// create a SharedArrayBuffer with a size in bytes
const buffer = new SharedArrayBuffer(16);
const uint8 = new Uint8Array(buffer);
uint8[0] = 5;
Atomics.compareExchange(uint8, 0, 5, 2); // returns 5
console.log(Atomics.load(uint8, 0));
// expected output: 2
Atomics.compareExchange(uint8, 0, 5, 4); // returns 2
console.log(Atomics.load(uint8, 0));
// expected output: 2
// create a SharedArrayBuffer with a size in bytesconst buffer = new SharedArrayBuffer(16);const uint8 = new Uint8Array(buffer);uint8[0] = 5;Atomics.compareExchange(uint8, 0, 5, 2); // returns 5console.log(Atomics.load(uint8, 0));// expected output: 2Atomics.compareExchange(uint8, 0, 5, 4); // returns 2console.log(Atomics.load(uint8, 0));// expected output: 2