jQuery开发技巧 25大实用的jQuery技巧和解决方案 1 去除页面的右键菜单 $ docum

文件名称: jQuery开发技巧

所属分类: Javascript

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上传时间: 2015-04-04

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详细说明： 25大实用的jQuery技巧和解决方案 1 去除页面的右键菜单 $ document ready function { $ document bind "contextmenu" function e { return false; } ; } ; 2 搜索输入框文字的消失当鼠标获得焦点失去焦点的时候 input输入框文字处理： $ 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 新窗口打开页面 $ 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 open link< a> 4 判断浏览器类型注意： jQuery 1 4中$ support 来代替以前的$ browser $ 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 $ document ready function { jQuery preloadImages function { for var i 0; i" attr "src" arguments[i] ; } } how to use $ preloadImages "image1 jpg" ; } ; < arguments length;> 6 轻松切换css样式 $ 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 the links Default Theme< a> Red Theme< a> Blue Theme< a> } ; 7 高度相等的列如果您使用两个CSS列以此来作为他们完全一样的高度 $ 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 简单字体变大缩小 $ 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 返回头部滑动动画 $ "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> the link go to top< a> 10 获取鼠标位置 $ 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 ; } ; 11 判断一个元素是否为空 if $ "#id" html { do something } 12 替换元素 $ "#id" replaceWith "
I have been replaced< div> " ; 13 jquery timer 返回函数 $ document ready function { window setTimeout function { do something } 1000 ; } ; 14 jquery也玩替换 $ document ready function { var el $ "#id" ; el html el html replace word ig "" ; } ; 15 判断元素是否存在 $ document ready function { if $ "#id" length { do something } } ; 16 让div也可以click $ "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
home< a>< div> 17 使用jquery来判断浏览器大小添加不同的class $ document ready function { function checkWindowSize { if $ window width > 1200 { $ "body" addClass "large" ; } else { $ "body" removeClass "large" ; } } $ window resize checkWindowSize ; } ; 18 几个字符就clone var cloned $ "#id" clone 19 设置div在屏幕中央 $ 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 ; } ; 20 创建自己的选择器 $ 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" ; } ; } ; 21 计算元素的数目 $ document ready function { $ "p" size ; } ; 22 设置自己的li样式 $ document ready function { $ "ul" addClass "Replaced" ; $ "ul > li" prepend " " ; how to use ul Replaced { list style : none; } } ; 23 使用google的主机来加载jquery库