【转】译- 26 个 jQuery使用技巧
1. 禁用右键点击(Disable right-click)
$(document).ready( function (){ $(document).bind( "contextmenu" , function (e){ return false ; }); }); |
2. 禁用搜索文本框
$(document).ready( function () { $( "input.text1" ).val( "Enter your search text here" ); textFill($( 'input.text1' )); }); function textFill(input){ //input focus text function var originalvalue = input.val(); input.focus( function (){ if ( $.trim(input.val()) == originalvalue ){ input.val( '' ); } }); input.blur( function (){ if ( $.trim(input.val()) == '' ){ input.val(originalvalue); } }); } |
3. 新窗口打开链接
$(document).ready( function () { //Example 1: Every link will open in a new window $( 'a[href^="http://"]' ).attr( "target" , "_blank" ); //Example 2: Links with the rel="external" attribute will only open in a new window $( 'a[@rel$=' external ']' ).click( function (){ this .target = "_blank" ; }); }); // how to use <a href= "http://www.opensourcehunter.com" rel= "external" >open link</a> |
4. 检测浏览器
$(document).ready(function() { // Target Firefox 2 and above if ($.browser.mozilla && $.browser.version >= "1.8" ){ // do something } // Target Safari if( $.browser.safari ){ // do something } // Target Chrome if( $.browser.chrome){ // do something } // Target Camino if( $.browser.camino){ // do something } // Target Opera if( $.browser.opera){ // do something } // Target IE6 and below if ($.browser.msie && $.browser.version <= 6 ){ // do something } // Target anything above IE6 if ($.browser.msie && $.browser.version > 6){ // do something } });
5. 预加载图片(Preloading images)
$(document).ready( function () { jQuery.preloadImages = function () { for ( var i = 0; i<arguments.length; i++)= "" {= "" jquery( "<img=" ">" ).attr( "src" , arguments[i]); } } // how to use $.preloadImages( "image1.jpg" ); }); </arguments.length;> |
6. 样式筛选(CSS Style switcher)
$(document).ready(function() { $("a.Styleswitcher").click(function() { //swicth the LINK REL attribute with the value in A REL attribute $('link[rel=stylesheet]').attr('href' , $(this).attr('rel')); }); // how to use // place this in your header <link rel="stylesheet" href="default.css" type="text/css"> // the links <a href="#" class="Styleswitcher" rel="default.css">Default Theme</a> <a href="#" class="Styleswitcher" rel="red.css">Red Theme</a> <a href="#" class="Styleswitcher" rel="blue.css">Blue Theme</a> });
7. 列高度相同
8. 字体大小调整(Font resizing)
$(document).ready( function () { // Reset the font size(back to default) var originalFontSize = $( 'html' ).css( 'font-size' ); $( ".resetFont" ).click( function (){ $( 'html' ).css( 'font-size' , originalFontSize); }); // Increase the font size(bigger font0 $( ".increaseFont" ).click( function (){ var currentFontSize = $( 'html' ).css( 'font-size' ); var currentFontSizeNum = parseFloat(currentFontSize, 10); var newFontSize = currentFontSizeNum*1.2; $( 'html' ).css( 'font-size' , newFontSize); return false ; }); // Decrease the font size(smaller font) $( ".decreaseFont" ).click( function (){ var currentFontSize = $( 'html' ).css( 'font-size' ); var currentFontSizeNum = parseFloat(currentFontSize, 10); var newFontSize = currentFontSizeNum*0.8; $( 'html' ).css( 'font-size' , newFontSize); return false ; }); }); |
9. 返回页面顶部(Smooth(animated) page scroll)
11. 获取鼠标的xy坐标(Get the mouse cursor x and y axis)
$(document).ready( function () { $().mousemove( function (e){ //display the x and y axis values inside the div with the id XY $( '#XY' ).html( "X Axis : " + e.pageX + " | Y Axis " + e.pageY); }); // how to use <div id= "XY" ></div> }); |
12. 验证元素是否为空(Verify if an Element is empty)
$(document).ready( function () { if ($( '#id' ).html()) { // do something } }); |
13. 替换元素(Replace a element)
$(document).ready( function () { $( '#id' ).replaceWith( ' <div>I have been replaced</div> ' ); }); |
14. 延迟加载(jQuery timer callback functions)
$(document).ready( function () { window.setTimeout( function () { // do something }, 1000); }); |
15. 移除单词(Remove a word)
$(document).ready(function() { var el = $('#id'); el.html(el.html().replace(/word/ig, "")); });
16. 验证元素是否存在(Verify that an element exists in jQuery)
$(document).ready( function () { if ($( '#id' ).length) { // do something } }); |
17. 使整个DIV可点击(Make the entire DIV clickable)
$(document).ready( function () { $( "div" ).click( function (){ //get the url from href attribute and launch the url window.location=$( this ).find( "a" ).attr( "href" ); return false ; }); // how to use <div><a href= "index.html" >home</a></div> }); |
18. id和class切换(Switch between classes or id’s when resizing the window)
$(document).ready( function () { function checkWindowSize() { if ( $(window).width() > 1200 ) { $( 'body' ).addClass( 'large' ); } else { $( 'body' ).removeClass( 'large' ); } } $(window).resize(checkWindowSize); }); |
19. 克隆对象(Clone a object)
20. 使元素居中屏幕(Center an element on the screen)
$(document).ready( function () { jQuery.fn.center = function () { this .css( "position" , "absolute" ); this .css( "top" , ( $(window).height() - this .height() ) / 2+$(window).scrollTop() + "px" ); this .css( "left" , ( $(window).width() - this .width() ) / 2+$(window).scrollLeft() + "px" ); return this ; } $( "#id" ).center(); }); |
21. 自定义选择器(Write our own selector)
$(document).ready( function () { $.extend($.expr[ ':' ], { moreThen1000px: function (a) { return $(a).width() > 1000; } }); $( '.box:moreThen1000px' ).click( function () { // creating a simple js alert box alert( 'The element that you have clicked is over 1000 pixels wide' ); }); }); |
22. 统计元素个数(Count a element)
23. 自定义Bullets(Use Your Own Bullets)
24. 引用google分发的jQuery(Let Google host jQuery for you)
//Example 1 <script src= "http://www.google.com/jsapi" ></script> <script type= "text/javascript" > google.load( "jquery" , "1.2.6" ); google.setOnLoadCallback( function () { // do something }); </script><script src= "http://ajax.googleapis.com/ajax/libs/jquery/1.2.6/jquery.min.js" type= "text/javascript" ></script> // Example 2:(the best and fastest way) <script type= "text/javascript" src= "http://ajax.googleapis.com/ajax/libs/jquery/1.2.6/jquery.min.js" ></script> |
25. 禁用jQuery动画(Disable jQuery animations)
$(document).ready(function() { jQuery.fx.off = true; });
26. 防止不兼容冲突(No conflict-mode)
$(document).ready( function () { var $jq = jQuery.noConflict(); $jq( '#id' ).show(); }); |
jquery 速查表:
原贴地址:http://blog.csdn.net/sunboy_2050/article/details/8179162
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