Friday, November 13, 2015

Shim and Polyfill

Shim intercepts API calls and creates an abstract layer between the caller and the target. It is more like an adapter. e.g. es5-shim provides API which adapts to old new Date().getTime() API.

Polyfilling is really just a specialized version of shimming. Polyfill is about implementing missing features in an API. e.g. location.origin which is not available on IE 10.

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