Function.prototype.apply

Calls the function, substituting the specified object for the this value of the function, and the specified array for the arguments of the function.

Syntax

apply(thisArg, args?)

Parameters

• thisArg

  The object to be used as the this object.

• args

  An array of arguments to be passed to the function.

Return value

The result of calling the function.

Examples

function sum(a, b) {
  return a + b
}
sum.apply(null, [1, 2])

3

let slice = Array.prototype.slice
let arr = ["one", "two", "three"]
slice.apply(arr, [0, 1])

["one"]