Baseline Widely available
The indexOf() method of TypedArray instances returns the first index at which a given element can be found in the typed array, or -1 if it is not present. This method has the same algorithm as Array.prototype.indexOf().
const uint8 = new Uint8Array([10, 20, 30, 40, 50]);
console.log(uint8.indexOf(50));
// Expected output: 4
// From position 3
console.log(uint8.indexOf(20, 3));
// Expected output: -1
console.log(uint8.indexOf(51));
// Expected output: -1
indexOf(searchElement)
indexOf(searchElement, fromIndex)
searchElement
Element to locate in the typed array.
fromIndex Optional
Zero-based index at which to start searching, converted to an integer.
The first index of searchElement in the typed array; -1 if not found.
See Array.prototype.indexOf() for more details. This method is not generic and can only be called on typed array instances.
const uint8 = new Uint8Array([2, 5, 9]);
uint8.indexOf(2); // 0
uint8.indexOf(7); // -1
uint8.indexOf(9, 2); // 2
uint8.indexOf(2, -1); // -1
uint8.indexOf(2, -3); // 0
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