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JavaScript
Laura Harker edited this page Feb 27, 2020
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By default, Closure compiler supports JavaScript as specified in Ecma-262, edition 10 (ECMAScript 2019).
Support for ECMAScript 2020 features is in progress.
Here are some pages that we find useful for understanding the language:
- Mozilla's Core JavaScript Reference
- Differences between IE's JScript implementation and JavaScript (PDF)
Using the command-line options --language_in, the compiler can be switched to accept any version of ECMAScript down to Ecma-262, edition 3 (ECMAScript 3) (PDF). See the flags page for a full list of supported --language_in values.