stricter Symbol support check

yyx990803 · yyx990803 · commit 906fa89234df · 2017-02-25T22:58:08.000-05:00
diff --git a/src/core/util/env.js b/src/core/util/env.js
@@ -41,7 +41,9 @@ export function isNative (Ctor: Function): boolean {
   return /native code/.test(Ctor.toString())
 }
 
-export const hasSymbol = typeof Symbol !== 'undefined' && isNative(Symbol)
+export const hasSymbol =
+  typeof Symbol !== 'undefined' && isNative(Symbol) &&
+  typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys)
 
 /**
  * Defer a task to execute it asynchronously.

Original file line number	Diff line number	Diff line change
`@@ -41,7 +41,9 @@ export function isNative (Ctor: Function): boolean {`
`41`	`41`	`return /native code/.test(Ctor.toString())`
`42`	`42`	`}`
`43`	`43`
`44`		`-export const hasSymbol = typeof Symbol !== 'undefined' && isNative(Symbol)`
	`44`	`+export const hasSymbol =`
	`45`	`+ typeof Symbol !== 'undefined' && isNative(Symbol) &&`
	`46`	`+ typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys)`
`45`	`47`
`46`	`48`	`/**`
`47`	`49`	`* Defer a task to execute it asynchronously.`