feat(isES2015): improve ES2015 detection

karol-f · karol-f · commit bd59151deef4 · 2018-10-16T14:48:56.000+02:00
diff --git a/src/utils/isES2015.js b/src/utils/isES2015.js
@@ -1,5 +1,5 @@
 function isES2015() {
-  if (typeof Symbol === 'undefined' || typeof Reflect === 'undefined') return false;
+  if (typeof Symbol === 'undefined' || typeof Reflect === 'undefined' || typeof Proxy === 'undefined' || Object.isSealed(Proxy)) return false;
 
   return true;
 }

Original file line number	Diff line number	Diff line change
`@@ -1,5 +1,5 @@`
`1`	`1`	`function isES2015() {`
`2`		`- if (typeof Symbol === 'undefined' \|\| typeof Reflect === 'undefined') return false;`
	`2`	`+ if (typeof Symbol === 'undefined' \|\| typeof Reflect === 'undefined' \|\| typeof Proxy === 'undefined' \|\| Object.isSealed(Proxy)) return false;`
`3`	`3`
`4`	`4`	`return true;`
`5`	`5`	`}`