【推荐】50个JQuery代码技巧让你变成js高手(1)
.filter(":not(:has(.selected))") //去掉所有不包含class为.selected的元素var allItems = $("div.item"); var keepList = $("div#container1 div.item"); <div>class names: $(formToLookAt + " input:checked").each(function() { keepListkeepList = keepList.filter("." + $(this).attr("name")); });</div>//jQuery 1.4.* includes support for the has method. This method will find //if a an element contains a certain other element class or whatever it is //you are looking for and do anything you want to them. $(6. 如何正确使用ToggleClass
//Toggle class allows you to add or remove a class //from an element depending on the presence of that //class. Where some developers would use: a.hasClass('blueButton') ? a.removeClass('blueButton') : a.addClass('blueButton'); //toggleClass allows you to easily do this using a.toggleClass('blueButton');7. 设置IE指定的功能
if ($.browser.msie) { // Internet Explorer is a sadist. }8. 使用jQuery来替换一个元素
$('#thatdiv').replaceWith('fnuh');9. 验证一个元素是否为空
if ($('#keks').html()) { //Nothing found ;}10. 在无序的set中查找一个元素的索引
$("ul > li").click(function () { var index = $(this).prevAll().length; });11. 绑定一个函数到一个事件
$('#foo').bind('click', function() { alert('User clicked on "foo."'); });12. 添加HTML到一个元素
$(14. 使用过滤器过滤多属性
//This precision-based approached can be useful when you use //lots of similar input elements which have different types var elements = $('#someid input[type=sometype][value=somevalue]').get();15. 使用jQuery预加载图片
jQuery.preloadImages = function() { for(var i = 0; i').attr('src', arguments[i]); } }; // Usage $.preloadImages('image1.gif', '/path/to/image2.png', 'some/image3.jpg');16. 设置任何匹配一个选择器的事件处理程序
$('button.someClass').live('click', someFunction); //Note that in jQuery 1.4.2, the delegate and undelegate options have been //introduced to replace live as they offer better support for context //For example, in terms of a table where before you would use.. // .live() $("table").each(function(){ $("td", this).live("hover", function(){ $(this).toggleClass("hover"); }); }); //Now use.. $("table").delegate("td", "hover", function(){ $(this).toggleClass("hover");});17. 找到被选择到的选项(option)元素
$('#someElement').find('option:selected');18. 隐藏包含特定值的元素
$("p.value:contains('thetextvalue')").hide();19. 自动的滚动到页面特定区域
jQuery.fn.autoscroll = function(selector) { $('html,body').animate( {scrollTop: $(selector).offset().top}, 500 );}//Then to scroll to the class/area you wish to get to like this:$('.area_name').autoscroll();20. 检测各种浏览器
Detect Safari (if( $.browser.safari)),Detect IE6 and over (if ($.browser.msie && $.browser.version > 6 )),Detect IE6 and below (if ($.browser.msie && $.browser.version <= 6 )),Detect FireFox 2 and above (if ($.browser.mozilla && $.browser.version >= '1.8' ))21. 替换字符串中的单词
var el = $('#id');el.html(el.html().replace(/word/ig, ''));22. 关闭右键的菜单
$(document).bind('contextmenu',function(e){ return false; });23. 定义一个定制的选择器
$.expr[':'].mycustomselector = function(element, index, meta, stack){// element- is a DOM element// index - the current loop index in stack// meta - meta data about your selector// stack - stack of all elements to loop// Return true to include current element// Return false to explude current element};// Custom Selector usage:$('.someClasses:test').doSomething();24. 判断一个元素是否存在
if ($('#someDiv').length) {//hooray!!! it exists...}25. 使用jQuery判断鼠标的左右键点击
$("#someelement").live('click', function(e) { if( (!$.browser.msie && e.button == 0) || ($.browser.msie && e.button == 1) ) { alert("Left Mouse Button Clicked"); } else if(e.button == 2) alert("Right Mouse Button Clicked");});（转载注明出处：[url=http://www.a9832.com]博彩网[/url][url=http://www.tswa.org]博彩通[/url]）?
1 楼 raitt79 2012-04-18 这个怎么会一直记得，不知道了查查文档就可以了。