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node_modules/core-js/modules/es.array.flat-map.js

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+'use strict';
+var $ = require('../internals/export');
+var flattenIntoArray = require('../internals/flatten-into-array');
+var aCallable = require('../internals/a-callable');
+var toObject = require('../internals/to-object');
+var lengthOfArrayLike = require('../internals/length-of-array-like');
+var arraySpeciesCreate = require('../internals/array-species-create');
+
+// `Array.prototype.flatMap` method
+// https://tc39.es/ecma262/#sec-array.prototype.flatmap
+$({ target: 'Array', proto: true }, {
+  flatMap: function flatMap(callbackfn /* , thisArg */) {
+    var O = toObject(this);
+    var sourceLen = lengthOfArrayLike(O);
+    var A;
+    aCallable(callbackfn);
+    A = arraySpeciesCreate(O, 0);
+    A.length = flattenIntoArray(A, O, O, sourceLen, 0, 1, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+    return A;
+  }
+});