From 3d2bcadf337531f2c8c7ed90f5d2730a75411315 Mon Sep 17 00:00:00 2001
From: 1921622004 <1921622004qwer@gmail.com>
Date: Mon, 5 Nov 2018 21:45:20 +0800
Subject: [PATCH] fix bug

---
 packages/omi/src/we-element.js | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/packages/omi/src/we-element.js b/packages/omi/src/we-element.js
index 905603657..fb8d89cdb 100644
--- a/packages/omi/src/we-element.js
+++ b/packages/omi/src/we-element.js
@@ -28,7 +28,18 @@ export default class WeElement extends HTMLElement {
     }
 
     this.install()
-    const shadowRoot = this.attachShadow({ mode: 'open' })
+    var shadowRoot
+    if (!this.shadowRoot) {
+      shadowRoot = this.attachShadow({
+        mode: 'open'
+      })
+    } else {
+      shadowRoot = this.shadowRoot
+      var fc
+      while (fc = shadowRoot.firstChild) {
+        shadowRoot.removeChild(fc)
+      }
+    }
 
     this.css && shadowRoot.appendChild(cssToDom(this.css()))
     this.beforeRender()