Web/JavaScript/Reference/Global objects/TypedArray/every

The every() method tests whether all elements in the typed array pass the test implemented by the provided function. This method has the same algorithm as Array.prototype.every(). TypedArray is one of the typed array types here.

Syntax

typedarray.every(callback[, thisArg])

Parameters

callback: A function to test for each element, taking three arguments:

element The current element being processed in the typed array. index Optional The index of the current element being processed in the typed array. array Optional The typed array every was called upon.

thisArg Optional: A value to use as this when executing callback.

Return value

true if the callback function returns a truthy value for every array element; otherwise, false.

Description

The every method executes the provided callback function once for each element present in the typed array until it finds the one where callback returns a falsyfalsy value. If such an element is found, the every method immediately returns false. Otherwise, if callback returns a truthy value for all elements, every returns true.

callback is invoked with three arguments: the value of the element, the index of the element, and the typed array object being traversed.

If a thisArg parameter is provided to every, it will be used as callback's this value. Otherwise, the value undefined will be used as its this value. The this value ultimately observable by callback is determined according to the usual rules for determining the this seen by a function.

every does not mutate the typed array on which it is called.

Examples

Testing size of all typed array elements

The following example tests whether all elements in the typed array are bigger than 10.

function isBigEnough(element, index, array) {
  return element >= 10;
}
new Uint8Array([12, 5, 8, 130, 44]).every(isBigEnough);   // false
new Uint8Array([12, 54, 18, 130, 44]).every(isBigEnough); // true

Testing typed array elements using arrow functions

Arrow functions provide a shorter syntax for the same test.

new Uint8Array([12, 5, 8, 130, 44]).every(elem => elem >= 10); // false
new Uint8Array([12, 54, 18, 130, 44]).every(elem => elem >= 10); // true

Specifications

Specification
[(ECMA-262)The definition of 'TypedArray.prototype.every' in that specification.]

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet	Node.js
`every`	Chrome Full support 45	Edge Full support 14	Firefox Full support 37	IE No support No	Opera Full support 36	Safari Full support 9.1	WebView Android No support No	Chrome Android Full support 45	Firefox Android Full support 37	Opera Android No support No	Safari iOS Full support 9.3	Samsung Internet Android Full support 5.0	nodejs Full support 4.0.0

Legend

Full support: Full support
No support: No support