• 【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

    $(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();  
    });  
    

      

    jquery 速查表:

    原贴地址:http://blog.csdn.net/sunboy_2050/article/details/8179162

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  • 原文地址:https://www.cnblogs.com/codefish/p/2778470.html
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