perf(transform-vif): don't need to createBlock for a component (#853)

2020-03-20 23:29:44 +08:00
parent 342d46d82a
commit a3601e9fa7
2 changed files with 24 additions and 2 deletions
--- a/packages/compiler-core/src/transforms/vIf.ts
+++ b/packages/compiler-core/src/transforms/vIf.ts
@@ -212,7 +212,12 @@ function createChildrenCodegenNode(
    const vnodeCall = (firstChild as ElementNode)
      .codegenNode as BlockCodegenNode
    // Change createVNode to createBlock.
-    if (vnodeCall.type === NodeTypes.VNODE_CALL) {
+    if (
+      vnodeCall.type === NodeTypes.VNODE_CALL &&
+      // component vnodes are always tracked and its children are
+      // compiled into slots so no need to make it a block
+      (firstChild as ElementNode).tagType !== ElementTypes.COMPONENT
+    ) {
      vnodeCall.isBlock = true
      helper(OPEN_BLOCK)
      helper(CREATE_BLOCK)