不定参数
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>fun</title>
</head>
<body>
<script>
function foo(name, age) {
console.log('hello'+name+age);
}
console.log(foo.length);
//多个值相加，不定参数的使用
function add() {
var sum = 0;
for (var i = 0; i<arguments.length;i++){
sum+=arguments[i];
}
return sum;
}
add(1,2,3,4,5);
//匿名函数
var func1 = function (arg) {
return arg;
}
func1("xiaoming");
</script>
</body>
</html>
setInterval
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>BOM对象</title>
<style>
#id1{
width: 200px;
height: 30px;
}
</style>
</head>
<body>
<script>
/*window.alert("fengfeng")
var a = window.confirm("hello")
console.log(a)
window.prompt("zhangyafeng")
open("http://www.baidu.com")*/
var click1;
function begin() {
clearInterval(click1);
showtime();
click1 = setInterval(showtime,1000);
}
function showtime() {
var time = new Date().toLocaleString();
var ele = document.getElementById("id1");
ele.value=time;
}
function stopAction() {
clearInterval(click1);
//click1=undefined;
}
function feng() {
alert("xiaoming")
}
//三秒钟后执行
var c = setTimeout(feng,3000);
clearTimeout(c);
</script>
<input type="text" id="id1" onclick="begin()">
<button onclick="stopAction()">停止</button>
</body>
</html>
History和Location
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>history</title>
</head>
<body>
<script>
function intoaction() {
history.forward();
}
//刷新
location.reload();
location.assign("http://www.baidu.com");
location.replace("http://www.baidu.com");
</script>
<a href="history1.html">click</a>
<button onclick="intoaction()">into</button>
</body>
</html>
