Rails每周闲碎(五): Http, Html, Browser, etc-优快云博客

本文探讨了前端开发中的关键技巧，包括解决浏览器缓存问题的方法、URL编码原理及其在HTML中的应用、利用label元素提高用户体验、Textarea元素的事件监听、HTTP连接保持机制、以及使用CDATA段确保脚本兼容性。

1. 浏览器的回退

为了避免数据不一致问题，我想到的只有强制禁用浏览器cache（cache control：no cache, no store）。

2. Why and how the url is encoded:

http://www.blooberry.com/indexdot/html/topics/urlencoding.htm

and so why some special characters needed to be encoded in HTML? space -> &nbsp. :)

3. label

html中的label之所以要ID对应，是因为

The label element does not render as anything special for the user. However, it provides a usability improvement for mouse users, because if the user clicks on the text within the label element, it toggles the control.

<label for="male">Male</label>
<input type="radio" name="sex" id="male" />

4. textarea

oninput和onpropertychange (IE)事件。

5. http keepAlive

Http connection is NOT dropped, but is instead kept open. When the client sends another request, it uses the same connection. This will continue until either the client or the server decides that the conversation is over, and one of them drops the connection.

在Http1.1中，这是默认的。

6. cdata

对XHTML兼容，又对现在不支持XHTML的浏览器兼容的方式。

<script type="text/javascript">
//<![CDATA[                                            
function compare(a,b)
{
if (a < b)
   {alert("a小于b");}
else if (a>b)
   {alert("a大于b");}
else
   {alert("a等于b");}
}
//]]>                                      
</script>

http://www.cnblogs.com/scugzbc/archive/2008/07/13/1242063.html