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一、 路由和传值
二、案例
三、案例存在无法刷新问题 一、 路由和传值 当某个组件可以根据某些参数值的不同#xff0c;展示不同效果时#xff0c;需要用到动态路由。
例如#xff1a;访问网站看到课程列表#xff0c;点击某个课程#xff0c;就可以跳转到课程详…目录
一、 路由和传值
二、案例
三、案例存在无法刷新问题 一、 路由和传值 当某个组件可以根据某些参数值的不同展示不同效果时需要用到动态路由。
例如访问网站看到课程列表点击某个课程就可以跳转到课程详细页面根据课程ID不同展示不同数据。 如何来设置动态路由呢 定义路由可以使用别名定义路由、可以实现动态值
const router new VueRouter({routes: [{ path: /, component: Home},{ path: /course, component: Course, name: Course}{ path: /detail/:id, component: Detail, name: Detail}],
})
HTML展示前三个就写死了
divrouter-link to/首页/router-linkrouter-link to/course课程/router-linkrouter-link to/detail/123课程/router-linkrouter-link :to{path:/course}课程/router-linkrouter-link :to{path:/course?size19page2}课程/router-linkrouter-link :to{path:/course, query:{size:19,page:2}课程/router-linkrouter-link :to{name:Course}课程/router-linkrouter-link :to{name:Course, query:{size:19,page:2} }课程/router-linkrouter-link :to{path:/detail/22,query:{size:123}}Linux/router-linkrouter-link :to{name:Detail,params:{id:3}, query:{size:29}}网络安全/router-link
/divh1内容区域/h1
router-view/router-view
组件获取URL传值和GET参数 const Detail {data: function () {return {title: 详细页面,paramDict: null,queryDict: null,}},created: function () {this.paramDict this.$route.params;this.queryDict this.$route.query;// 发送axios请求},template: divh2{{title}}/h2div当前请求的数据 {{paramDict}} {{queryDict}}/div/div}
二、案例
结合上面的路由实现案例 !DOCTYPE html
html langen
headmeta charsetUTF-8titleTitle/titlestylebody {margin: 0;}.container {width: 1100px;margin: 0 auto;}.menu {height: 48px;background-color: #499ef3;line-height: 48px;}.menu a {color: white;text-decoration: none;padding: 0 10px;}.course-list {display: flex;flex-wrap: wrap;justify-content: flex-start;}.course-list .item {width: 248px;padding: 10px;border: 1px solid #dddddd;margin-right: 5px;margin-top: 10px;}.course-list .item img {width: 100%;height: 120px;}/stylescript src./js/vue.min.js/scriptscript src./js/vue-router.js/scriptscript src./js/axios.min.js/script
/head
body
div idappdiv classmenudiv classcontainerrouter-link to/申请入会/router-linkrouter-link to/home首页/router-linkrouter-link to/course写真/router-linkrouter-link to/news资讯/router-link/div/divdiv classcontainerrouter-view/router-view/div/divscriptconst Home {data: function () {return {title: 欢迎进入交友平台}},template: h2{{title}}/h2}const Course {data: function () {return {courseList: []}},created: function () {/* 组件创建完成之后自动触发【此时组件的对象已创建但还未将页面先关的DOM创建并显示在页面上】- 可以去操作组件对象例如this.courseList [11,22,33]- 不可以去操作DOM例如document.getElementById 未创建*/axios({method: get,url: https://api.luffycity.com/api/v1/course/actual/?limit5offset0,headers: {Content-Type: application/json}}).then((res) {this.courseList res.data.data.result;})},mounted: function () {/* DOM对象已在页面上生成此时就可以 */},template: div classcourse-listdiv classitem v-foritem in courseListrouter-link :to{name:Detail,params:{id:item.id}}img :srcitem.cover alta{{item.name}}/a/router-link/div/div}const News {data: function () {return {dataList: []}},created: function () {/* 组件创建完成之后自动触发【此时组件的对象已创建但还未将页面先关的DOM创建并显示在页面上】- 可以去操作组件对象例如this.courseList [11,22,33]- 不可以去操作DOM例如document.getElementById 未创建*/axios({method: get,url: https://api.luffycity.com/api/v1/course/actual/?limit5offset10,headers: {Content-Type: application/json}}).then((res) {this.dataList res.data.data.result;})},template: ulli v-foritem in dataList{{item.name}}/li/ul}const Detail {data: function () {return {title: 详细页面,courseId: null}},created: function () {this.courseId this.$route.params.id;// 此处可以根据课程ID发送ajax请求获取课程详细信息},template: divh2课程详细页面/h2div当前课程ID为{{courseId}}/div/div}const router new VueRouter({routes: [{path: /, component: Home},{path: /home, component: Home},{path: /course, component: Course},{path: /news, component: News},{path: /detail/:id, component: Detail, name: Detail}],//mode: history})var app new Vue({el: #app,data: {},methods: {},router: router})
/script
/body
/html
三、案例存在无法刷新问题
上述编写案例是没有问题但如果在开发中会涉及到 同一个路由的跳转默认不会重新加载页面数据无法获取。
例如在详细页面再出现一个课程推荐即在课程详细点击推荐的课程后跳转到课程详细页面课程ID不同此时课程的ID还是原来加载的ID无法获取推荐课程的ID。
如何解决呢
在课程详细的组件中设置watch属性即可watch会监测$route 值一旦发生变化就执行相应的函数。
const Detail {data: function () {return {title: 详细页面,courseId: null,}},created: function () {this.courseId this.$route.params.id;this.getCourseDetail();},watch: {$route:function(to, from) {this.courseId to.params.id;// this.getCourseDetail();}},methods: {getCourseDetail: function () {// 根据this.courseId获取课程详细信息}},template: divh2{{title}}/h2div当前请求的数据 {{paramDict}} {{queryDict}}/div/div
} !DOCTYPE html
html langen
headmeta charsetUTF-8titleTitle/titlestylebody {margin: 0;}.container {width: 1100px;margin: 0 auto;}.menu {height: 48px;background-color: #499ef3;line-height: 48px;}.menu a {color: white;text-decoration: none;padding: 0 10px;}.course-list {display: flex;flex-wrap: wrap;justify-content: flex-start;}.course-list .item {width: 248px;padding: 10px;border: 1px solid #dddddd;margin-right: 5px;margin-top: 10px;}.course-list .item img {width: 100%;height: 120px;}/stylescript src./js/vue.min.js/scriptscript src./js/vue-router.js/scriptscript src./js/axios.min.js/script
/head
body
div idappdiv classmenudiv classcontainerrouter-link to/路飞学城/router-linkrouter-link to/home首页/router-linkrouter-link to/course课程/router-linkrouter-link to/news资讯/router-link/div/divdiv classcontainerrouter-view/router-view/div/divscriptconst Home {data: function () {return {title: 欢迎使用路飞学城}},template: h2{{title}}/h2}const Course {data: function () {return {courseList: []}},created: function () {/* 组件创建完成之后自动触发【此时组件的对象已创建但还未将页面先关的DOM创建并显示在页面上】- 可以去操作组件对象例如this.courseList [11,22,33]- 不可以去操作DOM例如document.getElementById 未创建*/axios({method: get,url: https://api.luffycity.com/api/v1/course/actual/?limit5offset0,headers: {Content-Type: application/json}}).then((res) {this.courseList res.data.data.result;})},mounted: function () {/* DOM对象已在页面上生成此时就可以 */},template: div classcourse-listdiv classitem v-foritem in courseListrouter-link :to{name:Detail,params:{id:item.id}}img :srcitem.cover alta{{item.name}}/a/router-link/div/div}const News {data: function () {return {dataList: []}},created: function () {/* 组件创建完成之后自动触发【此时组件的对象已创建但还未将页面先关的DOM创建并显示在页面上】- 可以去操作组件对象例如this.courseList [11,22,33]- 不可以去操作DOM例如document.getElementById 未创建*/axios({method: get,url: https://api.luffycity.com/api/v1/course/actual/?limit5offset10,headers: {Content-Type: application/json}}).then((res) {this.dataList res.data.data.result;})},template: ulli v-foritem in dataList{{item.name}}/li/ul}const Detail {data: function () {return {title: 详细页面,courseId: null,hotCourseList: [{id: 1000, title: python全栈开发},{id: 2000, title: 异步编程},],}},created: function () {this.courseId this.$route.params.id;// 此处可以根据课程ID发送ajax请求获取课程详细信息this.getCourseDetail();},watch: {$route: function (to, from) {this.courseId to.params.id;this.getCourseDetail();}},methods: {getCourseDetail: function () {// 根据this.courseId获取课程详细信息}},template: divh2课程详细页面/h2div当前课程ID为{{courseId}}/divh3课程推荐/h3ulli v-foritem in hotCourseListrouter-link :to{name:Detail, params:{id:item.id}}{{item.title}}/router-link/li/ul/div}const router new VueRouter({routes: [{path: /, component: Home},{path: /home, component: Home},{path: /course, component: Course},{path: /news, component: News},{path: /detail:id, component: Detail, name: Detail}],//mode: history})var app new Vue({el: #app,data: {},methods: {},router: router})
/script
/body
/html
