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.


typedarray.every(callback[, thisArg])


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


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.


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


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

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetNode.js
everyChrome Full support 45Edge Full support 14Firefox Full support 37IE No support NoOpera Full support 36Safari Full support 9.1WebView Android No support NoChrome Android Full support 45Firefox Android Full support 37Opera Android No support NoSafari iOS Full support 9.3Samsung Internet Android Full support 5.0nodejs Full support 4.0.0


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See also