Vue自定义v-has指令,做按钮权限判断的步骤

<input v-focus>

// 注册一个全局自定义指令 `v-focus`
Vue.directive('focus', {
  // 当被绑定的元素插入到 DOM 中时……
  inserted: function (el) {
    // 聚焦元素
    el.focus()
  }
})

//如果想注册局部指令，组件中也接受一个 directives 的选项：
directives: {
  focus: {
    // 指令的定义
    inserted: function (el) {
      el.focus()
    }
  }
}

[
    {
        "checked":false,
        "component":"",
        "createTime":"2019-06-29 18:21:06",
        "createUser":"026a564bbfd84861ac4b65393644beef",
        "icon":"",
        "id":"1503273153861066776",
        "name":"今日采集（案卷）",
        "open":"true",
        "parentId":"2328050996633395469",
        "parentName":"首页",
        "permission":"sys:index:vol",
        "sort":103,
        "status":"0",
        "type":"2",
        "updateTime":"2021-01-27 15:51:15",
        "updateUser":"026a564bbfd84861ac4b65393644beef",
        "url":""
    }
]

const hasPermission = {
    install (Vue, options) {
        Vue.directive('has', {
            inserted: (el, binding, vnode)=>{
                filterGlobalPermission(el, binding, vnode);
            }
        });
    }
};

export const filterGlobalPermission = (el, binding, vnode) => {
    let permissionList = [];
    let authList = JSON.parse(localStorage.getItem('LOGIN_USER_BUTTON_AUTH') || "[]");
    for (let auth of authList) {
        permissionList.push(auth);
    }
    if (!permissionList.length) {
        el.parentNode.removeChild(el);
        return;
    }
    let permissions = [];
    for (let item of permissionList) {
        permissions.push(item.permission);
    }
    if (!permissions.includes(binding.value)) {
        el.parentNode.removeChild(el);
    }
}
export default hasPermission;

import hasPermission from './hasPermission'
export { hasPermission }

import { hasPermission } from '@/utils'
Vue.use(hasPermission)

<el-button v-has="'sys:arch:add'" type="primary" size="mini" icon="el-icon-plus" @click="add('1')">
    新增
</el-button>