监听
<div id="app">
3.1415926
</div>
var vm = null;
window.onload = function(){
vm = new Vue({
el: "#app",
data: {
age: "",
name: "",
obj: {
value: "",
name: ""
}
},
watch: {
age: function(newValue, oldValue){
console.log("监听年龄修改")
},
name: function(newValue, oldValue){
console.log("监听姓名修改")
},
obj: {
handler: (newValue, oldValue) => {
console.log("obj 属性监听");
},
// deep: true 表示监听对象的属性变化，执行handler,获取newValue
// deep: false 关闭监听，看不到属性变化，不执行handler. 数组无需此设置
deep: true,
},
}
methods: {
fun1(){},
fun2: function(){}
}
});
}
// 全局监听
Vue.$watch("number", function(data){
return ....
})
属性获取
<div id="app">
3.1415926
</div>
var vm = null;
window.onload = function(){
vm = new Vue({
el: "#app",
data: {
age: "",
name: "",
obj: {
value: "",
name: ""
}
},
name: "aaaa",
methods: {
fun1(){},
fun2: function(){}
}
});
}
手动挂载Vue实例
vm.$mount("app");
new Vue({}).$mount("app");
属性增删改
<div id="app">
3.1415926
</div>
var vm = null;
window.onload = function(){
vm = new Vue({
el: "#app",
data: {
age: "",
name: "",
obj: {
value: "",
name: ""
}
},
name: "aaaa",
methods: {
add(){
// this.obj.age = 12; 无效
this.$set(this.obj,"age",12);
},
del: function(){
this.$delete(this.obj,"age");
},
update(){
this.obj.age = 20;
}
}
});
}
指令+指令生命周期
<div id="app">
<input v-focus>
<p v-hello>12</p>
<p v-hello:wds>12</p>
<p v-hello2>12</p>
</div>
var vm = null;
window.onload = function(){
vm = new Vue({
el: "#app",
data: {
age: "",
name: "",
obj: {
value: "",
name: ""
}
},
name: "aaaa",
methods: {},
direactives: {
focus: {
inserted(el){ el.focus(); // 页面打开输入框即获得焦点 },
}
}
});
}
Vue.directive('hello',{
bind(el, binding){},
insert(){}
});
Vue.directive('hello2',{
bind(el, binding){},
inserted(){},
update(){}
});
组件
全局写法
- 方式1
var myComponent = Vue.extend({
template: '<h1>hello</h1>'
});
Vue.component('hello', myComponent);
- 方式2
Vue.component('hello', {template: '<h1>hello</h1>'});
局部组件
直接字符串指定 template
有独立data数据
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>权限首页</title>
<!-- 引入样式 -->
<link rel="stylesheet" href="https://unpkg.com/element-ui/lib/theme-chalk/index.css"/>
</head>
<body>
<div id="app">
<div>
<hello></hello>
</div>
</div>
<script src="https://unpkg.com/vue/dist/vue.js"></script>
<!-- 引入组件库 -->
<script src="https://unpkg.com/element-ui/lib/index.js"></script>
<script>
var vm =new Vue({
el: '#app',
data: {
},
methods: {
},
components: {
'hello': {
template: '<h1></h1>',
data() {
return {
message: 'hello'
}
}
}
}
})
</script>
</body>
</html>
最核心的代码：
components: {
'hello': {
template: '<h1></h1>',
data() {
return {
message: 'hello'
}
}
}
}
使用：
<hello></hello>
html 指定 template
template 内容较多时，写在 string 中跟定很麻烦。
直接可以借助 html 元素来实现。
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>权限首页</title>
<!-- 引入样式 -->
<link rel="stylesheet" href="https://unpkg.com/element-ui/lib/theme-chalk/index.css"/>
<script src="https://unpkg.com/vue/dist/vue.js"></script>
<!-- 引入组件库 -->
<script src="https://unpkg.com/element-ui/lib/index.js"></script>
</head>
<body>
<template id="address">
<span>
my address is
</span>
</template>
<div id="app">
<my-address></my-address>
</div>
<script>
var vm =new Vue({
el: '#app',
data: {
},
methods: {
},
components: {
'my-address': {
template: '#address',
data() {
return {
info: '2133'
}
}
}
}
})
</script>
</body>
</html>
注意点：
（1）component 的组件名尽量不要和其他元素重复，会报错
（2）template 的内容需要有 root 元素，纯文本会报错。
vue 使用 element-ui form valid 校验功能
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>权限首页</title>
<!-- 引入样式 -->
<link rel="stylesheet" href="https://unpkg.com/element-ui/lib/theme-chalk/index.css"/>
<script src="https://unpkg.com/vue/dist/vue.js"></script>
<!-- 引入组件库 -->
<script src="https://unpkg.com/element-ui/lib/index.js"></script>
</head>
<body>
<div id="app">
<el-form :model="ruleForm" :rules="rules" ref="ruleForm" label-width="100px" class="demo-ruleForm">
<el-form-item label="活动名称" prop="name">
<el-input v-model="ruleForm.name"></el-input>
</el-form-item>
<el-form-item label="活动区域" prop="region">
<el-select v-model="ruleForm.region" placeholder="请选择活动区域">
<el-option label="区域一" value="shanghai"></el-option>
<el-option label="区域二" value="beijing"></el-option>
</el-select>
</el-form-item>
<el-form-item label="活动时间" required>
<el-col :span="11">
<el-form-item prop="date1">
<el-date-picker type="date" placeholder="选择日期" v-model="ruleForm.date1" style="width: 100%;"></el-date-picker>
</el-form-item>
</el-col>
<el-col class="line" :span="2">-</el-col>
<el-col :span="11">
<el-form-item prop="date2">
<el-time-picker placeholder="选择时间" v-model="ruleForm.date2" style="width: 100%;"></el-time-picker>
</el-form-item>
</el-col>
</el-form-item>
<el-form-item label="即时配送" prop="delivery">
<el-switch v-model="ruleForm.delivery"></el-switch>
</el-form-item>
<el-form-item label="活动性质" prop="type">
<el-checkbox-group v-model="ruleForm.type">
<el-checkbox label="美食/餐厅线上活动" name="type"></el-checkbox>
<el-checkbox label="地推活动" name="type"></el-checkbox>
<el-checkbox label="线下主题活动" name="type"></el-checkbox>
<el-checkbox label="单纯品牌曝光" name="type"></el-checkbox>
</el-checkbox-group>
</el-form-item>
<el-form-item label="特殊资源" prop="resource">
<el-radio-group v-model="ruleForm.resource">
<el-radio label="线上品牌商赞助"></el-radio>
<el-radio label="线下场地免费"></el-radio>
</el-radio-group>
</el-form-item>
<el-form-item label="活动形式" prop="desc">
<el-input type="textarea" v-model="ruleForm.desc"></el-input>
</el-form-item>
<el-form-item>
<el-button type="primary" @click="submitForm('ruleForm')">立即创建</el-button>
<el-button @click="resetForm('ruleForm')">重置</el-button>
</el-form-item>
</el-form>
</div>
<script>
var vm =new Vue({
el: '#app',
data() {
return {
ruleForm: {
name: '',
region: '',
date1: '',
date2: '',
delivery: false,
type: [],
resource: '',
desc: ''
},
rules: {
name: [
{ required: true, message: '请输入活动名称', trigger: 'blur' },
{ min: 3, max: 5, message: '长度在 3 到 5 个字符', trigger: 'blur' }
],
region: [
{ required: true, message: '请选择活动区域', trigger: 'change' }
],
date1: [
{ type: 'date', required: true, message: '请选择日期', trigger: 'change' }
],
date2: [
{ type: 'date', required: true, message: '请选择时间', trigger: 'change' }
],
type: [
{ type: 'array', required: true, message: '请至少选择一个活动性质', trigger: 'change' }
],
resource: [
{ required: true, message: '请选择活动资源', trigger: 'change' }
],
desc: [
{ required: true, message: '请填写活动形式', trigger: 'blur' }
]
}
};
},
methods: {
submitForm(formName) {
this.$refs[formName].validate((valid) => {
if (valid) {
alert('submit!');
} else {
console.log('error submit!!');
return false;
}
});
},
resetForm(formName) {
this.$refs[formName].resetFields();
}
}
})
</script>
</body>
</html>
或者下面这样也可以:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>权限首页</title>
<!-- 引入样式 -->
<link rel="stylesheet" href="https://unpkg.com/element-ui/lib/theme-chalk/index.css"/>
<script src="https://unpkg.com/vue/dist/vue.js"></script>
<!-- 引入组件库 -->
<script src="https://unpkg.com/element-ui/lib/index.js"></script>
<!-- 解决 es6 语法问题-->
<!-- <script src="https://unpkg.com/babel-standalone@6.15.0/babel.min.js"></script>-->
<!-- <script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.4.4/babel.min.js"></script>-->
</head>
<body>
<div id="app">
<el-form :model="ruleForm" :rules="rules" ref="ruleForm" label-width="100px" class="demo-ruleForm">
<el-form-item label="活动名称" prop="name">
<el-input v-model="ruleForm.name"></el-input>
</el-form-item>
<el-form-item label="活动区域" prop="region">
<el-select v-model="ruleForm.region" placeholder="请选择活动区域">
<el-option label="区域一" value="shanghai"></el-option>
<el-option label="区域二" value="beijing"></el-option>
</el-select>
</el-form-item>
<el-form-item label="活动时间" required>
<el-col :span="11">
<el-form-item prop="date1">
<el-date-picker type="date" placeholder="选择日期" v-model="ruleForm.date1"
style="width: 100%;"></el-date-picker>
</el-form-item>
</el-col>
<el-col class="line" :span="2">-</el-col>
<el-col :span="11">
<el-form-item prop="date2">
<el-time-picker placeholder="选择时间" v-model="ruleForm.date2" style="width: 100%;"></el-time-picker>
</el-form-item>
</el-col>
</el-form-item>
<el-form-item label="即时配送" prop="delivery">
<el-switch v-model="ruleForm.delivery"></el-switch>
</el-form-item>
<el-form-item label="活动性质" prop="type">
<el-checkbox-group v-model="ruleForm.type">
<el-checkbox label="美食/餐厅线上活动" name="type"></el-checkbox>
<el-checkbox label="地推活动" name="type"></el-checkbox>
<el-checkbox label="线下主题活动" name="type"></el-checkbox>
<el-checkbox label="单纯品牌曝光" name="type"></el-checkbox>
</el-checkbox-group>
</el-form-item>
<el-form-item label="特殊资源" prop="resource">
<el-radio-group v-model="ruleForm.resource">
<el-radio label="线上品牌商赞助"></el-radio>
<el-radio label="线下场地免费"></el-radio>
</el-radio-group>
</el-form-item>
<el-form-item label="活动形式" prop="desc">
<el-input type="textarea" v-model="ruleForm.desc"></el-input>
</el-form-item>
<el-form-item>
<el-button type="primary" @click="submitForm('ruleForm')">立即创建</el-button>
<el-button @click="resetForm('ruleForm')">重置</el-button>
</el-form-item>
</el-form>
消息：
</div>
<script>
var vm = new Vue({
el: '#app',
data: {
message: '测试一下',
ruleForm: {
name: '',
region: '',
date1: '',
date2: '',
delivery: false,
type: [],
resource: '',
desc: ''
},
rules: {
name: [
{required: true, message: '请输入活动名称', trigger: 'blur'},
{min: 3, max: 5, message: '长度在 3 到 5 个字符', trigger: 'blur'}
],
region: [
{required: true, message: '请选择活动区域', trigger: 'change'}
],
date1: [
{type: 'date', required: true, message: '请选择日期', trigger: 'change'}
],
date2: [
{type: 'date', required: true, message: '请选择时间', trigger: 'change'}
],
type: [
{type: 'array', required: true, message: '请至少选择一个活动性质', trigger: 'change'}
],
resource: [
{required: true, message: '请选择活动资源', trigger: 'change'}
],
desc: [
{required: true, message: '请填写活动形式', trigger: 'blur'}
]
}
},
methods: {
submitForm(formName) {
this.$refs[formName].validate((valid) => {
if (valid) {
alert('submit!');
} else {
console.log('error submit!!');
return false;
}
});
},
resetForm(formName) {
this.$refs[formName].resetFields();
}
}
})
</script>
</body>
</html>
参考资料
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