jquery question and answer knowledge compilation_jquery

Get ID: $(this).attr("id");
:not usage
1. List usage

Copy code The code is as follows:

var notList = [];
notList.push("#<%=txtSuggest.ClientID %>");
var textElements = $("input[type=text]:not(" notList ")");
var firstFocusItem = null;
//Traverse the elements of Type=Text
textElements.each(function(i) {
//TODO
});

2. Exclusive usage

Copy code The code is as follows:

$("table[id^=tb]:not([id=tbBasicInfo])").each(function() {
alert($(this ).attr("id"));
});

If [] is not added, $("table[id^=tb]:not(tbBasicInfo)"), This is not possible
At this time, not is based on the former tb with id^=tb: not operation
Restore BackGround-Color to the original color
background-color:transparent
Remove the underline of Href , visited styles
a, a:visited{ text-decoration: none;}
Remove Li’s point style
li{margin:0; padding:0; list-sytle:none}
Get a certain style in the Style of the current object
$("#divDept").css("display")
CSS BackGround Url cannot be displayed
Because IE browser and FF have different processing paths There are some differences. Modify the boxy.css code under IE as follows.

Copy code The code is as follows:

.boxy-wrapper .top-left { background: url ('images/boxy-nw.png'); }
.boxy-wrapper .top-right { background: url('images/boxy-ne.png'); }
.boxy-wrapper .bottom -right { background: url('images/boxy-se.png'); }
.boxy-wrapper .bottom-left { background: url('images/boxy-sw.png'); }
/* IE6 7 hacks for the border. IE7 should support this natively but fails in conjuction with modal blackout bg. */
/* NB: these must be absolute paths or URLs to your images */
.boxy- wrapper .top-left { #background: none; #filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='images/boxy-nw.png'); }
.boxy-wrapper .top-right { #background : none; #filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='images/boxy-ne.png'); }
.boxy-wrapper .bottom-right { #background: none; #filter:progid: DXImageTransform.Microsoft.AlphaImageLoader(src='images/boxy-se.png'); }
.boxy-wrapper .bottom-left { #background: none; #filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src= 'images/boxy-sw.png'); }

This will display normally under IE.
Get Table object
$("table[id=tableID]") or $("#tableID")CountDown usage

Copy code The code is as follows:

$.getJSON(

loginServiceUrl,{ method: "Logout"},

function(result) {

if (result.Url != null) {

$("#transfer").countdown({
until: " 5s",
expiryUrl: result.Url,
onTick: function(periods){
$(this).text(periods[6]);
}
});
}
});

There is a problem with text() value in Google Chrome, change it to val()
Problem with window maximization in Google Chrome
The following js code works fine in FF and IE

Copy code The code is as follows:

if (window.screen) {
var myw = screen.availWidth;
var myh = screen.availHeight;
window.resizeTo(400, 400);
window.moveTo(0, 0);
}

• 在Chrome中resizeTo,resize都是没有效果的。

Issue 2091:window.resizeTo() doesn't have any effect

• By Design we don't support resize/move for tabs, only constrained windows.

http://www.cnblogs.com/lonz/articles/381022.html

• javascript resizeTo bug

http://code.google.com/p/chromium/issues/detail?id=11523

• 在google chrome/safari 中textbox默认是可以自由拉长的，为何控制不让其自由拉长。
  

解决方案：

CSS to disable resizing

textarea {
resize: none;
}
<textarea <SPAN style="COLOR: #0000ff">name</SPAN>="<SPAN style="COLOR: #8b0000">foo</SPAN>">

textarea[<span style="COLOR: #0000ff">name</span>=foo] {
resize: none;
}

HTML is <textarea id="<SPAN style="COLOR: #8b0000">foo</SPAN>">)

#foo {
resize: none;
}

 

• JS压缩工具

http://www.brainjar.com/js/crunch/demo.html

缺点：

会把正则表达式中类似*/去除

Sample:

value = s.replace(/^0*/, '');

After Compress:

value = s.replace(/^0, '');

• parseInt() 和 Number() 兩個函數有什么不同？

http://hi.baidu.com/iloverobot/blog/item/bd3ed651ffd362868c5430bf.html

• JSON 问题

http://blog.csdn.net/chinaontology/archive/2007/12/30/2004871.aspx

• CSS置底的提示框

• 大文件上传 进度条显示 （仿csdn资源上传效果）

http://www.cnblogs.com/zengxiangzhan/archive/2010/01/14/1647866.html

• 可编辑的Input

http://acme.com/javascript/

• jquery设置html头信息

http://home.phpchina.com/space.php?uid=155537&do=blog&id=182698

• jQuery与prototype(ajaxpro)冲突的解决方法

http://www.cnblogs.com/sxlfybb/archive/2009/06/04/1495995.html

• 利用jQuery + Handler(ashx) + LINQ 實現 Autocomplete

http://www.dotblogs.com.tw/puma/archive/2009/03/10/7426.aspx

• jquery ajax 中文乱码

http://phpxiaoxin.javaeye.com/blog/350544

• Ajax中文乱码原因分析及解决方案

http://hi.baidu.com/sihillver/blog/item/4d6f32f592920325bc3109d7.html

• 打造基于jQuery的高性能TreeView

http://kb.cnblogs.com/page/50337/

http://kb.cnblogs.com/page/53517/

• 利用jQuery实现更简单的Ajax跨域请求

http://kb.cnblogs.com/page/53433/

• Jquery.Ajax 读取XML

<span style="COLOR: #800000">first</span> <span style="COLOR: #800000">of</span> <span style="COLOR: #800000">all</span> <span style="COLOR: #800000">sorry</span> <span style="COLOR: #800000">about</span> <span style="COLOR: #800000">my</span> <span style="COLOR: #800000">english</span>, <span style="COLOR: #800000">it</span>'<span style="COLOR: #800000">s</span> <span style="COLOR: #800000">not</span> <span style="COLOR: #800000">my</span> <span style="COLOR: #800000">native</span> <span style="COLOR: #800000">lengauge</span>...
<span style="COLOR: #800000">i</span> <span style="COLOR: #800000">have</span> <span style="COLOR: #800000">a</span> <span style="COLOR: #800000">xml</span> <span style="COLOR: #800000">file</span> <span style="COLOR: #800000">that</span> <span style="COLOR: #800000">i</span>'<span style="COLOR: #800000">m</span> <span style="COLOR: #800000">reading</span> <span style="COLOR: #800000">with</span> <span style="COLOR: #800000">the</span> <span style="COLOR: #800000">sample</span> <span style="COLOR: #800000">code</span> <span style="COLOR: #800000">above</span>... 

<span style="COLOR: #800000">but</span> <span style="COLOR: #800000">when</span> <span style="COLOR: #800000">i</span> <span style="COLOR: #800000">try</span> <span style="COLOR: #800000">to</span> <span style="COLOR: #800000">read</span> <span style="COLOR: #800000">it</span> <span style="COLOR: #800000">from</span> <span style="COLOR: #800000">a</span> <span style="COLOR: #800000">service</span> <span style="COLOR: #800000">web</span> <span style="COLOR: #800000">page</span> (<span style="COLOR: #800000"><a href="http://www.google.com/ig/api?weather=Buenos%20A">http</a></span>://<span style="COLOR: #800000">www</span>.<span style="COLOR: #800000">google</span>.<span style="COLOR: #800000">com</span>/<span style="COLOR: #800000">ig</span>/<span style="COLOR: #800000">api</span>?<span style="COLOR: #800000">weather</span>=<span style="COLOR: #800000">Buenos</span>%<span style="COLOR: #800000">20A</span>...), 

<span style="COLOR: #800000">it</span> <span style="COLOR: #800000">doesn</span>'<span style="COLOR: #800000">t</span> <span style="COLOR: #800000">show</span> <span style="COLOR: #800000">anything</span>... <span style="COLOR: #800000">and</span> <span style="COLOR: #800000">if</span> <span style="COLOR: #800000">i</span> <span style="COLOR: #800000">write</span> <span style="COLOR: #800000">the</span> <span style="COLOR: #800000">same</span> <span style="COLOR: #800000">content</span> <span style="COLOR: #800000">of</span> <span style="COLOR: #800000">this</span> <span style="COLOR: #800000">page</span> <span style="COLOR: #800000">in</span> <span style="COLOR: #800000">a</span> <span style="COLOR: #800000">xml</span> <span style="COLOR: #800000">file</span> <span style="COLOR: #800000">in</span> <span style="COLOR: #800000">my</span> <span style="COLOR: #800000">pc</span>, 

<span style="COLOR: #800000">it</span> <span style="COLOR: #800000">works</span> <span style="COLOR: #800000">perfectly</span>... <span style="COLOR: #800000">i</span> <span style="COLOR: #800000">dont</span> <span style="COLOR: #800000">know</span> <span style="COLOR: #800000">what</span> <span style="COLOR: #800000">am</span> <span style="COLOR: #800000">i</span> <span style="COLOR: #800000">doing</span> <span style="COLOR: #800000">wrong</span>
<span style="COLOR: #800000">i</span> <span style="COLOR: #800000">let</span> <span style="COLOR: #800000">u</span> <span style="COLOR: #800000">the</span> <span style="COLOR: #800000">code</span> <span style="COLOR: #800000">that</span> <span style="COLOR: #800000">i</span>'<span style="COLOR: #800000">m</span> <span style="COLOR: #800000">using</span> <span style="COLOR: #800000">maybe</span> <span style="COLOR: #800000">u</span> <span style="COLOR: #800000">could</span> <span style="COLOR: #800000">help</span> <span style="COLOR: #800000">me</span>
<span style="COLOR: #800000">function</span> <span style="COLOR: #800000">clima</span>(){
$.<span style="COLOR: #ff0000">ajax</span>(<span style="COLOR: #0000ff">{
  type: "GET",
  url: 'http://www.google.com/ig/api?weather=Buenos%20Aires',
  dataType: "xml",
  success: function(data){
  var $weather = $(data).find('current_conditions')
   console.log($weather)</span>;
  }
 });
}

<span style="COLOR: #800000">function</span> <span style="COLOR: #800000">clima</span>() {
$.<span style="COLOR: #ff0000">ajax</span>(<span style="COLOR: #0000ff">{
  type: "GET",
  dataType: "xml",
  url: 'http://www.google.com/ig/api?weather=Buenos%20Aires',
  success: function(xml) {
  var weather = $(xml).find("current_conditions").find("temp_c").attr("data")</span>;
<span style="COLOR: #ff0000">   alert</span>(<span style="COLOR: #0000ff">"Prognostico para hoy: " + weather + " grados")</span>;
  }
 });
}

 

• FullSize：一个新的IMG标签属性（附带JQuery实现）

http://css9.net/img-fullsize/

http://css9.net/wp-content/uploads/2009/04/fullsize/example.html

有关于$.ajaxSetup和$.get的问题

在Common.js中使用

  $.ajaxSetup({
    url: "<span style="COLOR: #8b0000">…..</span>",
    type: "<span style="COLOR: #8b0000">POST</span>",
    cache: <span style="COLOR: #0000ff">true</span>,
    dataType: "<span style="COLOR: #8b0000">json</span>"
  });
  $.ajax({
    data: { cityCode: cityCode, flag: flag },
    success: <span style="COLOR: #0000ff">function</span>(areaList) { …}

  });

在PageA页面引入Common.js

   然后在脚本段中使用 $.get(url);

  此处url调用的是一个aspx页面，显示结果为无数据加载！（正常情况：有数据加载。）

  然后经过使用IE8的开发人员工具，进行Trace Error.最终发现原因错误信息（如下）

  "Invalid JSON:

"form1" method="post" action="ajax_select

那么如何解决呢？

原因：

        肯定是请求数据类型有问题？

解决方案：

        1.在Page A 页面脚本段 $.get(url，“html”); 

          因为$.get中的Data是可选项，现在确定原因之后，我们就来预定义好DataType

       结果：OK

分析源由：

     是因为$.ajaxSetup是用全局设定的，所以全局已经设定了DataType:JSON了。

     那Page A 页面的$.get()肯定受及影响。

最终解决方案：

    改Common.js,去掉ajaxSetup全局设定

       $.ajax({ url: "…..", type: "POST", cache: true, dataType: "json",data: { cityCode: cityCode, flag: flag }, success: function(areaList) { …} });

    结果：OK