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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 returns false if it finds an element in the array that does not satisfy the provided testing function. Otherwise, it returns true. This method has the same algorithm as Array.prototype.every().

In this article

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

js
every(callbackFn)
every(callbackFn, thisArg)

Parameters

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:

The current element being processed in the typed array.

The index of the current element being processed in the typed array.

The typed array every() was called upon.

thisArg Optional

A value to use as this when executing callbackFn. 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.

js
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® 2027 Language Specification
# sec-%typedarray%.prototype.every

Browser compatibility

Enable JavaScript to view this browser compatibility table.

See also

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This page was last modified on Feb 24, 2026 by MDN contributors.

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Standard built-in objects
TypedArray
Static methods
1. from()
2. of()
Static properties
1. BYTES_PER_ELEMENT
2. [Symbol.species]
Instance methods
1. at()
2. copyWithin()
3. entries()
4. every()
5. fill()
6. filter()
7. find()
8. findIndex()
9. findLast()
10. findLastIndex()
11. forEach()
12. includes()
13. indexOf()
14. join()
15. keys()
16. lastIndexOf()
17. map()
18. reduce()
19. reduceRight()
20. reverse()
21. set()
22. slice()
23. some()
24. sort()
25. subarray()
26. toLocaleString()
27. toReversed()
28. toSorted()
29. toString()
30. values()
31. with()
32. [Symbol.iterator]()
Instance properties
1. buffer
2. byteLength
3. byteOffset
4. length
Inheritance
Object/Function
Static methods
1. apply()
2. bind()
3. call()
4. toString()
5. [Symbol.hasInstance]()
Static properties
1. displayName
2. length
3. name
4. prototype
5. arguments
6. caller
Instance methods
1. __defineGetter__()
2. __defineSetter__()
3. __lookupGetter__()
4. __lookupSetter__()
5. hasOwnProperty()
6. isPrototypeOf()
7. propertyIsEnumerable()
8. toLocaleString()
9. toString()
10. valueOf()
Instance properties
1. __proto__
2. constructor
Related pages
BigInt64Array
BigUint64Array
Float16Array
Float32Array
Float64Array
Int8Array
Int16Array
Int32Array
Uint8Array
Uint8ClampedArray
Uint16Array
Uint32Array