随机点名小demo

$(function (){
        let id;
        //利用数组将存储名字
        let Names=["高佳铄","张豪宇","姚晓轩","何则润","宋光杰","范维瑄","毕观昌","高博文","鲁彦彦","宋景浩","安键炜","王运硕","王子豪",
            "高慧敏","吕广睿","张学文","王贺","武涛","陈凯","李金涛","熊鹏举","毛聪","龚超","徐同硕","王梦龙","李佳欣","刘博洋","费世洁","闫亿洋"];
        //定义一个方法用来显示每次随机名字
        function abc (){
            //计算下标
            let num = Math.ceil(Math.random()*Names.length);
            //更改页面指定标签内容
            $("h1").text(Names[num]);
        }
        //设置开始按钮
        $("input:first").click(function (){
            //将开始按钮隐藏
            $(this).css("display","none");
            //删除之前的图片
            $("img").remove();
            //使用全局函数setInterval(函数,多少毫秒执行一次)
            id= setInterval(abc,20);
        })
        //设置结束按钮
        $("input:last").click(function (){
            //结束setInterval()函数
            clearInterval(id);
            //将开始按钮再次显示
            $("input:first").css("display","block");
        })
    })