The forEach() method of TypedArray instances executes a provided function once for each typed array element. This method has the same algorithm as Array.prototype.forEach.

Syntax

forEach(callbackFn)
forEach(callbackFn, thisArg)

Parameters

• callbackFn
  • : A function to execute for each element in the typed array. Its return value is discarded. The function is called with the following arguments:
    • element
      • : The current element being processed in the typed array.
    • index
      • : The index of the current element being processed in the typed array.
    • array
      • : The typed array forEach() was called upon.

• thisArg

  • : A value to use as this when executing callbackFn. See iterative methods.

Return value

None (undefined).

Description

See Array.prototype.forEach for more details. This method is not generic and can only be called on typed array instances.

Examples

Logging the contents of a typed array

The following code logs a line for each element in a typed array:

function logArrayElements(element, index, array) {
  console.log(`a[${index}] = ${element}`);
}

new Uint8Array([0, 1, 2, 3]).forEach(logArrayElements);
// Logs:
// a[0] = 0
// a[1] = 1
// a[2] = 2
// a[3] = 3

Specifications

Browser compatibility

See also

• Polyfill of TypedArray.prototype.forEach in core-js
• JavaScript typed arrays guide
• TypedArray
• TypedArray.prototype.find
• TypedArray.prototype.map
• TypedArray.prototype.filter
• TypedArray.prototype.every
• TypedArray.prototype.some
• Array.prototype.forEach
• Map.prototype.forEach
• Set.prototype.forEach