1.警告框
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
</head>
<body>
<script>
window.alert("hello,world");
</script>
</body>
</html>2.确认框
代码为
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
</head>
<body>
<button onclick="action()">请随便输入</button>
<span id="show"> 这里显示你的输入</span>
<script>
function action(){
var x = window.confirm("确认付款？")
if(x ==true){
document.getElementById("show").innerHTML = "确认";
}else{
document.getElementById("show").innerHTML = "不买";
}
}
</script>
</body>
</html>3.提示输入框
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
</head>
<body>
<button onclick="action()">请随便输入</button>
<span id="show"> 这里显示你的输入</span>
<script>
function action(){
var x = window.prompt("请输入你的名字");
document.getElementById("show").innerHTML = x;
}
</script>
</body>
</html>总结：
1.其实上面的window.都可以去掉
2.js里面很多有window和document开头，这是套路