March 2017
Beginner to intermediate
868 pages
18h 52m
English
A polyfill is a JavaScript library that replicates an API feature for the browsers that don't have it natively. Usually, a polyfill doesn't add its own API or additional features; it just adds the missing feature.
Polyfills are available for almost every HTML5 and CSS3 feature, but this doesn't mean that we can start adding libraries to provide all the modern features in the web browser. Also, the modern features can conflict with each other, so polyfills must be included carefully. To support SVG in those browsers, the following two polyfills can be used:
Read now
Unlock full access