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- 'use strict';
- var ArrayBufferViewCore = require('../internals/array-buffer-view-core');
- var lengthOfArrayLike = require('../internals/length-of-array-like');
- var toIntegerOrInfinity = require('../internals/to-integer-or-infinity');
- var aTypedArray = ArrayBufferViewCore.aTypedArray;
- var exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;
- // `%TypedArray%.prototype.at` method
- // https://tc39.es/ecma262/#sec-%typedarray%.prototype.at
- exportTypedArrayMethod('at', function at(index) {
- var O = aTypedArray(this);
- var len = lengthOfArrayLike(O);
- var relativeIndex = toIntegerOrInfinity(index);
- var k = relativeIndex >= 0 ? relativeIndex : len + relativeIndex;
- return (k < 0 || k >= len) ? undefined : O[k];
- });
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