Function.prototype.apply() - JavaScript | MDN

Warning: Do not use apply() to chain constructors (for example, to implement inheritance). This invokes the constructor function as a plain function, which means new.target is undefined, and classes throw an error becaus

Array.prototype.push()

In this case, you can use apply to implicitly "spread" an array as a series of arguments.

Array.prototype.concat()

In this case, you can use apply to implicitly "spread" an array as a series of arguments.

Using apply() and built-in functions

Clever usage of apply() allows you to use built-in functions for some tasks that would probably otherwise require manually looping over a collection (or using the spread syntax).

Using apply() and built-in functions

Clever usage of apply() allows you to use built-in functions for some tasks that would probably otherwise require manually looping over a collection (or using the spread syntax).

Function.prototype.bind()

Function.prototype.call()

Spread syntax (...)

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This page was last modified on Jul 10, 2025 by MDN contributors.

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Function.prototype.apply() - JavaScript | MDN

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