JS replace()方法-字符串首字母大写

replace() 方法用于在字符串中用一些字符替换另一些字符,或替换一个与正则表达式匹配的子串。

replace()方法有两个参数,第一个参数是正则表达式,正则表达式如果带全局标志/g,则是代表替换所有匹配的字符串,否则是只替换第一个匹配串。
第二个参数可以是字符串,也可以是函数。$1、$2...表示与正则表达式匹配的文本。

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源代码如下:

 1 <!DOCTYPE html>
 2 <html>
 3 <head>
 4 <meta http-equiv="Content-Type" Content="text/html; charset=utf-8;">
 5 <title> JS replace方法 </title>
 6 <meta name="author" content="rainna" />
 7 <meta name="keywords" content="rainna's js lib" />
 8 <meta name="description" content="JS replace方法" />
 9 </head>
10 <body>
11 <h1>使用JS的replace()方法把所有单词的首字母大写</h1>
12 <p>replace() 方法用于在字符串中用一些字符替换另一些字符,或替换一个与正则表达式匹配的子串。<br />replace()方法有两个参数,第一个参数是正则表达式,正则表达式如果带全局标志/g,则是代表替换所有匹配的字符串,否则是只替换第一个匹配串。<br />
13 第二个参数可以是字符串,也可以是函数。$1、$2...表示与正则表达式匹配的文本。</p>
14 <p id="word">There are many ways we can make a difference. Global change starts with you. Sign up for our free newsletter today.</p>
15 <a href="" id="replaceBtn">替换</a>
16 
17 <script>
18 var replaceFunc = function(){
19     var word = document.getElementById('word').innerText.toString(),
20         btn = document.getElementById('replaceBtn');
21     
22     var func1 = function(str){
23         return str.replace(/\b\w+\b/g,function(word){
24              return word.substring(0,1).toUpperCase() + word.substring(1);
25         });
26     }
27     
28     btn.onclick = function(event){
29         event.preventDefault();
30         console.log(func1(word));
31     }    
32 }
33 
34 replaceFunc();
35 </script>
36 </body>
37 </html>

 

posted @ 2014-08-04 21:37  ZRainna  阅读(5819)  评论(0编辑  收藏  举报