I'm looking for the implementation of the native Javascript functions like: Array.prototype.concat(), Document.getElementsByClassName(), etc.
Just curious how they are implemented?
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3Mozilla have a nice reference developer.mozilla.org/en-US/docs/Web/JavaScript/ReferenceCraicerjack– Craicerjack2015-10-22 16:55:23 +00:00Commented Oct 22, 2015 at 16:55
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3@Craicerjack That's a great reference for describing how to use them, but it doesn't say how they're implemented. If I understand the OP's question correctly, they're actually looking for the C code written for each browser to act out this functionality (given that Chromium and Gecko are open source, it must be somewhere)Katana314– Katana3142015-10-22 16:59:22 +00:00Commented Oct 22, 2015 at 16:59
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1 Answer
You will probably want to look at the JS engine source code, which may or may not be open source. Chrome's V8 for example, is open source: https://code.google.com/p/v8/source/browse
But keep in mind that's likely going to be c or c++.
As someone else already mentioned, if you want more of an algorithmic description for how something like getElementsByClassName works, try the Mozilla network.
