JS应用正则表达式转换大小写示例

时间:2022-03-21 08:11:33

js中应用正则表达式转换大小写,代码很简单,看代码:

以下首字母大写,其它字母小写

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<script type="text/javascript">
function replaceReg(reg,str){
str = str.toLowerCase();
return str.replace(reg,function(m){return m.toUpperCase()})
}
var reg = /\b(\w)|\s(\w)/g;
var str = 'share javascript';
var str2 = 'SHARE JAVASCRIPT';
var str3 = 'Test \n str is no good!';
var str4 = 'final test';
document.write(replaceReg(reg,str)+'<br />');
document.write(replaceReg(reg,str2)+'<br />');
document.write(replaceReg(reg,str3)+'<br />');
document.write(replaceReg(reg,str4)+'<br />');
</script>

以下只首字母大写,其它字母大小写不作处理

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<script language="JavaScript">
<!--
var str="xi nAn shi you xUe yuan china people"
alert(str.replace(/\s[a-z]/g,function($1){return $1.toLocaleUpperCase()}).replace(/^[a-
z]/,function($1){return $1.toLocaleUpperCase()}))
//-->
</script>

运行代码,直接看效果就可以了!