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22 lines
745 B
JavaScript
22 lines
745 B
JavaScript
6 years ago
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'use strict';
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// https://tc39.github.io/proposal-flatMap/#sec-Array.prototype.flatten
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var $export = require('./_export');
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var flattenIntoArray = require('./_flatten-into-array');
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var toObject = require('./_to-object');
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var toLength = require('./_to-length');
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var toInteger = require('./_to-integer');
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var arraySpeciesCreate = require('./_array-species-create');
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$export($export.P, 'Array', {
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flatten: function flatten(/* depthArg = 1 */) {
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var depthArg = arguments[0];
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var O = toObject(this);
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var sourceLen = toLength(O.length);
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var A = arraySpeciesCreate(O, 0);
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flattenIntoArray(A, O, O, sourceLen, 0, depthArg === undefined ? 1 : toInteger(depthArg));
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return A;
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}
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});
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require('./_add-to-unscopables')('flatten');
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