fix: the problem that v-auth directive doesn't take effect in native html element; 🐛

修复：v-auth 指令在原生 HTML 元素上不生效的 bug；

src/plugins/authority-plugin.js

@@ -48,6 +48,7 @@ const auth = function(authConfig, permission, role, permissions, roles) {
  * @returns {boolean}
  */
 const preventClick = function (event) {
+  event.preventDefault()
   event.stopPropagation()
   return false
 }
@@ -55,7 +56,7 @@ const preventClick = function (event) {
 const checkInject = function (el, binding,vnode) {
   const type = binding.arg
   const check = binding.value
-  const instance = vnode.componentInstance
+  const instance = vnode.context
   const $auth = instance.$auth
   if (!$auth || !$auth(check, type)) {
     el.classList.add('disabled')

src/theme/default/style.less

@@ -28,5 +28,5 @@
 }
 .disabled{
   cursor: not-allowed;
-  opacity: 0.4;
+  color: @disabled-color;
 }