fix: nullish check for vnode (vuejs#925)

liaoyinglong · web-flow · commit 293f03ba69fd · 2022-04-27T15:31:44.000+08:00
diff --git a/src/utils/instance.ts b/src/utils/instance.ts
@@ -107,11 +107,13 @@ function updateTemplateRef(vm: ComponentInstance) {
 export function afterRender(vm: ComponentInstance) {
   const stack = [(vm as any)._vnode as VNode]
   while (stack.length) {
-    const vnode = stack.pop()!
-    if (vnode.context) updateTemplateRef(vnode.context)
-    if (vnode.children) {
-      for (let i = 0; i < vnode.children.length; ++i) {
-        stack.push(vnode.children[i])
+    const vnode = stack.pop()
+    if (vnode) {
+      if (vnode.context) updateTemplateRef(vnode.context)
+      if (vnode.children) {
+        for (let i = 0; i < vnode.children.length; ++i) {
+          stack.push(vnode.children[i])
+        }
       }
     }
   }

Original file line number	Diff line number	Diff line change
`@@ -107,11 +107,13 @@ function updateTemplateRef(vm: ComponentInstance) {`
`107`	`107`	`export function afterRender(vm: ComponentInstance) {`
`108`	`108`	`const stack = [(vm as any)._vnode as VNode]`
`109`	`109`	`while (stack.length) {`
`110`		`- const vnode = stack.pop()!`
`111`		`- if (vnode.context) updateTemplateRef(vnode.context)`
`112`		`- if (vnode.children) {`
`113`		`- for (let i = 0; i < vnode.children.length; ++i) {`
`114`		`- stack.push(vnode.children[i])`
	`110`	`+ const vnode = stack.pop()`
	`111`	`+ if (vnode) {`
	`112`	`+ if (vnode.context) updateTemplateRef(vnode.context)`
	`113`	`+ if (vnode.children) {`
	`114`	`+ for (let i = 0; i < vnode.children.length; ++i) {`
	`115`	`+ stack.push(vnode.children[i])`
	`116`	`+ }`
`115`	`117`	`}`
`116`	`118`	`}`
`117`	`119`	`}`