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21 lines
803 B
21 lines
803 B
'use strict'; |
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var $ = require('../internals/export'); |
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var flattenIntoArray = require('../internals/flatten-into-array'); |
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var toObject = require('../internals/to-object'); |
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var toLength = require('../internals/to-length'); |
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var aFunction = require('../internals/a-function'); |
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var arraySpeciesCreate = require('../internals/array-species-create'); |
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// `Array.prototype.flatMap` method |
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// https://github.com/tc39/proposal-flatMap |
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$({ target: 'Array', proto: true }, { |
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flatMap: function flatMap(callbackfn /* , thisArg */) { |
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var O = toObject(this); |
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var sourceLen = toLength(O.length); |
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var A; |
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aFunction(callbackfn); |
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A = arraySpeciesCreate(O, 0); |
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A.length = flattenIntoArray(A, O, O, sourceLen, 0, 1, callbackfn, arguments.length > 1 ? arguments[1] : undefined); |
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return A; |
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} |
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});
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