browsers solve your problem. – Inferpse Commented Oct 17, 2012 at 9:01
4 Answers
Reset to default 4Using inline attribute on iframe seems to fix this issue in IE8:
<!DOCTYPE html>
<html>
<head>
<title></title>
<script>
function onIframeLoad(iframe) {
if(iframe.src) {
alert('Thanks for the visit!');
}
}
function onLinkClick(url) {
document.getElementById('iframe_a').src = url;
}
</script>
</head>
<body>
<iframe id="iframe_a" onload="onIframeLoad(this);"></iframe>
<a href="http://www.example./" onclick="onLinkClick(this); return false;">Go!</a>
</body>
</html>
update by request:
You should try writing more unobtrusive javascript. Writing code in such way may prevent you from such strange bugs in IE.
<!DOCTYPE html>
<html>
<body>
<iframe id="display-frame"></iframe>
<a href="http://www.example./">Go!</a>
<script>
window.onload = function() {
var iframe = document.getElementById('display-frame'),
link = document.getElementsByTagName('a')[0];
// load handler
function onIframeLoad() {
alert('Thanks for the visit!');
}
// event handlers
if(iframe.addEventListener) iframe.addEventListener('load', onIframeLoad, false);
else if(iframe.attachEvent) iframe.attachEvent('onload', onIframeLoad);
link.onclick = function() {
iframe.src = this.href;
return false;
}
};
</script>
</body>
</html>
It seems you can't add a load listener to an iFrame in IE using the DOM property once the page has loaded.
But you can use attachEvent, so:
function on_iframe_load() {
function foo() {
alert('Thanks for the visit!');
};
var el = document.getElementById('iframe_a');
if (el.attachEvent) {
el.attachEvent('onload',foo);
} else if (el.addEventListener) {
el.addEventListener('load', 'foo', false);
}
}
I was testing in IE 6 and reversed the usual test order so that attachEvent is used in preference to addEventListener. You may want to test more recent versions of IE to see if the opposite order works and also test other IE–like browsers such as Opera.
Edit
Modified the code after testing (silly me) to use addEventListener. Here's something that works in IE and others:
function on_iframe_load() {
function foo() {
alert('Thanks for the visit!');
};
var el = document.getElementById('iframe_a');
if (el.attachEvent) {
el.attachEvent('onload',foo);
} else {
el.onload = foo;
}
}
And if you use an onload attribute in the markup, you don't need to add the listener using script.
It works :)
tested on IE8, ff, chrome
var iframe = document.getElementById('iframeid');
if (iframe .attachEvent) {
iframe .attachEvent('onload',alert("IE Iframe loaded"));
} else {
iframe .onload = alert("Other than IE Iframe loaded");
}
Just use jquery:
$(iframe).bind( 'load', function(){} );
本文标签： javascriptWhy doesn39t IE8 handle iframe onload eventsStack Overflow
版权声明：本文标题：javascript - Why doesn't IE8 handle iframe onload events? - Stack Overflow 内容由网友自发贡献，该文观点仅代表作者本人， 转载请联系作者并注明出处：http://www.betaflare.com/web/1740032648a2221309.html， 本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌抄袭侵权/违法违规的内容，一经查实，本站将立刻删除。
发表评论