On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Bun version 1.0.0 on 2023-09-08
In Chrome version 45 on 2015-09-01
In Chrome Android version 45 on 2015-09-01
In Deno version 1.0 on 2020-05-13
In Edge version 12 on 2015-07-29
In Firefox version 22 on 2013-06-25 Note: The initial implementation of arrow functions in Firefox made them automatically strict. This has been changed as of Firefox 24. The use of 'use strict'; is now required. Before Firefox 39, a line terminator (\n) was incorrectly allowed after arrow function arguments. This has been fixed to conform to the ES2015 specification and code like () \n => {} will now throw a SyntaxError in this and later versions.
In Firefox for Android version 22 on 2013-06-25 Note: The initial implementation of arrow functions in Firefox for Android made them automatically strict. This has been changed as of Firefox for Android 24. The use of 'use strict'; is now required. Before Firefox for Android 39, a line terminator (\n) was incorrectly allowed after arrow function arguments. This has been fixed to conform to the ES2015 specification and code like () \n => {} will now throw a SyntaxError in this and later versions.
Not in Internet Explorer
In Node.js version 4.0.0 on 2015-09-08
In Quest Browser version 5.0 on undefined
In Opera version 32 on 2015-09-15
In Opera Android version 32 on 2015-09-23
In Safari version 10 on 2016-09-20
In Safari on iOS version 10 on 2016-09-13
In Samsung Internet version 5.0 on 2016-12-15
In WebView Android version 45 on 2015-09-01
In WebView on iOS version 10 on 2016-09-13