Vue 使用计时器实现跑马灯效果，代码如下所示：
<!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">
[removed][removed]
<link href="lib/bootstrap-3.3.7/css/bo
