fix: allow traversing reactive objects which are sealed (vuejs#7080)

neelance · hefeng · commit 83e7c1b671a3 · 2019-01-25T17:42:50.000+08:00
diff --git a/src/core/observer/traverse.js b/src/core/observer/traverse.js
@@ -18,7 +18,7 @@ export function traverse (val: any) {
 function _traverse (val: any, seen: SimpleSet) {
   let i, keys
   const isA = Array.isArray(val)
-  if ((!isA && !isObject(val)) || !Object.isExtensible(val)) {
+  if ((!isA && !isObject(val)) || Object.isFrozen(val)) {
     return
   }
   if (val.__ob__) {

Original file line number	Diff line number	Diff line change
`@@ -18,7 +18,7 @@ export function traverse (val: any) {`
`18`	`18`	`function _traverse (val: any, seen: SimpleSet) {`
`19`	`19`	`let i, keys`
`20`	`20`	`const isA = Array.isArray(val)`
`21`		`- if ((!isA && !isObject(val)) \|\| !Object.isExtensible(val)) {`
	`21`	`+ if ((!isA && !isObject(val)) \|\| Object.isFrozen(val)) {`
`22`	`22`	`return`
`23`	`23`	`}`
`24`	`24`	`if (val.__ob__) {`