带Jquery的实时字符计数表

Posted 2021-02-25

$('#contentbox').keyup(function(){} - contentbox is the ID of the textbox. Using $(this).val() getting the textbox value. bar is the div ID of the count meter $('#bar').animate() increasing the width.

---javascript---
 
<script type="text/javascript" src="http://ajax.googleapis.com/
ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function()
{
$("#contentbox").keyup(function()
{
var box=$(this).val();
var main = box.length *100;
var value= (main / 145);
var count= 145 - box.length;
 
if(box.length <= 145)
{
$('#count').html(count);
$('#bar').animate(
{
"width": value+'%',
}, 1);
}
else
{
alert(' Full ');
}
return false;
});
 
});
</script>
 
 
---html---
 
<div>
<div id="count">145</div>
<div id="barbox"><div id="bar"></div></div>
</div>
<textarea id="contentbox"></textarea>
 
 
---css---
 
#bar
{
background-color:#5fbbde;
width:0px;
height:16px;
}
#barbox
{
float:right;
height:16px;
background-color:#FFFFFF;
width:100px;
border:solid 2px #000;
margin-right:3px;
-webkit-border-radius:5px;-moz-border-radius:5px;
}
#count
{
float:right; margin-right:8px;
font-family:'Georgia', Times New Roman, Times, serif;
font-size:16px;
font-weight:bold;
color:#666666
}
#contentbox
{
width:450px; height:50px;
border:solid 2px #006699;
font-family:Arial, Helvetica, sans-serif;
font-size:14px;
}