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indexOf(searchElement)
indexOf(searchElement, fromIndex)
searchElementfromIndex-1 0 0
**-1**
let 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
| ECMAScript 2027 LanguageSpecification # sec-%typedarray%.prototype.indexof |
TypedArrayat()TypedArray.prototype.copyWithin()TypedArray.prototype.entries()TypedArray.prototype.every()TypedArray.prototype.fill()TypedArray.prototype.filter()TypedArray.prototype.find()TypedArray.prototype.findIndex()findLast()findLastIndex()TypedArray.prototype.forEach()TypedArray.prototype.includes()TypedArray.prototype.indexOf()TypedArray.prototype.join()TypedArray.prototype.keys()TypedArray.prototype.lastIndexOf()TypedArray.prototype.map()TypedArray.prototype.reduce()TypedArray.prototype.reduceRight()TypedArray.prototype.reverse()set()slice()TypedArray.prototype.some()TypedArray.prototype.sort()TypedArray.prototype.subarray()TypedArray.prototype.toLocaleString()toReversed()TypedArray.prototype.toSorted()toString()TypedArray.prototype.values()TypedArray.prototype.with()TypedArray.prototype[Symbol.iterator]()Object/FunctionObject.prototype.__defineGetter__()Object.prototype.__defineSetter__()Object.prototype.__lookupGetter__()Object.prototype.__lookupSetter__()Object.prototype.hasOwnProperty()Object.prototype.isPrototypeOf()Object.prototype.propertyIsEnumerable()Object.prototype.toLocaleString()Object.prototype.toString()Object.prototype.valueOf()BigInt64ArrayBigUint64ArrayFloat16ArrayFloat32ArrayFloat64ArrayInt8ArrayInt16ArrayInt32ArrayUint8ArrayUint8ClampedArrayUint16ArrayUint32Array| Web Proxy Viewer | New URL | Original Page |