confirm() means confirmation box
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>confirm</title>
</head>
<body>
<script>
var con=confirm("do you like to study javascript?");
if (con) {
document.write("I love javascript!");
}
else{
document.write("I love other lanuages!");
}
</script>
</body>
</html> 
prompt means message prompt box
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>confirm</title>
</head>
<body>
<script>
var pro=prompt("what is your name?");
document.write(pro);
</script>
</body>
</html> 
window.open(uri,name,attr)
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>confirm</title>
</head>
<body>
<a href="#" title="http://www.cnblogs.com/yuzheCyril/">click me</a>
<script>
var link=document.getElementsByTagName("a")[0];
link.onclick=function(){window.open(link.title,"blog","width=400px,height=400px");}
</script>
</body>
</html> window.close() closes the window
The above is the relevant content of the JavaScript pop-up basics introduced by the editor. I hope it will be helpful to you!
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
