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    <h2>window.onload</h2> <p><strong>When do they fire?</strong></p> <p><a href="https://developer.mozilla.org/en-US/docs/Web/API/GlobalEventHandlers.onload" rel="noreferrer">window.onload</a></p> <ul> <li>By default, it is fired when the entire page loads, including its content (images, css, scripts, etc.)</li> <li>In some browsers it now takes over the role of document.onload and fires when the DOM is ready as well.</li> </ul> <p>document.onload</p> <ul> <li>It is called when the DOM is ready which can be prior to images and other external content is loaded.</li> </ul> <p><strong>How well are they supported?</strong></p> <p>window.onload appears to be the most widely supported. In fact, some of the most modern browsers have in a sense replaced document.onload with window.onload. Browser support issues are most likely the reason why many people are starting to use libraries such as <a href="http://jquery.com/" rel="noreferrer">jQuery</a> to handle the checking for the document being ready like so:</p> <pre><code>$(document).ready(function() { /* code here */ }); $(function() { /* code here */ }); </code></pre> <hr> <p>For the purpose of history:</p> <p><strong>window.onload vs body.onload</strong></p> <p>As a note, a similar question was asked on <a href="http://www.codingforums.com/archive/index.php/t-106229.html" rel="noreferrer">codingforums</a> a while back regarding the usage of <code>window.onload</code> over <code>body.onload</code>. The result seemed to be that you should use <strong>window.onload</strong> because it is good to separate your structure from the action.</p>
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    1. COActually that statement seems to be directed at a choice between `window.onload` and `<body onload="">` which is completely different (and the "separate structure from action" makes a lot more sense in this context). Not that the answer is wrong, but the basis of it is.
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    2. COThat quote is grammatically horrible... shouldn't some (marked) editing help?
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    3. CO@Thor84no I finally found the time to look take another look at this. I have made a few improvements.
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