refactor(transition): replace nested closure with static ones (vuejs#…

…8547)

src/platforms/web/runtime/components/transition.js

@@ -76,6 +76,10 @@ function isSameChild (child: VNode, oldChild: VNode): boolean {
  return oldChild.key === child.key && oldChild.tag === child.tag
 }
 
+const isNotTextNode = (c: VNode) => c.tag || isAsyncPlaceholder(c)
+
+const isVShowDirective = d => d.name === 'show'
+
 export default {
  name: 'transition',
  props: transitionProps,
@@ -88,7 +92,7 @@ export default {
  }
 
  // filter out text nodes (possible whitespaces)
- children = children.filter((c: VNode) => c.tag || isAsyncPlaceholder(c))
+ children = children.filter(isNotTextNode)
  /* istanbul ignore if */
  if (!children.length) {
  return
@@ -153,7 +157,7 @@ export default {
 
  // mark v-show
  // so that the transition module can hand over the control to the directive
- if (child.data.directives && child.data.directives.some(d => d.name === 'show')) {
+ if (child.data.directives && child.data.directives.some(isVShowDirective)) {
  child.data.show = true
  }