Web features explorer - Hashbang comments

Web features explorer

Tags: javascript Groups: JavaScript

The #! comment at the absolute start of a script or module is treated as a normal comment and is ignored by the JavaScript engine.

Learning resources on MDN

Hashbang_comments, in Lexical grammar

Browser support

Chrome 74 Released on 2019-04-23
Chrome Android 74 Released on 2019-04-24
Edge 79 Released on 2020-01-15
Firefox 67 Released on 2019-05-21
Firefox for Android 67 Released on 2019-05-21
Safari 13.1 Released on 2020-03-24
Safari on iOS 13.4 Released on 2020-03-24

Specifications

ECMAScript Language Specification (#sec-hashbang), from TC39 (Ecma International).

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