【日积月累】DOM window

全局方法

• confirm

if(confirm("是否本人？")){
    console.log("是");
}else{
    console.log("否");
}

• alert

if(true){
    alert("操作失败")
}else{
    console.log("执行操作");
}

• setTimeout

let a = setTimeout("console.log('5 s pass')",5000);
clearTimeout(a)

• setInterval

let a = setInterval("console.log('5 s pass')",5000);
clearInterval(a);