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How to create a JavaScript callback for knowing when an image is loaded?
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Image.onload() will often work.
To use it, you'll need to be sure to bind the event handler before you set the src attribute.
Related Links:
Mozilla on Image.onload()
Example Usage:
window.onload = function () {
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Trying to fire the onload event on script tag
I'm trying to load a set of scripts in order, but the onload event isn't firing for me.
1 Answer
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How to execute a function when page has fully loaded?
... so, just to clarify (if I may), comparing to DOM ready, window.onload is called when every page component/resourse (i.e. *including *images). Am I right?
– BreakPhreak
Jun 22 '11 at 9:21
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Is there a cross-browser onload event when clicking the back button?
For all major browsers (except IE), the JavaScript onload event doesn’t fire when the page loads as a result of a back button operation — it only fires when the page is first loaded.
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Check image width and height before upload with Javascript
...w Image();
var objectUrl = _URL.createObjectURL(file);
img.onload = function () {
alert(this.width + " " + this.height);
_URL.revokeObjectURL(objectUrl);
};
img.src = objectUrl;
}
});
Demo: http://jsfiddle.net/4N6D9/1/
I take it you real...
Make iframe automatically adjust height according to the contents without using scrollbar? [duplicat
... your iframe to this:
<iframe src="..." frameborder="0" scrolling="no" onload="resizeIframe(this)" />
As found on sitepoint discussion.
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Is onload equal to readyState==4 in XMLHttpRequest?
... so much different between onreadystatechange --> readyState == 4 and onload, is it true?
3 Answers
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How do you automatically set the focus to a textbox when a web page loads?
...oad', function() {
$("Box1").focus();
});
or plain javascript:
window.onload = function() {
document.getElementById("Box1").focus();
};
though keep in mind that this will replace other on load handlers, so look up addLoadEvent() in google for a safe way to append onload handlers rather than...
image.onload event and browser cache
... an image is loaded, but if the image is saved in the browser cache, the .onload event will not be fired.
5 Answers
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Javascript - How to detect if document has loaded (IE 7/Firefox 3)
...d, then I can attach an event listener. I can't add an eventlistener after onload has already fired since it won't get called. So how can I check if the document has loaded? I tried the code below but it doesn't entirely work. Any ideas?
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