Vue自定義指令實(shí)現(xiàn)按鈕級別權(quán)限

一但狭、src文件夾下新建utils文件夾披诗，文件夾下新建authoruty.js文件:

/**
 * 檢查權(quán)限點(diǎn)工具函數(shù)
 * @param {*} permissionCode 元素權(quán)限點(diǎn)
 * @param {*} permissions 所有權(quán)限點(diǎn)
 */
export function checkAuthority(permissionCode, permissions) {
  let hasPermission = true;
  
  if (permissionCode) {
    if (permissionCode instanceof Array && permissionCode.length > 0) {
      hasPermission = permissions.some(it =>
        permissionCode.includes(it)

      );
      console.log('permissionCode---', permissionCode)
      console.log('hasPermission---1', hasPermission)
    } else {
      hasPermission = permissions.some(item => item === permissionCode);
      console.log('hasPermission---2', hasPermission)
    }
  }
  return hasPermission;
}

二、src文件下新建directive文件夾立磁，隨之再建立Authority文件夾呈队，并在其下新建Authority.js文件和index.js文件，

Authority.js文件代碼：

import store from "@/store";
import { checkAuthority } from "@/utils/authority";
// console.log('store-----', store.state.user.permission)
console.log("store-----", store);
export default {
  inserted(el, binding, vnode) {
    const { value } = binding;
    const permissions = JSON.parse(localStorage.getItem('permissionData')) || []
    console.log('permissionList---', permissions)
    const hasPermission = checkAuthority(value, permissions);
    if (!hasPermission) {
      // eslint-disable-next-line no-unused-expressions
      if (el.parentNode) {
        el.parentNode.removeChild(el);
      } else {
        el.innerHTML = "";
      }
    } else {
      el && el.setAttribute("code", value);
    }
  },
};

index.js文件代碼：

import authority from './Authority';
// eslint-disable-next-line func-names
const install = function(Vue) {
  Vue.directive('authority', authority);
};

if (window.Vue) {
  window.authority = authority;
  Vue.use(install); // eslint-disable-line
}

authority.install = install;
export default authority;

（備注：權(quán)限點(diǎn)集合permissionData在登錄時(shí)已經(jīng)存到localStorage里面了唱歧，取值宪摧，直接JSON.parse(localStorage.getItem('permissionData'))）
三粒竖、main.js文件里引入：

import AuthorityDirective from '@/directive/Authority/index.js';  // 自定義指令
Vue.use(AuthorityDirective);

四、使用：

<el-button type="primary" v-authority="['Table_Write']">show</el-button>

補(bǔ)充：
權(quán)限點(diǎn)集合是一個(gè)純數(shù)組集合几于，該數(shù)據(jù)模擬從后臺(tái)獲取到的數(shù)據(jù)：

permissionData = ['Table_Write', 'Table_Read', 'Form_Write', 'Form_Read']

獲取到后蕊苗，在登錄時(shí)立即存入localStorage。

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