avoid pushing the same ref more than once (fix vuejs#4253)

yyx990803 · yyx990803 · commit 06f41ad9fe9d · 2016-11-19T21:45:52.000-05:00
diff --git a/src/core/vdom/modules/ref.js b/src/core/vdom/modules/ref.js
@@ -32,7 +32,7 @@ export function registerRef (vnode: VNodeWithData, isRemoval: ?boolean) {
     }
   } else {
     if (vnode.data.refInFor) {
-      if (Array.isArray(refs[key])) {
+      if (Array.isArray(refs[key]) && refs[key].indexOf(ref) < 0) {
         refs[key].push(ref)
       } else {
         refs[key] = [ref]

Original file line number	Diff line number	Diff line change
`@@ -32,7 +32,7 @@ export function registerRef (vnode: VNodeWithData, isRemoval: ?boolean) {`
`32`	`32`	`}`
`33`	`33`	`} else {`
`34`	`34`	`if (vnode.data.refInFor) {`
`35`		`- if (Array.isArray(refs[key])) {`
	`35`	`+ if (Array.isArray(refs[key]) && refs[key].indexOf(ref) < 0) {`
`36`	`36`	`refs[key].push(ref)`
`37`	`37`	`} else {`
`38`	`38`	`refs[key] = [ref]`