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POWhat is the best way to detect websocket support using Javascript?
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copied!<p>I'm trying to use Javascript to detect if a web browser supports websockets, but using only feature-based detection, I'm getting false positives, so I added a user agent test to throw out Android devices instead, which I'm not happy about. I have a Samsung Galaxy Tab 2, and here's my detection code:</p> <pre><code>var isSupported = (("WebSocket" in window && window.WebSocket != undefined) || ("MozWebSocket" in window)); /* This line exists because my Galaxy Tab 2 would otherwise appear to have support. */ if (isSupported && navigator.userAgent.indexOf("Android") > 0) isSupported = false; if (isSupported) document.write("Your browser supports websockets"); else document.write("Your browser does not support websockets"); </code></pre> <p>This code seems to work with IE, Firefox, Safari (including iPhone/iPad), and Chrome. However, the feature-based check is returning true when I use the default browser of my Samsung Galaxy Tab 2, which is incorrect because that browser does not actually support websockets. Furthermore, I don't know how many other Android devices have this same issue, so at the moment, this is the best solution I'm aware of for detection. </p> <p>Is there a better way to detect websocket support other than what I'm doing? I do realize that workarounds exist for Android, such as using a different browser, which means my user agent detection code as-is would not be a good thing. My goal is to not have to rely on the user agent in the first place.</p> <p>Any suggestions?</p>

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