来源 |  https://www.fly63.com

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（Disappearing search field text）

$(document).ready(function() {$("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）

$(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）

$(document).ready(function() {// Target Firefox 2 and aboveif ($.browser.mozilla && $.browser.version >= "1.8" ){  // do something}
// Target Safariif( $.browser.safari ){  // do something}
// Target Chromeif( $.browser.chrome){  // do something}
// Target Caminoif( $.browser.camino){  // do something}
// Target Operaif( $.browser.opera){  // do something}
// Target IE6 and belowif ($.browser.msie && $.browser.version <= 6 ){  // do something}
// Target anything above IE6if ($.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="#" 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）

$(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）

$(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）

$(document).ready(function() {$(‘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）

$(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）

$(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）

$(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）

$(document).ready(function() {   $("p").size();});

23、自定义Bullets（Use Your Own Bullets）

$(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）

//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();});

本文完~

学习更多技能

请点击下方公众号