From 1362bae57d54d163c243a324b6c3fbea8c588df3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=A8=E5=A5=95?=
 <Leopoldthecoder@users.noreply.github.com>
Date: Wed, 21 Mar 2018 10:54:33 +0800
Subject: [PATCH] Popover: fix error when reference comes before popover
 (#10273)

---
 packages/popover/src/directive.js | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/packages/popover/src/directive.js b/packages/popover/src/directive.js
index 3ad8d9422..0bed851dd 100644
--- a/packages/popover/src/directive.js
+++ b/packages/popover/src/directive.js
@@ -1,7 +1,16 @@
-export default {
-  bind(el, binding, vnode) {
-    // vue中 v-popover:argument 和 v-popover="variate|| expression"得到的binding数据是不同的。后者可以指向动态popver组件，可以极大的增强popover指令的灵活程度。
-    const _ref = binding.expression ? binding.value : binding.arg;
-    vnode.context.$refs[_ref].$refs.reference = el;
+const getReference = (el, binding, vnode) => {
+  const _ref = binding.expression ? binding.value : binding.arg;
+  const popper = vnode.context.$refs[_ref];
+  if (popper) {
+    popper.$refs.reference = el;
+  }
+};
+
+export default {
+  bind(el, binding, vnode) {
+    getReference(el, binding, vnode);
+  },
+  inserted(el, binding, vnode) {
+    getReference(el, binding, vnode);
   }
 };