Atomics.load()
BaselineWidely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since December 2021.
TheAtomics.load() staticmethod returns a value at a given position in the array.
Try it
// Create a SharedArrayBuffer with a size in bytesconst buffer = new SharedArrayBuffer(16);const uint8 = new Uint8Array(buffer);uint8[0] = 5;// 5 + 2 = 7console.log(Atomics.add(uint8, 0, 2));// Expected output: 5console.log(Atomics.load(uint8, 0));// Expected output: 7Syntax
js
Atomics.load(typedArray, index)Parameters
typedArrayAn integer typed array. One of
Int8Array,Uint8Array,Int16Array,Uint16Array,Int32Array,Uint32Array,BigInt64Array, orBigUint64Array.indexThe position in the
typedArrayto load from.
Return value
The value at the given position (typedArray[index]).
Exceptions
TypeErrorThrown if
typedArrayis not one of the allowed integer types.RangeErrorThrown if
indexis out of bounds in thetypedArray.
Examples
Usingload
js
const sab = new SharedArrayBuffer(1024);const ta = new Uint8Array(sab);Atomics.add(ta, 0, 12);Atomics.load(ta, 0); // 12Specifications
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-atomics.load |