fix: don't show transition on first rendering #338

Author: tangjinzhou

components/_util/openAnimation.js

@@ -17,7 +17,7 @@ function animate (node, show, done, type) {
         height = node.offsetHeight
         // not get offsetHeight when appear
         // set it into raf get correct offsetHeight
-        if (type === 'appear' && height === 0) {
+        if (height === 0) {
           appearRequestAnimationFrameId = raf(() => {
             height = node.offsetHeight
             node.style.height = '0px'
@@ -59,9 +59,6 @@ const animation = {
   leave (node, done) {
     return animate(node, false, done)
   },
-  appear (node, done) {
-    return animate(node, true, done, 'appear')
-  },
 }
 
 export default animation