合适的位置接口获取权限信息，比如登录接口

####这里简化了代码######
function _queryPermissionList(to, next) {
return new Promise((resolve, reject) => {
queryPermissionList().then(res => {
let permissionsList = res.permissionList;
store.commit("user/SET_PERMISSION", permissionsList ? permissionsList : []);
resolve()
}).catch(err => {
reject(err)
})
})
}

 

 

// 定义一些和权限有关的 Vue指令

// 必须包含列出的所有权限，元素才显示
export const hasPermission = {
install(Vue) {
Vue.directive('hasPermission', {
bind(el, binding, vnode) {
const permissions = vnode.context.$store.state.user.permissions
const value = binding.value
let flag = true
for (const v of value) {
if (!permissions.includes(v)) {
flag = false
}
}
if (!flag) {
if (!el.parentNode) {
el.style.display = 'none'
} else {
el.parentNode.removeChild(el)
}
}
}
})
}
}

// 当不包含列出的权限时，渲染该元素
export const hasNoPermission = {
install(Vue) {
Vue.directive('hasNoPermission', {
bind(el, binding, vnode) {
const permissions = vnode.context.$store.state.user.permissions

const value = binding.value
let flag = true
for (const v of value) {
if (permissions.includes(v)) {
flag = false
}
}
if (!flag) {
if (!el.parentNode) {
el.style.display = 'none'
} else {
el.parentNode.removeChild(el)
}
}
}
})
}
}

// 只要包含列出的任意一个权限，元素就会显示
export const hasAnyPermission = {
install(Vue) {
Vue.directive('hasAnyPermission', {
bind(el, binding, vnode) {
const permissions = vnode.context.$store.state.user.permissions
const value = binding.value
let flag = false
for (const v of value) {
if (permissions.includes(v)) {
flag = true
}
}
if (!flag) {
if (!el.parentNode) {
el.style.display = 'none'
} else {
el.parentNode.removeChild(el)
}
}
}
})
}
}