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   location: https://tc39.es/ecma262/
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   <h1>About this Specification</h1>
   <p>The document at <a href="https://tc39.es/ecma262/">https://tc39.es/ecma262/</a> is the most accurate and up-to-date ECMAScript specification. It contains the content of the most recent yearly snapshot plus any <a href="https://github.com/tc39/proposals/blob/HEAD/finished-proposals.md">finished proposals</a> (those that have reached Stage&nbsp;4 in the <a href="https://tc39.es/process-document/">proposal process</a> and thus are implemented in several implementations and will be in the next practical revision) since that snapshot was taken.</p>