fix(runtime-core): ensure root stable fragments inherit elements for moving

yyx990803 · yyx990803 · commit bebd44f793cc · 2020-09-16T12:18:03.000-04:00
fix #2134
diff --git a/packages/runtime-core/src/renderer.ts b/packages/runtime-core/src/renderer.ts
@@ -1157,7 +1157,12 @@ function baseCreateRenderer(
         )
         // #2080 if the stable fragment has a key, it's a <template v-for> that may
         //  get moved around. Make sure all root level vnodes inherit el.
-        if (n2.key != null) {
+        // #2134 or if it's a component root, it may also get moved around
+        // as the component is being moved.
+        if (
+          n2.key != null ||
+          (parentComponent && n2 === parentComponent.subTree)
+        ) {
           traverseStaticChildren(n1, n2, true /* shallow */)
         }
       } else {

Original file line number	Diff line number	Diff line change
`@@ -1157,7 +1157,12 @@ function baseCreateRenderer(`
`1157`	`1157`	`)`
`1158`	`1158`	`// #2080 if the stable fragment has a key, it's a <template v-for> that may`
`1159`	`1159`	`// get moved around. Make sure all root level vnodes inherit el.`
`1160`		`- if (n2.key != null) {`
	`1160`	`+ // #2134 or if it's a component root, it may also get moved around`
	`1161`	`+ // as the component is being moved.`
	`1162`	`+ if (`
	`1163`	`+ n2.key != null \|\|`
	`1164`	`+ (parentComponent && n2 === parentComponent.subTree)`
	`1165`	`+ ) {`
`1161`	`1166`	`traverseStaticChildren(n1, n2, true /* shallow */)`
`1162`	`1167`	`}`
`1163`	`1168`	`} else {`