TypedArray.prototype.every()
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2016.
The every() method of TypedArray instances tests whether all elements in the typed array pass the test implemented by the provided function. It returns a Boolean value. This method has the same algorithm as Array.prototype.every().
Try it
function isNegative(element, index, array) {
return element < 0;
}
const int8 = new Int8Array([-10, -20, -30, -40, -50]);
console.log(int8.every(isNegative));
// Expected output: true
Syntax
every(callbackFn)
every(callbackFn, thisArg)
Parameters
callbackFn-
A function to execute for each element in the typed array. It should return a truthy value to indicate the element passes the test, and a falsy value otherwise. The function is called with the following arguments:
thisArgOptional-
A value to use as
thiswhen executingcallbackFn. See iterative methods.
Return value
true unless callbackFn returns a falsy value for a typed array element, in which case false is immediately returned.
Description
See Array.prototype.every() for more details. This method is not generic and can only be called on typed array instances.
Examples
Testing size of all typed array elements
The following example tests whether all elements in the typed array are 10 or bigger.
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
Specifications
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-%typedarray%.prototype.every |