vue 利用指令控制按钮权限

1.定义指令

具体代码。

import Vue from 'vue'

const permission = Vue.directive('permission', {
    inserted: function (el, binding, vnode) {
        const value = binding.value
        if (!value || !Vue.prototype.$_hasPermission(value)) {
            el.parentNode.removeChild(el)
        }

    }
})

Vue.prototype.$_hasPermission = function (value) {
    let isExiting = false
    // 把后台返回的按钮列表存在session中 ==>[aa,bb,cc]
    let btnPermission = JSON.parse(sessionStorage.getItem('btnList'))
    if (btnPermission === undefined || btnPermission === null) {
        return false
    }
    // 判断 binding.value 是否在数组btnPermission中
    for (let i = 0; i < btnPermission.length; i++) {
        if (value === btnPermission[i]) {
            isExiting = true
            break
        }
    }
    return isExiting
}

export { permission }

2.在mian.js中注册

3.使用

<el-button type="primary" @click="init()" v-permission="'queryBtn'">查询</el-button>