Polyfill (programming): Difference between revisions

Revision as of 10:00, 15 January 2021

Revision as of 10:19, 22 May 2021

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{{other uses|Polyfill (disambiguation)}}

{{short description|Code to implement features in web browsers that do not support them}}

In [[web development]], a '''polyfill''' is code that implements a feature on [[web browser]]s that do not support the feature. Most often, it refers to a [[JavaScript]] [[Library (computing)|library]] that implements an [[HTML5]] or [[CSS]] [[web standard]], either an established standard (supported by some browsers) on older browsers, or a proposed standard (not supported by any browsers) on existing browsers. Formally, "a polyfill is a [[Shim (computing)|shim]] for a browser [[Application programming interface|API]]".<ref name="speakingjs">{{cite book|title=Speaking JavaScript |url=http://speakingjs.com/ |author=Luis Ángel Pérez Castillo |year=2019}}</ref>