1、获得窗口长宽高
$(window).width();//浏览器当前窗口可视区域宽度
$(document).width();//浏览器窗口文档的宽度
$(document.body).width();//浏览器当前窗口body的宽度
2、offset属性
包含2个属性：top和left
例子：
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>offset demo</title>
<style>
p {
margin-left: 10px;
}
</style>
<script src="https://code.jquery.com/jquery-1.10.2.js"></script>
</head>
<body>
<p>Hello</p><p>2nd Paragraph</p>
<script>
var p = $( "p:last" );
var offset = p.offset();
p.html( "left: " + offset.left + ", top: " + offset.top );
</script>
</body>
</html>
3、scrollTop()和scrollLeft()属性（注意：如果窗口不滚动或者非常高，那就是0）
<!doctype html> <html lang="en"> <head> <meta charset="utf-8"> <title>scrollLeft demo</title> <style> p { margin: 10px; padding: 5px; border: 2px solid #666; } </style> <script src="https://code.jquery.com/jquery-1.10.2.js"></script> </head> <body> <p>Hello</p><p></p> <script> var p = $( "p:first" ); $( "p:last" ).text( "scrollLeft:" + p.scrollLeft() ); </script> </body> </html>
4、split()
var str="a,a,a,a,a,a,a,a,a,a,a,a,a,a,a,a,a";
var arr=str.split("/");
console.log(arr);
console.log(str.length);
5、join()
var arr = new Array(3)
arr[0] = "George"
arr[1] = "John"
arr[2] = "Thomas"
document.write(arr.join("."))
6、substring()
var str="abcdefg";
var ob=str.substring(0,5);
console.log(ob);
7、replace()
var str="1996-4-6";
var ob=str.replace(/-/g,"");
console.log(ob);
8、indexOf()(注意：对大小写敏感)
function IndexDemo(str2){
var str1 = "BABEBIBOBUBABEBIBOBU"
var s = str1.indexOf(str2);
return(s);
}
还有更多笔记会在后续补充！