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node_modules/core-js/modules/es.array.slice.js

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+'use strict';
+var $ = require('../internals/export');
+var isArray = require('../internals/is-array');
+var isConstructor = require('../internals/is-constructor');
+var isObject = require('../internals/is-object');
+var toAbsoluteIndex = require('../internals/to-absolute-index');
+var lengthOfArrayLike = require('../internals/length-of-array-like');
+var toIndexedObject = require('../internals/to-indexed-object');
+var createProperty = require('../internals/create-property');
+var wellKnownSymbol = require('../internals/well-known-symbol');
+var arrayMethodHasSpeciesSupport = require('../internals/array-method-has-species-support');
+var nativeSlice = require('../internals/array-slice');
+
+var HAS_SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('slice');
+
+var SPECIES = wellKnownSymbol('species');
+var $Array = Array;
+var max = Math.max;
+
+// `Array.prototype.slice` method
+// https://tc39.es/ecma262/#sec-array.prototype.slice
+// fallback for not array-like ES3 strings and DOM objects
+$({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT }, {
+  slice: function slice(start, end) {
+    var O = toIndexedObject(this);
+    var length = lengthOfArrayLike(O);
+    var k = toAbsoluteIndex(start, length);
+    var fin = toAbsoluteIndex(end === undefined ? length : end, length);
+    // inline `ArraySpeciesCreate` for usage native `Array#slice` where it's possible
+    var Constructor, result, n;
+    if (isArray(O)) {
+      Constructor = O.constructor;
+      // cross-realm fallback
+      if (isConstructor(Constructor) && (Constructor === $Array || isArray(Constructor.prototype))) {
+        Constructor = undefined;
+      } else if (isObject(Constructor)) {
+        Constructor = Constructor[SPECIES];
+        if (Constructor === null) Constructor = undefined;
+      }
+      if (Constructor === $Array || Constructor === undefined) {
+        return nativeSlice(O, k, fin);
+      }
+    }
+    result = new (Constructor === undefined ? $Array : Constructor)(max(fin - k, 0));
+    for (n = 0; k < fin; k++, n++) if (k in O) createProperty(result, n, O[k]);
+    result.length = n;
+    return result;
+  }
+});