使用JavaScript实时的计算用户当前输入的字符数函数代码：
<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>JavaScript统计字符数</title> <script language="javascript"> function CountWords(obj, show_id){ var fullStr = obj.value; var charCount = fullStr.length; var rExp = /[^A-Za-z0-9]/gi; var spacesStr = fullStr.replace(rExp, ' '); var cleanedStr = spacesStr + ' '; do{ var old_str = cleanedStr; cleanedStrcleanedStr = cleanedStr.replace(' ', ' '); }while( old_str != cleanedStr ); var splitString = cleanedStr.split(' '); document.getElementById(show_id).innerHTML=charCount; } </script> </head> <body> <form> <textarea cols="40" rows="5" name="x" onkeyup="CountWords(this,'show')" /> </textarea> </form> <div id="show">0</div> </body> </html>
javascript实现统计字符数很简单，上面分享给大家的代码可以直接使用，希望对大家的学习有所帮助。