TypedArray.prototype.includes()

const uint8 = new Uint8Array([10, 20, 30, 40, 50]);
console.log(uint8.includes(20));
// Expected output: true
// Check from position 3
console.log(uint8.includes(20, 3));
// Expected output: false

includes(searchElement)
includes(searchElement, fromIndex)

const uint8 = new Uint8Array([1, 2, 3]);
uint8.includes(2); // true
uint8.includes(4); // false
uint8.includes(3, 3); // false
// NaN の扱い (Float32 および Float64 に限り true)
new Uint8Array([NaN]).includes(NaN); // false (コンストラクターに渡した NaN は 0 に変換されるため)
new Float32Array([NaN]).includes(NaN); // true;
new Float64Array([NaN]).includes(NaN); // true;