一、组件间通信（父组件 --> 子组件）
步骤：
①父组件在调用子组件 传值
<child-component myValue="123"> </child-component>
②在子组件中 获取父组件传来的值
Vue.component('child-component',{
props:['myValue'],
template:''
})
<!doctype html> <html> <head> <meta charset="UTF-8"> <title>父传子</title> <script src="js/vue.js"></script> </head> <body> <div id="container"> <p>{{msg}}</p> <parent-component></parent-component> </div> <script> // 在vue中一切都是组件 //父传子 Vue.component("parent-component",{ data:function(){ return { gift:"传家宝" } }, template:` <div> <h1>这是父组件</h1> <hr> <child-component v-bind:myValue="gift"></child-component> </div> ` }) Vue.component("child-component",{ props:["myValue"], template:` <div> <h1>这是子组件</h1> <p>{{"父传递的值："+myValue}}</p> </div> ` }) new Vue({ el:"#container", data:{ msg:"Hello VueJs" } }) </script> </body> </html>
myValue是属性名，必须都一样……拿data中的用v-bind:或者：
props是property属性,是个数组
<!doctype html> <html> <head> <meta charset="UTF-8"> <title>父子之间通信练习</title> <script src="js/vue.js"></script> </head> <body> <div id="container"> <p>{{msg}}</p> <my-login></my-login> </div> <script> /* 登录窗口 创建4个组件，分别是my-label my-input my-button my-login(复合组件) */ Vue.component("my-label",{ props:["myLabel"], template:` <div> <label>{{myLabel}}</label> </div> ` }) Vue.component("my-input",{ template:` <div> <input type="text"/> </div> ` }) Vue.component("my-button",{ props:["myButton"], template:` <div> <button>{{myButton}}</button> </div> ` }) //复合组件 Vue.component("my-login",{ data:function(){ return { uname:"用户名", upwd:"密码", login:"登录", register:"注册" } }, template:` <div> <my-label v-bind:myLabel="uname"></my-label> <my-input></my-input> <my-label v-bind:myLabel="upwd"></my-label> <my-input></my-input> <my-button v-bind:myButton="login"></my-button> <my-button v-bind:myButton="register"></my-button> </div> ` }) new Vue({ el:"#container", data:{ msg:"Hello VueJs" } }) </script> </body> </html>
<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <script src="js/vue.js"></script> <title></title> </head> <body> <div id="container"> <my-login></my-login> </div> <script> Vue.component('my-label',{ props:['labelName'], template:'<label>{{labelName}}</label>' }) Vue.component('my-input',{ props:['tips'], template:'<input type="text" :placeholder="tips"/>' }) Vue.component('my-button',{ props:['btnName'], template:'<button>{{btnName}}</button>' }) Vue.component('my-login',{ template:` <form> <my-label labelName="用户名"></my-label> <my-input tips="请输入用户名"></my-input> <br/> <my-label labelName="密码"></my-label> <my-input tips="请输入密码"></my-input> <br/> <my-button btnName="登录"></my-button> <my-button btnName="注册"></my-button> </form> ` }) new Vue({ el: '#container', data: { msg: 'Hello Vue' } }) </script> </body> </html>
要拿到data中的数据就要v-bind,否则就不用