1,编写permission.ts文件
在src/utils/permission.ts
import type { Directive } from "vue";
export const permission:Directive={
// 在绑定元素的父组件被挂载后调用
mounted(el,binding){
// el:指令所绑定的元素,可以用来直接操作 DOM
// binding:我们通过自定义指令传递的各种参数
const {value}=binding;
// 这里模拟后端返回来的数据,一般是登录过后存在缓存或者pinia里
const permissionButton = ['add', 'edit']
if (value && value instanceof Array && value.length > 0) {
// 有权限
const hasPermission = permissionButton.some((role: string) => {
console.log('role',role);
return value.includes(role);
});
// 没有权限
if (!hasPermission) {
el.style.display = 'none';
}
}
}
}
2,在main.ts注册
import { createApp, type Directive } from 'vue'
import pinia from './stores'
import App from './App.vue'
import router from './router'
// 导入自定义指令
import * as directives from '@/utils/permission'
const app = createApp(App)
app.use(pinia)
app.use(router)
app.mount('#app')
//挂载自定义指令
Object.keys(directives).forEach(key => {
app.directive(key, (directives as { [key: string]: Directive })[key]);
});
3,在任意vue文件里使用
<template>
<div >
<button v-permission="['add']">增加</button >
<button v-permission="['delete']">删除</button >
<button v-permission="['edit']">修改</button >
<button v-permission="['query']">查看</button >
<button v-permission="['export']">导出</button >
</div>
</template>
效果图: