Vue跨域代理配置
本案例需要下载axios库npm install axios
配置参考文档 Vue-Cli devServer.proxy
vue.config.js 是一个可选的配置文件，如果项目的 (和 package.json 同级的) 根目录中存在这个文件，那么它会被 @vue/cli-service 自动加载。你也可以使用 package.json 中的 vue 字段，但是注意这种写法需要你严格遵照 JSON 的格式来写
方法一
在vue.config.js中添加如下配置
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| module.exports = {
devServer:{
proxy:"http://localhost:5000"
}
}
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说明
- 优点：配置简单，请求资源时直接发给
前端（8080）即可
- 缺点：不能配置
多个代理，不能灵活的控制请求是否走代理
- 工作方式：若按照上述配置代理，当请求了前端
不存在的资源时，才会将请求会转发给服务器 （优先匹配前端资源）
方法二
编写vue.config.js配置具体代理规则
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| module.exports = {
devServer: {
proxy: {
'/api1': {
target: 'http://localhost:5000',
pathRewrite: {'^/api1':''},
ws: true,
changeOrigin: true,
},
'/api2': {
target: 'http://localhost:5001',
pathRewrite: {'^/api2': ''},
changeOrigin: true
}
}
}
}
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说明
- 优点：可以配置多个代理，且可以灵活的控制请求是否走代理
- 缺点：配置略微繁琐，请求资源时必须加前缀
vue.config.js
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| module.exports = {
pages: {
index: {
entry: 'src/main.js',
},
},
lintOnSave:false,
devServer: {
proxy: {
'/api1': {
target: 'http://localhost:5000',
pathRewrite:{'^/api1':''},
},
'/api2': {
target: 'http://localhost:5001',
pathRewrite:{'^/api2':''},
}
}
}
}
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src/App.vue
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| <template>
<div>
<button @click="getStudents">获取学生信息</button>
<button @click="getCars">获取汽车信息</button>
</div>
</template>
<script>
import axios from 'axios'
export default {
name:'App',
methods: {
getStudents() {
axios.get('http://localhost:8080/students').then(
response => {
console.log('请求成功了',response.data)
},
error => {
console.log('请求失败了',error.message)
}
)
},
getCars() {
axios.get('http://localhost:8080/demo/cars').then(
response => {
console.log('请求成功了',response.data)
},
error => {
console.log('请求失败了',error.message)
}
)
}
},
}
</script>
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GitHub用户搜索案例
public/index.html
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| <!DOCTYPE html>
<html lang="">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="icon" href="<%= BASE_URL %>favicon.ico">
<link rel="stylesheet" href="<%= BASE_URL %>css/bootstrap.css">
<title><%= htmlWebpackPlugin.options.title %></title>
</head>
<body>
<div id="app"></div>
</body>
</html>
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src/main.js
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| import Vue from 'vue'
import App from './App.vue'
Vue.config.productionTip = false
new Vue({
el:"#app",
render: h => h(App),
beforeCreate(){
Vue.prototype.$bus = this
}
})
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src/App.vue
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| <template>
<div class="container">
<Search/>
<List/>
</div>
</template>
<script>
import Search from './components/Search.vue'
import List from './components/List.vue'
export default {
name:'App',
components:{ Search, List },
}
</script>
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src/components/Search.vue
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| <template>
<section class="jumbotron">
<h3 class="jumbotron-heading">Search Github Users</h3>
<div>
<input type="text" placeholder="enter the name you search" v-model="keyWord"/>
<button @click="searchUsers">Search</button>
</div>
</section>
</template>
<script>
import axios from "axios";
export default {
name: "Search",
data() {
return {
keyWord: "",
};
},
methods: {
searchUsers() {
this.$bus.$emit("updateListData", {
isLoading: true,
errMsg: "",
users: [],
isFirst: false,
});
axios.get(`https://api.github.com/search/users?q=${this.keyWord}`).then(
(response) => {
console.log("请求成功了");
this.$bus.$emit("updateListData", {
isLoading: false,
errMsg: "",
users: response.data.items,
});
},
(error) => {
this.$bus.$emit("updateListData", {
isLoading: false,
errMsg: error.message,
users: [],
});
}
);
},
},
};
</script>
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src/components/List.vue
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| <template>
<div class="row">
<div v-show="info.users.length" class="card"
v-for="user in info.users" :key="user.login">
<a :href="user.html_url" target="_blank">
<img :src="user.avatar_url" style="width: 100px" />
</a>
<p class="card-text">{{ user.login }}</p>
</div>
<h1 v-show="info.isFirst">欢迎使用！</h1>
<h1 v-show="info.isLoading">加载中....</h1>
<h1 v-show="info.errMsg">{{ info.errMsg }}</h1>
</div>
</template>
<script>
export default {
name: "List",
data() {
return {
info: {
isFirst: true,
isLoading: false,
errMsg: "",
users: [],
},
};
},
mounted() {
this.$bus.$on("updateListData", (dataObj) => {
this.info = { ...this.info, ...dataObj };
});
},
};
</script>
<style scoped>
.album {min-height: 50rem;
padding-top: 3rem;padding-bottom: 3rem;background-color: #f7f7f7;}
.card {float: left;width: 33.333%;padding: 0.75rem;margin-bottom: 2rem;
border: 1px solid #efefef;text-align: center;}
.card > img {margin-bottom: 0.75rem;border-radius: 100px;}
.card-text {font-size: 85%;}
</style>
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Slot插槽
<slot>插槽：让父组件可以向子组件指定位置插入html结构，也是一种组件间通信的方式，适用于 父组件 ===> 子组件
分类：默认插槽、具名插槽、作用域插槽
默认插槽
解释
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| 父组件中：
<Category>
<div>html结构1</div>
</Category>
子组件中：Category
<template>
<div>
<slot>插槽默认内容...</slot>
</div>
</template>
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示例
src/App.vue
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| <template>
<div class="container">
<Category title="美食" >
<img src="https://s3.ax1x.com/2021/01/16/srJlq0.jpg" alt="">
</Category>
<Category title="游戏" >
<ul>
<li v-for="(g,index) in games" :key="index">{{g}}</li>
</ul>
</Category>
<Category title="电影">
<video controls src="http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4"></video>
</Category>
</div>
</template>
<script>
import Category from './components/Category'
export default {
name:'App',
components:{ Category },
data() {
return {
foods:['火锅','烧烤','小龙虾','牛排'],
games:['红色警戒','穿越火线','劲舞团','超级玛丽'],
films:['《教父》','《拆弹专家》','《你好，李焕英》','《尚硅谷》']
}
},
}
</script>
<style scoped>.container{display: flex;justify-content: space-around;}</style>
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src/components/Category.vue
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| <template>
<div class="category">
<h3>{{ title }}分类</h3>
<slot>我是一些默认值，当使用者没有传递具体结构时，我会出现</slot>
</div>
</template>
<script>
export default {
name:'Category',
props:['title']
}
</script>
<style scoped>
.category {background-color: skyblue;width: 200px;height: 300px;}
h3 {text-align: center;background-color: orange;}
video {width: 100%;}
img {width: 100%;}
</style>
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具名插槽
父组件指明放入子组件的哪个插槽 slot="footer"，如果是template可以写成v-slot:footer
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| 父组件中：
<Category>
<template slot="center">
<div>html结构1</div>
</template>
<template v-slot:footer>
<div>html结构2</div>
</template>
</Category>
子组件中：
<template>
<div>
<slot name="center">插槽默认内容...</slot>
<slot name="footer">插槽默认内容...</slot>
</div>
</template>
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示例
src/App.vue
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| <template>
<div class="container">
<Category title="美食" >
<img slot="conter" src="https://s3.ax1x.com/2021/01/16/srJlq0.jpg" alt="">
<a slot="footer" href="http://www.atguigu.com">更多美食</a>
</Category>
<Category title="游戏" >
<ul slot="center">
<li v-for="(g,index) in games" :key="index">{{g}}</li>
</ul>
<div class="foot" slot="footer">
<a href="http://www.atguigu.com">单机游戏</a>
<a href="http://www.atguigu.com">网络游戏</a>
</div>
</Category>
<Category title="电影">
<video slot="center" controls src="http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4"></video>
<template v-slot:footer>
<div class="foot">
<a href="http://www.atguigu.com">经典</a>
<a href="http://www.atguigu.com">热门</a>
<a href="http://www.atguigu.com">推荐</a>
</div>
<h4>欢迎前来观影</h4>
</template>
</Category>
</div>
</template>
<script>
import Category from './components/Category'
export default {
name:'App',
components:{Category},
data() {
return {
foods:['火锅','烧烤','小龙虾','牛排'],
games:['红色警戒','穿越火线','劲舞团','超级玛丽'],
films:['《教父》','《拆弹专家》','《你好，李焕英》','《尚硅谷》']
}
},
}
</script>
<style scoped>
.container,.foot{display: flex;justify-content: space-around;}
h4{text-align: center;}
</style>
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src/components/Category.vue
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| <template>
<div class="category">
<h3>{{title}}分类</h3>
<slot name="center">我是一些默认值，当使用者没有传递具体结构时，我会出现1</slot>
<slot name="footer">我是一些默认值，当使用者没有传递具体结构时，我会出现2</slot>
</div>
</template>
<script>
export default {
name:'Category',
props:['title']
}
</script>
<style scoped>
.category{background-color: skyblue;width: 200px;height: 300px;}
h3{text-align: center;background-color: orange;}
video{width: 100%;}
img{width: 100%;}
</style>
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作用域插槽
scope用于父组件往子组件插槽放的html结构接收子组件的数据
理解：数据在组件的自身，但根据数据生成的结构需要组件的使用者来决定（games数据在Category组件中，但使用数据所遍历出来的结构由App组件决定）
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| 父组件中：
<Category>
<template scope="scopeData">
<ul>
<li v-for="g in scopeData.games" :key="g">{{g}}</li>
</ul>
</template>
</Category>
<Category>
<template slot-scope="scopeData">
<h4 v-for="g in scopeData.games" :key="g">{{g}}</h4>
</template>
</Category>
子组件中：
<template>
<div>
<slot :games="games"></slot>
</div>
</template>
<script>
export default {
name:'Category',
props:['title'],
data() {
return {
games:['红色警戒','穿越火线','劲舞团','超级玛丽']
}
},
}
</script>
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注意：关于样式，既可以写在父组件中，解析后放入子组件插槽；也可以放在子组件中，传给子组件再解析
示例
src/App.vue
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| <template>
<div class="container">
<Category title="游戏">
<template scope="atguigu">
<ul>
<li v-for="(g,index) in atguigu.games" :key="index">{{g}}</li>
</ul>
</template>
</Category>
<Category title="游戏">
<template scope="{games}">
<ol>
<li style="color:red" v-for="(g,index) in games" :key="index">{{g}}</li>
</ol>
</template>
</Category>
<Category title="游戏">
<template slot-scope="{games}">
<h4 v-for="(g,index) in games" :key="index">{{g}}</h4>
</template>
</Category>
</div>
</template>
<script>
import Category from './components/Category'
export default {
name:'App',
components:{ Category },
}
</script>
<style scoped>
.container,.foot{display: flex;justify-content: space-around;}
h4{text-align: center;}
</style>
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src/components/Category.vue
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| <template>
<div class="category">
<h3>{{title}}分类</h3>
<slot :games="games" msg="hello">我是默认的一些内容</slot>
</div>
</template>
<script>
export default {
name:'Category',
props:['title'],
data() {
return {
games:['红色警戒','穿越火线','劲舞团','超级玛丽'],
}
},
}
</script>
<style scoped>
.category{background-color: skyblue;width: 200px;height: 300px;}
h3{text-align: center;background-color: orange;}
video{width: 100%;}
img{width: 100%;}
</style>
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