1 files changed, 60 insertions, 0 deletions
diff --git a/node_modules/vue/src/platforms/web/runtime/directives/show.js b/node_modules/vue/src/platforms/web/runtime/directives/show.js
new file mode 100644
index 00000000..17fb5dec
--- /dev/null
+++ b/node_modules/vue/src/platforms/web/runtime/directives/show.js
@@ -0,0 +1,60 @@
+/* @flow */
+
+import { enter, leave } from '../modules/transition'
+
+// recursively search for possible transition defined inside the component root
+function locateNode (vnode: VNode): VNodeWithData {
+  return vnode.componentInstance && (!vnode.data || !vnode.data.transition)
+    ? locateNode(vnode.componentInstance._vnode)
+    : vnode
+}
+
+export default {
+  bind (el: any, { value }: VNodeDirective, vnode: VNodeWithData) {
+    vnode = locateNode(vnode)
+    const transition = vnode.data && vnode.data.transition
+    const originalDisplay = el.__vOriginalDisplay =
+      el.style.display === 'none' ? '' : el.style.display
+    if (value && transition) {
+      vnode.data.show = true
+      enter(vnode, () => {
+        el.style.display = originalDisplay
+      })
+    } else {
+      el.style.display = value ? originalDisplay : 'none'
+    }
+  },
+
+  update (el: any, { value, oldValue }: VNodeDirective, vnode: VNodeWithData) {
+    /* istanbul ignore if */
+    if (!value === !oldValue) return
+    vnode = locateNode(vnode)
+    const transition = vnode.data && vnode.data.transition
+    if (transition) {
+      vnode.data.show = true
+      if (value) {
+        enter(vnode, () => {
+          el.style.display = el.__vOriginalDisplay
+        })
+      } else {
+        leave(vnode, () => {
+          el.style.display = 'none'
+        })
+      }
+    } else {
+      el.style.display = value ? el.__vOriginalDisplay : 'none'
+    }
+  },
+
+  unbind (
+    el: any,
+    binding: VNodeDirective,
+    vnode: VNodeWithData,
+    oldVnode: VNodeWithData,
+    isDestroy: boolean
+  ) {
+    if (!isDestroy) {
+      el.style.display = el.__vOriginalDisplay
+    }
+  }
+}