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47 lines
1.9 KiB
JavaScript
47 lines
1.9 KiB
JavaScript
import baseGetTag from './.internal/baseGetTag.js';
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import isLength from './isLength.js';
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import isObjectLike from './isObjectLike.js';
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import nodeUtil from './.internal/nodeUtil.js';
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/** Used to identify `toStringTag` values of typed arrays. */
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const typedArrayTags = {};
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typedArrayTags['[object Float32Array]'] = typedArrayTags['[object Float64Array]'] =
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typedArrayTags['[object Int8Array]'] = typedArrayTags['[object Int16Array]'] =
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typedArrayTags['[object Int32Array]'] = typedArrayTags['[object Uint8Array]'] =
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typedArrayTags['[object Uint8ClampedArray]'] = typedArrayTags['[object Uint16Array]'] =
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typedArrayTags['[object Uint32Array]'] = true;
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typedArrayTags['[object AsyncFunction]'] = typedArrayTags['[object Arguments]'] =
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typedArrayTags['[object Array]'] = typedArrayTags['[object ArrayBuffer]'] =
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typedArrayTags['[object Boolean]'] = typedArrayTags['[object DataView]'] =
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typedArrayTags['[object Date]'] = typedArrayTags['[object Error]'] =
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typedArrayTags['[object Function]'] = typedArrayTags['[object GeneratorFunction]'] =
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typedArrayTags['[object Map]'] = typedArrayTags['[object Number]'] =
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typedArrayTags['[object Object]'] = typedArrayTags['[object Proxy]'] =
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typedArrayTags['[object RegExp]'] = typedArrayTags['[object Set]'] =
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typedArrayTags['[object String]'] = typedArrayTags['[object WeakMap]'] = false;
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/* Node.js helper references. */
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const nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
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/**
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* Checks if `value` is classified as a typed array.
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*
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* @since 3.0.0
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* @category Lang
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
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* @example
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*
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* isTypedArray(new Uint8Array);
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* // => true
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*
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* isTypedArray([]);
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* // => false
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*/
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const isTypedArray = nodeIsTypedArray
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? value => nodeIsTypedArray(value)
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: value => isObjectLike(value) && isLength(value.length) && !!typedArrayTags[baseGetTag(value)];
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export default isTypedArray;
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