fix: correct the symbol check (vuejs#218)

close vuejs#116
pikax · Apr 19, 2020 · af1dd40 · af1dd40
1 parent 71896f5
commit af1dd40
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/src/utils.ts b/src/utils.ts
@@ -2,7 +2,13 @@ import Vue from 'vue';
 
 const toString = (x: any) => Object.prototype.toString.call(x);
 
-export const hasSymbol = typeof Symbol === 'function' && Symbol.for;
+export function isNative (Ctor: any): boolean {
+  return typeof Ctor === 'function' && /native code/.test(Ctor.toString())
+}
+
+export const hasSymbol =
+  typeof Symbol !== 'undefined' && isNative(Symbol) &&
+  typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys)
 
 export const noopFn: any = (_: any) => _;