Baseline Widely available
The includes() method of TypedArray instances determines whether a typed array includes a certain value among its entries, returning true or false as appropriate. This method has the same algorithm as Array.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)
searchElement
The value to search for.
fromIndex Optional
Zero-based index at which to start searching, converted to an integer.
A boolean value which is true if the value searchElement is found within the typed array (or the part of the typed array indicated by the index fromIndex, if specified).
See Array.prototype.includes() for more details. This method is not generic and can only be called on typed array instances.
const uint8 = new Uint8Array([1, 2, 3]);
uint8.includes(2); // true
uint8.includes(4); // false
uint8.includes(3, 3); // false
// NaN handling (only relevant for floating point arrays)
new Uint8Array([NaN]).includes(NaN); // false, since the NaN passed to the constructor gets converted to 0
new Float32Array([NaN]).includes(NaN); // true
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