<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script type="text/javascript" src="vue.min.js" ></script>
</head>
<body>
<div id="app">
<input type="button" value="按钮" @click="lang" />
<input type="button" value="按钮" @click="stop" />
<h1 v-text="msg"></h1>
</div>
</body>
<script>
new Vue({
el:"#app",
data:{
msg:"这是一个跑马灯效果！",
intervalId:null
},
methods:{
/* lang(){
console.log(this.msg);
var _this = this;
setInterval(function () {
var start = _this.msg.substring(0,1);
var end = _this.msg.substring(1);
var newMsg = end + start;
_this.msg = newMsg;
},400);
}*/
lang(){
if(this.intervalId != null) return;
console.log(this.msg);
this.intervalId = setInterval(() => {
var start = this.msg.substring(0,1);
var end = this.msg.substring(1);
var newMsg = end + start;
this.msg = newMsg;
},400);
},
stop(){
clearInterval(this.intervalId);
this.intervalId = null;
}
}
});
</script>
</html>
