Vue 权限控制 使用自定义指令 代替v-if

参考了vue-element-admin 指令库的permission

使用Demo(demo.vue)

<template>
  <p>admin组:<span v-permission="['admin']">可看见v-permission="['admin']"</span></p>
  
  <p>editor:<span v-permission="['editor']">可看见v-permission="['editor']"</span></p>
  
  <p>admin editor组:<span v-permission="['admin','editor']">可看见v-permission="['admin','editor']"</span></p>
  
  <p>another组:<span v-permission="['another']">可看见v-permission="['another']"</span></p>
</template>

v-permission指令代码 注册到全局(main.js)

const permission={ inserted(el, binding, vnode) { const { value } = binding const roles = ['editor','admin'] if (value && value instanceof Array && value.length > 0) { const permissionRoles = value const hasPermission = roles.some(role => { return permissionRoles.includes(role) }) if (!hasPermission) { el.parentNode && el.parentNode.removeChild(el) } } else { throw new Error(`need roles! Like v-permission="['admin','editor']"`) } } } Vue.directive('permission', permission)

对比

-  v-show (v-show的dom不隐藏，改变display用户能够看到不应看的信息)

- v-if (v-if删除节点遗留<!-- -->的注释)

易维护，明了