正文
Vue-使用计时器实现跑马灯效果
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<!DOCTYPE html>
<html lang="en"> <head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<script src="../Vue/vue.js"></script>
<link href="lib/bootstrap-3.3.7/css/bootstrap.css" rel="stylesheet">
<title>跑马灯</title>
<style type="text/css">
#app button {
outline: none;
}
</style>
</head> <body>
<div id="app" style="margin: 20px">
<button class="btn btn-info" @click='lang'>飞的速度</button>
<button class="btn btn-info" @click='stop'>猥琐发育</button>
<div>
<h4 style="color: red">{{msg}}</h4>
<img src="buxiang.jpeg" alt="">
</div> </div>
<script>
var ve = new Vue({
el: '#app',
data: {
msg: '只有飞速的旋转，才可以止住为的泪水，忘记你的模样。。。',
intervalId: null,
},
methods: {
// 动起来
lang() {
if (this.intervalId != null) return;
this.intervalId = setInterval(() => {
// 获取第一个字符
var start = this.msg.substring(0, 1)
// 获取第一个字符后面的所有字符
var end = this.msg.substring(1) this.msg = end + start }, 300)
},
// 停止运动
stop() {
clearInterval(this.intervalId)
// 重新赋值null
this.intervalId = null
}
}
})
</script>
<script src="lib/jquery/jquery-3.4.1.js"></script>
<script src="lib/bootstrap-3.3.7/js/bootstrap.js"></script>
</body> </html>
效果
