26个Jquery使用技巧

发布时间:2016-12-9 13:57:06 编辑:www.fx114.net 分享查询网我要评论
本篇文章主要介绍了"26个Jquery使用技巧",主要涉及到26个Jquery使用技巧方面的内容,对于26个Jquery使用技巧感兴趣的同学可以参考一下。

点击打开链接 1. 禁用右键点击(Disable right-click) [javascript] view plaincopyprint? $(document).ready(function(){ $(document).bind("contextmenu",function(e){ return false; }); }); $(document).ready(function(){ $(document).bind("contextmenu",function(e){ return false; }); }); 2. 禁用搜索文本框(Disappearing search field text) [javascript] view plaincopyprint? $(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); } }); } $(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(Opening links in a new window) [javascript] view plaincopyprint? $(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> $(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(Detect browser) [javascript] view plaincopyprint? $(document).ready(function() { // Target Firefox 2 and above if ($.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 } }); $(document).ready(function() { // Target Firefox 2 and above if ($.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) [javascript] view plaincopyprint? $(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;> $(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) [javascript] view plaincopyprint? $(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> }); $(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(Columns of equal height) [javascript] view plaincopyprint? $(document).ready(function() { function equalHeight(group) { tallest = 0; group.each(function() { thisHeight = $(this).height(); if(thisHeight > tallest) { tallest = thisHeight; } }); group.height(tallest); } // how to use $(document).ready(function() { equalHeight($(".left")); equalHeight($(".right")); }); }); $(document).ready(function() { function equalHeight(group) { tallest = 0; group.each(function() { thisHeight = $(this).height(); if(thisHeight > tallest) { tallest = thisHeight; } }); group.height(tallest); } // how to use $(document).ready(function() { equalHeight($(".left")); equalHeight($(".right")); }); }); 8. 字体大小调整(Font resizing) [javascript] view plaincopyprint? $(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; }); }); $(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) [javascript] view plaincopyprint? $(document).ready(function() { $('a[href*=#]').click(function() { if (location.pathname.replace(/^\//,'') == this.pathname.replace(/^\//,'') && location.hostname == this.hostname) { var $target = $(this.hash); $target = $target.length && $target || $('[name=' + this.hash.slice(1) +']'); if ($target.length) { var targetOffset = $target.offset().top; $('html,body') .animate({scrollTop: targetOffset}, 900); return false; } } }); // how to use // place this where you want to scroll to <a name="top"></a> // the link <a href="#top">go to top</a> }); $(document).ready(function() { $('a[href*=#]').click(function() { if (location.pathname.replace(/^\//,'') == this.pathname.replace(/^\//,'') && location.hostname == this.hostname) { var $target = $(this.hash); $target = $target.length && $target || $('[name=' + this.hash.slice(1) +']'); if ($target.length) { var targetOffset = $target.offset().top; $('html,body') .animate({scrollTop: targetOffset}, 900); return false; } } }); // how to use // place this where you want to scroll to <a name="top"></a> // the link <a href="#top">go to top</a> }); 11. 获取鼠标的xy坐标(Get the mouse cursor x and y axis) [javascript] view plaincopyprint? $(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> }); $(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) [javascript] view plaincopyprint? $(document).ready(function() { if ($('#id').html()) { // do something } }); $(document).ready(function() { if ($('#id').html()) { // do something } }); 13. 替换元素(Replace a element) [javascript] view plaincopyprint? $(document).ready(function() { $('#id').replaceWith(' <div>I have been replaced</div> '); }); $(document).ready(function() { $('#id').replaceWith(' <div>I have been replaced</div> '); }); 14. 延迟加载(jQuery timer callback functions) [javascript] view plaincopyprint? $(document).ready(function() { window.setTimeout(function() { // do something }, 1000); }); $(document).ready(function() { window.setTimeout(function() { // do something }, 1000); }); 15. 移除单词(Remove a word) [javascript] view plaincopyprint? $(document).ready(function() { var el = $('#id'); el.html(el.html().replace(/word/ig, "")); }); $(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) [javascript] view plaincopyprint? $(document).ready(function() { if ($('#id').length) { // do something } }); $(document).ready(function() { if ($('#id').length) { // do something } }); 17. 使整个DIV可点击(Make the entire DIV clickable) [javascript] view plaincopyprint? $(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> }); $(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) [javascript] view plaincopyprint? $(document).ready(function() { function checkWindowSize() { if ( $(window).width() > 1200 ) { $('body').addClass('large'); } else { $('body').removeClass('large'); } } $(window).resize(checkWindowSize); }); $(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) [javascript] view plaincopyprint? $(document).ready(function() { var cloned = $('#id').clone(); // how to use <div id="id"></div> }); $(document).ready(function() { var cloned = $('#id').clone(); // how to use <div id="id"></div> }); 20. 使元素居中屏幕(Center an element on the screen) [javascript] view plaincopyprint? $(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(); }); $(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) [javascript] view plaincopyprint? $(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'); }); }); $(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) [javascript] view plaincopyprint? $(document).ready(function() { $("p").size(); }); $(document).ready(function() { $("p").size(); }); 23. 自定义Bullets(Use Your Own Bullets) [javascript] view plaincopyprint? $(document).ready(function() { $("ul").addClass("Replaced"); $("ul > li").prepend("‒ "); // how to use ul.Replaced { list-style : none; } }); $(document).ready(function() { $("ul").addClass("Replaced"); $("ul > li").prepend("‒ "); // how to use ul.Replaced { list-style : none; } }); 24. 引用google分发的jQuery(Let Google host jQuery for you) [javascript] view plaincopyprint? //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> //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) [javascript] view plaincopyprint? $(document).ready(function() { jQuery.fx.off = true; }); $(document).ready(function() { jQuery.fx.off = true; }); 26. 防止不兼容冲突(No conflict-mode) [javascript] view plaincopyprint? $(document).ready(function() { var $jq = jQuery.noConflict(); $jq('#id').show(); }); 点击打开链接

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