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POWhy isn't popstate triggered in Safari when an iframe is loading?
 

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  1. POWhy isn't popstate triggered in Safari when an iframe is loading?
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    <p>In Safari, if there's an <code>iframe</code> loading, and the user changes the history state by going back or forward, the <code>popstate</code> event isn't triggered, causing the application state and the window location to be out of sync.</p> <p>I think that an active XHR request will cause the same behavior, but I haven't been able to confirm that yet.</p> <p>Here's a jsfiddle that will allow you to easily reproduce the issue: <a href="http://jsfiddle.net/neonsilk/muHk8/" rel="nofollow">http://jsfiddle.net/neonsilk/muHk8/</a></p> <p>You just have to click the links/buttons in order, from 1 to 6.</p> <p>In Safari 5.0.5, the output is:</p> <p>(reverse chronological, the important part is the state comparison at the top)</p> <pre><code>[1305665493096] / [1305665493096] vs [1305665493096] /node --------------- [1305665489955] iframe loaded --------------- [1305665489806] (did popstate or $.address change trigger?) [1305665489805] called history.back() [1305665489805] appended iframe --------------- [1305665488428] popstate: /node [1305665488427] $.address change: /node --------------- [1305665487821] popstate: / [1305665487821] $.address change: / --------------- [1305665487179] $.address change: /node --------------- [1305665486606] $.address change: / --------------- [1305665485732] iframe loaded --------------- [1305665485569] $.address change: /neonsilk/muHk8/show/ [1305665485568] $.address init </code></pre> <p>Yet in Chrome (11) or FireFox (4.0), the output looks like:</p> <p>(note that the states are in sync)</p> <pre><code>[1305665609499] / [1305665609499] vs [1305665609499] / --------------- [1305665608360] iframe loaded --------------- [1305665607770] popstate: / [1305665607770] $.address change: / [1305665607758] (did popstate or $.address change trigger?) [1305665607758] called history.back() [1305665607758] appended iframe --------------- [1305665606870] popstate: /node [1305665606869] $.address change: /node --------------- [1305665606150] popstate: / [1305665606149] $.address change: / --------------- [1305665605551] $.address change: /node --------------- [1305665604808] $.address change: / --------------- [1305665603354] iframe loaded --------------- [1305665602688] $.address change: /neonsilk/muHk8/show/ [1305665602682] $.address init [1305665602676] popstate: /neonsilk/muHk8/show/ </code></pre> <p>Is this a bug in Safari? And if it is, has anyone discovered a workaround?</p> <p>(It's also interesting that both FireFox and Chrome fire a <code>popstate</code> event on page load.)</p>
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