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