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Everything about Polyfill (programming)

Code to implement features in web browsers that do not support them

In software development, a polyfill is code that implements a new standard feature of a deployment environment within an old version of that environment that does not natively support the feature. Most often, it refers to JavaScript or WebAssembly code that implements an HTML5 or CSS web standard, either an established standard on older browsers, or a proposed standard on existing browsers. Polyfills are also used in PHP and Python. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: Polyfill (programming)A 5-minute orientation
  2. Pick up a classic book: Building PolyfillsThe most-reprinted book on the subject
  3. Go sideways: ModernizrA closely related topic
  4. Go sideways: CSS hackA closely related topic

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