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43 lines
1.4 KiB
43 lines
1.4 KiB
'use strict'; |
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var callBind = require('call-bind'); |
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var callBound = require('call-bound'); |
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var GetIntrinsic = require('get-intrinsic'); |
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var $ArrayBuffer = GetIntrinsic('%ArrayBuffer%', true); |
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/** @type {undefined | ((receiver: ArrayBuffer) => number) | ((receiver: unknown) => never)} */ |
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var $byteLength = callBound('ArrayBuffer.prototype.byteLength', true); |
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var $toString = callBound('Object.prototype.toString'); |
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// in node 0.10, ArrayBuffers have no prototype methods, but have an own slot-checking `slice` method |
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var abSlice = !!$ArrayBuffer && !$byteLength && new $ArrayBuffer(0).slice; |
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var $abSlice = !!abSlice && callBind(abSlice); |
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/** @type {import('.')} */ |
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module.exports = $byteLength || $abSlice |
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? function isArrayBuffer(obj) { |
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if (!obj || typeof obj !== 'object') { |
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return false; |
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} |
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try { |
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if ($byteLength) { |
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// @ts-expect-error no idea why TS can't handle the overload |
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$byteLength(obj); |
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} else { |
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// @ts-expect-error TS chooses not to type-narrow inside a closure |
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$abSlice(obj, 0); |
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} |
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return true; |
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} catch (e) { |
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return false; |
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} |
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} |
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: $ArrayBuffer |
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// in node 0.8, ArrayBuffers have no prototype or own methods, but also no Symbol.toStringTag |
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? function isArrayBuffer(obj) { |
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return $toString(obj) === '[object ArrayBuffer]'; |
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} |
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// @ts-expect-error |
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: function isArrayBuffer(obj) { // eslint-disable-line no-unused-vars |
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return false; |
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};
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