自定义指令

在vue.js官网的 可复用性&组合 里面的自定义属性

v-permission

权限控制，使用自定义属性代替 v-if与v-show

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>

main.js 全局注册
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)

参考文章https://www.cnblogs.com/runrunrun/p/11639053.html