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Reflect.apply()

main Documentación oficial Licencia CC-BY-SA-2.5Descargado el 2026-08-02

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The Reflect.apply() static method calls a target function with arguments as specified.

{{InteractiveExample("JavaScript Demo: Reflect.apply()", "taller")}}

```js interactive-example console.log(Reflect.apply(Math.floor, undefined, [1.75])); // Expected output: 1

console.log( Reflect.apply(String.fromCharCode, undefined, [104, 101, 108, 108, 111]), ); // Expected output: "hello"

console.log( Reflect.apply(RegExp.prototype.exec, /ab/, ["confabulation"]).index, ); // Expected output: 4

console.log(Reflect.apply("".charAt, "ponies", [3])); // Expected output: "i"

## Syntax

```js-nolint
Reflect.apply(target, thisArgument, argumentsList)

Parameters#

  • target
  • : The target function to call.
  • thisArgument
  • : The value of this provided for the call to target.
  • argumentsList
  • : An array-like object specifying the arguments with which target should be called.

Return value#

The result of calling the given target function with the specified this value and arguments.

Exceptions#

  • {{jsxref("TypeError")}}
  • : Thrown if target is not a function or argumentsList is not an object.

Description#

Reflect.apply() provides the reflective semantic of a function call. That is, Reflect.apply(target, thisArgument, argumentsList) is semantically equivalent to:

Math.floor.apply(null, [1.75]);
Reflect.apply(Math.floor, null, [1.75]);

The only differences are:

  • Reflect.apply() takes the function to call as the target parameter instead of the this context.
  • Reflect.apply() throws if argumentsList is omitted instead of defaulting to calling with no parameters.

Reflect.apply() invokes the [[Call]] object internal method of target.

Examples#

Using Reflect.apply()#

Reflect.apply(Math.floor, undefined, [1.75]);
// 1;

Reflect.apply(String.fromCharCode, undefined, [104, 101, 108, 108, 111]);
// "hello"

Reflect.apply(RegExp.prototype.exec, /ab/, ["confabulation"]).index;
// 4

Reflect.apply("".charAt, "ponies", [3]);
// "i"

Specifications#

{{Specifications}}

Browser compatibility#

{{Compat}}

See also#