use isDef

yyx990803 · yyx990803 · commit ed691b09da9e · 2017-04-29T14:40:46.000+08:00
diff --git a/src/core/vdom/create-element.js b/src/core/vdom/create-element.js
@@ -99,7 +99,7 @@ export function _createElement (
     // direct component options / constructor
     vnode = createComponent(tag, data, context, children)
   }
-  if (vnode != null) {
+  if (isDef(vnode)) {
     if (ns) applyNS(vnode, ns)
     return vnode
   } else {

Original file line number	Diff line number	Diff line change
`@@ -99,7 +99,7 @@ export function _createElement (`
`99`	`99`	`// direct component options / constructor`
`100`	`100`	`vnode = createComponent(tag, data, context, children)`
`101`	`101`	`}`
`102`		`- if (vnode != null) {`
	`102`	`+ if (isDef(vnode)) {`
`103`	`103`	`if (ns) applyNS(vnode, ns)`
`104`	`104`	`return vnode`
`105`	`105`	`} else {`