polyfill

A polyfill, also called a pollyfiller, is a small piece of JavaScript code that will mimic the API of a newer browser to provide functionality for an older browser. Such code may also be called a shim. In construction, a shim is a thin piece of wood or other material that can be used to fill a gap.

A polyfill, also called a pollyfiller, is a small piece of JavaScript code that will mimic the application program interface (API) of a newer browser to provide functionality for an older browser.

This was first published in May 2012

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