Master JavaScript's forEach Method: Complete Guide & Polyfill Tutorial | Silicon Valley Blog

#javascript #polyfill #foreachloop

The forEach() method of Array instances executes a provided function once for each array element
A polyfill is a piece of computer code written to implement a feature in
a browser that does not yet support it. It could be because of the older version of the browser you are using, or
because the new version of the browser does not have that feature.

Syntax

forEach(callbackFn)

forEach(callbackFn, thisArg)

Parameters

callbackFn

A function to execute for each element in the array. Its return value is discarded. The function
is called with the following arguments:

element
The current element being processed in the array.

array
The array forEach() was called upon.

thisArg Optional
A value to use as this when executing callbackFn.

Return value
None (undefined)