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