课程名称:Vue Element+Node.js开发企业通用管理后台系统(第16章)
课程章节: 第16章 Vue进阶(上)
主讲老师:Sam
课程内容:
今天学习的内容包括:
- Vue进阶(上)
课程收获:
- Vue.extend 用法
Vue.extend 使用基础 Vue 构造器,创建一个“子类”。参数是一个包含组件选项的对象。
<html>
<head>
<title>Vue.extend 用法</title>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
<div id="root">
<Test :msg="message"></Test>
</div>
<script>
const component = Vue.extend({
template: '<div>{{msg}}</div>',
props: {
msg: {
type: String,
default: 'default message'
}
},
name: 'Test'
})
Vue.component('Test')
new Vue({
el: '#root',
data() {
return {
message: "Test Extend Component"
}
}
})
</script>
</body>
</html>
2.Vue.extend 进阶用法
<html>
<head>
<title>Vue.extend 用法2</title>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<style>
#loading-wrapper {
position: fixed;
top: 0;
left: 0;
display: flex;
justify-content: center;
align-items: center;
width: 100%;
height: 100%;
background: rgba(0,0,0,.7);
color: #fff;
}
</style>
</head>
<body>
<div id="root">
<button @click="showLoading">显示Loading</button>
</div>
<script>
function Loading(msg) {
const LoadingComponent = Vue.extend({
template: '<div id="loading-wrapper">{{msg}}</div>',
props: {
msg: {
type: String,
default: msg
}
},
name: 'LoadingComponent'
})
const div = document.createElement('div')
div.setAttribute('id', 'loading-wrapper')
document.body.append(div)
new LoadingComponent().$mount('#loading-wrapper')
return () => {
document.body.removeChild(document.getElementById('loading-wrapper'))
}
}
Vue.prototype.$loading = Loading
new Vue({
el: '#root',
methods: {
showLoading() {
const hide = this.$loading('正在加载,请稍等...')
setTimeout(() => {
hide()
}, 2000)
}
}
})
</script>
</body>
</html>
- Vue.use 用法
Vue.use 用于安装 Vue.js 插件。如果插件是一个对象,必须提供 install 方法。如果插件是一个函数,它会被作为 install 方法。install 方法调用时,会将 Vue 作为参数传入。
<html>
<head>
<title>Vue.use 用法</title>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<style>
#loading-wrapper {
position: fixed;
top: 0;
left: 0;
display: flex;
justify-content: center;
align-items: center;
width: 100%;
height: 100%;
background: rgba(0,0,0,.7);
color: #fff;
}
</style>
</head>
<body>
<div id="root">
<button @click="showLoading">显示Loading</button>
</div>
<script>
const loadingPlugin = {
install: function(vm) {
const LoadingComponent = vm.extend({
template: '<div id="loading-wrapper">{{msg}}</div>',
props: {
msg: {
type: String,
default: 'loading...'
}
}
}, 'LoadingComponent')
function Loading(msg) {
const div = document.createElement('div')
div.setAttribute('id', 'loading-wrapper')
document.body.append(div)
new LoadingComponent({
props: {
msg: {
type: String,
default: msg
}
}
}).$mount('#loading-wrapper')
return () => {
document.body.removeChild(document.getElementById('loading-wrapper'))
}
}
vm.prototype.$loading = Loading
}
}
Vue.use(loadingPlugin)
new Vue({
el: '#root',
methods: {
showLoading() {
const hide = this.$loading('正在加载,请稍等...')
setTimeout(() => {
hide()
}, 2000)
}
}
})
</script>
</body>
</html>
最后,附上课程截图 ending~