alert("Div1 does not exists"); } 检查id为“div1”的元素是否存在。 jQuery长度示例 jQuery check if an element exists$(document).ready(function(){ $("#buttonDiv1").click(function(){if($('#div1').length){ alert("Div1 exists"); }else{ alert("Div1 does not exists"); } }); $(...
location = window.location, // Map over jQuery in case of overwrite _jQuery = window.jQuery, // Map over the $ in case of overwrite _$ = window.$, // [[Class]] -> type pairs class2type = {}, // List of deleted
$(window).resize(checkWindowSize); }); 19. 克隆对象(Clone a object) $(document).ready(function() {varcloned = $('#id').clone();//how to use}); 20. 使元素居中屏幕(Center an element on the screen) $(document).ready(function() { jQuery.fn.center=function() {this.css("position"...
22. How to check if an element exists 23. Add a JS class to your HTML attribute 24. Return 'false' to prevent default behaviour 25. Shorthand for the ready event 1. Load the framework from Google Code Google have been hosting several JavaScript libraries for a while now on Google Code ...
success:function(res){if(res){return{code:1,message:'xxxxooo'} } }, error:function(xhr){} }; optionsLast=$.extend(optionsDefault,options); $.ajax(optionsLast); }, ooo:function(){...} } 1. 2. 3. 4. 5. 6. 7. 8. 9. ...
( "submit" )will execute thesubmit()method on the element if one exists. When a_defaulthook is specified, the hook is called just prior to checking for and executing the element's default method. If this hook returns the valuefalsethe element's default method will be called; otherwise it...
Check Whether an Element Exists Prior using a HTML element you need to ensure it's part of DOM. if ($("#selector").length) { //do something with element } back to table of contents Use .on() Binding Instead of .click() Using .on() gives you several advantages over using .click...
element.bind( event, deferCallback ) element.data( "bind_once_defer_" + event , defer ); } return defer.done( callback ).promise(); }; The code works as follows: Check if the element already has a deferred attached for the given event if not, create it and make it so it is re...
...也可以使用document.getElementById(“demo”).innerHTML = ret;来展示数据。 ajax_server', name='ajax_server'), 缺陷 对应用Ajax最主要的批评就是,它可能破坏浏览器的后退与加入收藏书签功能。...(例如,当用户在Google Maps中单击后退时,它在一个隐藏的IFRAME中进行搜索,然后将搜索结果反映到Ajax元素...
An ultra-light jQuery plugin that tells you if an element is in the viewport but with a twist. - zeusdeux/isInViewport