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String substr()

This feature is discouraged — TC39 included substr() in Annex B of the ECMAScript specification, which covers JavaScript features with "one or more undesirable characteristics and in the absence of legacy usage would be removed."

For more information, see: https://tc39.es/ecma262/multipage/additional-ecmascript-features-for-web-browsers.html#sec-additional-ecmascript-features-for-web-browsers

The substr() method of strings returns part of a string, starting from an index and ending a given number of characters after.

Browser support

  • Chrome 1 Released on 2008-12-11
  • Chrome Android 18 Released on 2012-06-27
  • Edge 12 Released on 2015-07-29
  • Firefox 1 Released on 2004-11-09
  • Firefox for Android 4 Released on 2011-03-29
  • Safari 1 Released on 2003-06-23
  • Safari on iOS 1 Released on 2007-06-29

MDN documentation

No MDN documentation found.

Specifications

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