1 files changed, 50 insertions, 0 deletions
diff --git a/node_modules/core-js/modules/es.symbol.description.js b/node_modules/core-js/modules/es.symbol.description.js
new file mode 100644
index 0000000..ea67abf
--- /dev/null
+++ b/node_modules/core-js/modules/es.symbol.description.js
@@ -0,0 +1,50 @@
+// `Symbol.prototype.description` getter
+// https://tc39.github.io/ecma262/#sec-symbol.prototype.description
+'use strict';
+var $ = require('../internals/export');
+var DESCRIPTORS = require('../internals/descriptors');
+var global = require('../internals/global');
+var has = require('../internals/has');
+var isObject = require('../internals/is-object');
+var defineProperty = require('../internals/object-define-property').f;
+var copyConstructorProperties = require('../internals/copy-constructor-properties');
+
+var NativeSymbol = global.Symbol;
+
+if (DESCRIPTORS && typeof NativeSymbol == 'function' && (!('description' in NativeSymbol.prototype) ||
+  // Safari 12 bug
+  NativeSymbol().description !== undefined
+)) {
+  var EmptyStringDescriptionStore = {};
+  // wrap Symbol constructor for correct work with undefined description
+  var SymbolWrapper = function Symbol() {
+    var description = arguments.length < 1 || arguments[0] === undefined ? undefined : String(arguments[0]);
+    var result = this instanceof SymbolWrapper
+      ? new NativeSymbol(description)
+      // in Edge 13, String(Symbol(undefined)) === 'Symbol(undefined)'
+      : description === undefined ? NativeSymbol() : NativeSymbol(description);
+    if (description === '') EmptyStringDescriptionStore[result] = true;
+    return result;
+  };
+  copyConstructorProperties(SymbolWrapper, NativeSymbol);
+  var symbolPrototype = SymbolWrapper.prototype = NativeSymbol.prototype;
+  symbolPrototype.constructor = SymbolWrapper;
+
+  var symbolToString = symbolPrototype.toString;
+  var native = String(NativeSymbol('test')) == 'Symbol(test)';
+  var regexp = /^Symbol\((.*)\)[^)]+$/;
+  defineProperty(symbolPrototype, 'description', {
+    configurable: true,
+    get: function description() {
+      var symbol = isObject(this) ? this.valueOf() : this;
+      var string = symbolToString.call(symbol);
+      if (has(EmptyStringDescriptionStore, symbol)) return '';
+      var desc = native ? string.slice(7, -1) : string.replace(regexp, '$1');
+      return desc === '' ? undefined : desc;
+    }
+  });
+
+  $({ global: true, forced: true }, {
+    Symbol: SymbolWrapper
+  });
+}