javascript当中string对象用法-优快云博客

本文链接：https://blog.youkuaiyun.com/mark_to_win/article/details/88621213

3.string对象

例 3.1

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
</HEAD>

<BODY>
<Script>
 var hello = "HELLO mark!"
 with(document) {
 write(hello," ")
 write("马克-to-win第1个字符为："+hello.charAt(0)+" ")
 write("L在第"+hello.indexOf("L")+"个字符"+" ")
 write("L在第"+hello.lastIndexOf("L")+ "个字符"+" ")
 write("k在第"+hello.indexOf("k")+"个字符"+" ")
/*String.fontsize() (Method)
Encapsulates the string within an tag context.*/
 write(hello.fontsize("5")+" ")
/*和Array的slice 一样， fomer包括，latter不包括*/
 write("截取第2至第4个字符:"+hello.substring(1,4)+" ")
/* myString.substr(aStartPosition, aLength)
Argument list: aStartPosition The index of the first character in the substring
aLength The length of the substring
*/
 write("截取从第2个字符开始的3个字符:"+hello.substr(1,4)+" ")
 write("转换为大写："+hello.toUpperCase()+" ")
 write("转换为小写："+hello.toLowerCase()+" ")
 }
</Script>
</BODY>
</HTML>
更多请见：https://blog.youkuaiyun.com/qq_43650923/article/details/100140665