实例
<!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">
<title>1.16</title>
</head>
<body>
<p onclick="alert('不错100分')">我爱玩js</p>
<button onclick="dj()">点击</button>
<button onclick="kaoshi()">考试</button>
</body>
<script>
function dj(){
var i=6;
if(i<5){
alert('数字太小了')
}else{
alert('刚刚好')
}
}
</script>
<script src="static/js/js01.js"></script>
<script>
function kaoshi(){
var grade = 100;
// 这里必须传入true,否则内部除了default外,不会执行任何分支
// 这种情形适用于case 条件是一个条件表达式,而不是一个离散的具体值
switch (true) {
case (grade >= 60 && grade < 80):
console.log('合格');
break;
case (grade >= 80 && grade < 90):
console.log('良好');
break;
case (grade >= 90):
console.log('优秀');
break;
default:
console.log('补考');
}
}
var i = 0;
while (i<10) {
console.log(i);
i++; // 必须要设置循环终止的条件,否则会陷入死循环
}
var cars=["baoma","luhu","benchi"];
for(i=0;i<cars.length;i++)
{
document.write(cars[i]+"<br>")
}
</script>
<script type="text/javascript">
var arr = new Array(6)//slice的用法
arr[0] = "George"
arr[1] = "John"
arr[2] = "Thomas"
arr[3] = "James"
arr[4] = "Adrew"
arr[5] = "Martin"
document.write(arr + "<br />")
document.write(arr.slice(2,4) + "<br />")
document.write(arr)
</script>
<script>
</script>
</html>运行实例 »
点击 "运行实例" 按钮查看在线实例
