944
阿裏雲
技術社區[雲棲]
常見26個Jquery使用技巧(轉)
本文列出jquery一些應用小技巧,比如有禁止右鍵點擊、隱藏搜索文本框文 字、在新窗口中打開鏈接、檢測瀏覽器、預加載圖片、頁麵樣式切換、所有列等高、動態控製頁麵字體大小、獲得鼠標指針的X值Y值、驗證元素是否為空、替換元 素、延遲加載、驗證元素是否存在於Jquery集合中、使DIV可點擊、克隆對象、使元素居中、計算元素個數、使用Google主機上的Jquery類 庫、禁用Jquery效果、解決Jquery類庫與其他Javascript類庫衝突問題。
請看下文jquery技巧:
1、禁止右鍵點 擊
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$(document).ready( function (){
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$(document).bind( "contextmenu" , function (e){
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2、 隱藏搜索文本框文字
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$(document).ready( function () {
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$( "input.text1" ).val( "Enter your search text here" );
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textFill($( 'input.text1' ));
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function textFill(input){ //input focus text function
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var originalvalue = input.val();
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input.focus( function (){
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if ( $.trim(input.val()) == originalvalue ){ input.val( '' ); }
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input.blur( function (){
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if ( $.trim(input.val()) == '' ){ input.val(originalvalue); }
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3、 在 新窗口中打開鏈接
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$(document).ready( function () {
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//Example 1: Every link will open in a new window |
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//Example 2: Links with the rel="external" attribute will only open in a new window |
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$( 'a[@rel$=' external ']' ).click( function (){
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this .target = "_blank" ;
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4、檢測瀏覽器注: 在版本jQuery 1.4中,$.support 替換掉了$.browser 變量。
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$(document).ready( function () {
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// Target Firefox 2 and above |
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if ($.browser.mozilla && $.browser.version >= "1.8" ){
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if ( $.browser.safari ){
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if ( $.browser.chrome){
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if ( $.browser.camino){
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// Target IE6 and below |
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if ($.browser.msie && $.browser.version <= 6 ){
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// Target anything above IE6 |
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if ($.browser.msie && $.browser.version > 6){
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5、預加載圖片
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$(document).ready( function () {
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jQuery.preloadImages = function ()
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for ( var i = 0; i ").attr(" src", arguments[i]);
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$.preloadImages( "image1.jpg" );
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6、頁麵樣式切換
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$(document).ready( function () {
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$( "a.Styleswitcher" ).click( function () {
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//swicth the LINK REL attribute with the value in A REL attribute |
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$( 'link[rel=stylesheet]' ).attr( 'href' , $( this ).attr( 'rel' ));
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// place this in your header |
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<LINK href= "default.css" type=text/css rel=stylesheet>
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<A class=Styleswitcher href= "#" rel= default .css>Default Theme</A>
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<A href= "#" rel=red.css>Red Theme</A>
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<A href= "#" rel=blue.css>Blue Theme</A>
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7、 列高度相同如果使用了兩個CSS列,使用此種方式可以是兩列的高度相同。
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$(document).ready( function () {
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function equalHeight(group) {
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group.each( function () {
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thisHeight = $( this ).height();
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if (thisHeight > tallest) {
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group.height(tallest); |
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$(document).ready( function () {
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equalHeight($( ".left" ));
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equalHeight($( ".right" ));
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8、 動態控製 頁麵字體大小用戶可以改變頁麵字體大小
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$(document).ready( function () {
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// Reset the font size(back to default) |
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var originalFontSize = $( 'html' ).css( 'font-size' );
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$( ".resetFont" ).click( function (){
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$( 'html' ).css( 'font-size' , originalFontSize);
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// Increase the font size(bigger font0 |
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$( ".increaseFont" ).click( function (){
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var currentFontSize = $( 'html' ).css( 'font-size' );
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var currentFontSizeNum = parseFloat(currentFontSize, 10);
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var newFontSize = currentFontSizeNum*1.2;
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$( 'html' ).css( 'font-size' , newFontSize);
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// Decrease the font size(smaller font) |
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$( ".decreaseFont" ).click( function (){
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var currentFontSize = $( 'html' ).css( 'font-size' );
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var currentFontSizeNum = parseFloat(currentFontSize, 10);
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var newFontSize = currentFontSizeNum*0.8;
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$( 'html' ).css( 'font-size' , newFontSize);
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9、返回頁麵頂部功能
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$(document).ready( function () {
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$( 'a[href*=#]' ).click( function () {
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if (location.pathname.replace(/^/ //,'') == this.pathname.replace(/^///,'')
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&& location.hostname == this .hostname) {
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var $target = $( this .hash);
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$target = $target.length && $target |
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|| $( '[name=' + this .hash.slice(1) + ']' );
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var targetOffset = $target.offset().top;
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.animate({scrollTop: targetOffset}, 900); |
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// place this where you want to scroll to |
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<A href= "#top" >go to top</A>
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10、獲得鼠標指針 XY值
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$(document).ready( function () {
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$().mousemove( function (e){
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//display the x and y axis values inside the div with the id XY |
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$( '#XY' ).html( "X Axis : " + e.pageX + " | Y Axis " + e.pageY);
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11、 驗證元素是否為空
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$(document).ready( function () {
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12、替換元素
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$(document).ready( function () {
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<DIV>I have been replaced</DIV> |
13、jQuery延時加載功能
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$(document).ready( function () {
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window.setTimeout( function () {
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14、 移除單詞功能
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$(document).ready( function () {
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el.html(el.html().replace(/word/ig, "" ));
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16、驗證元素是否存在於Jquery對象集合中
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$(document).ready( function () {
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17、使整個DIV可點擊
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$(document).ready( function () {
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$( "div" ).click( function (){
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//get the url from href attribute and launch the url |
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window.location=$( this ).find( "a" ).attr( "href" ); return false ;
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<DIV><A href= "index.html" >home</A></DIV>
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18、ID與 Class之間轉換當改變Window大小時,在ID與Class之間切換
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$(document).ready( function () {
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function checkWindowSize() {
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if ( $(window).width() > 1200 ) {
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$( 'body' ).addClass( 'large' );
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$( 'body' ).removeClass( 'large' );
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$(window).resize(checkWindowSize); |
19、 克隆對象
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$(document).ready( function () {
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var cloned = $( '#id' ).clone();
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20、使元素居屏幕中間位置
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$(document).ready( function () {
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jQuery.fn.center = function () {
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this .css( "position" , "absolute" );
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this .css( "top" , ( $(window).height() - this .height() ) / 2+$(window).scrollTop() + "px" );
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this .css( "left" , ( $(window).width() - this .width() ) / 2+$(window).scrollLeft() + "px" );
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21、寫自己的選擇器
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$(document).ready( function () {
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$.extend($.expr[ ':' ], {
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moreThen1000px: function (a) {
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return $(a).width() > 1000;
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$( '.box:moreThen1000px' ).click( function () {
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// creating a simple js alert box |
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alert( 'The element that you have clicked is over 1000 pixels wide' );
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22、統計元素個數
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$(document).ready( function () {
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23、使用自己的 Bullets
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$(document).ready( function () {
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$( "ul" ).addClass( "Replaced" );
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$( "ul > li" ).prepend( "‒ " );
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ul.Replaced { list-style : none; } |
24、引用Google主機上的Jquery類庫Let Google host the jQuery script for you. This can be done in 2 ways.
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<SCRIPT type=text/javascript> |
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google.load( "jquery" , "1.2.6" );
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google.setOnLoadCallback( function () {
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// Example 2:(the best and fastest way) |
25、禁用Jquery(動畫)效果
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$(document).ready( function () {
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26、 與 其他Javascript類庫衝突解決方案
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$(document).ready( function () {
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var $jq = jQuery.noConflict();
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最後更新:2017-04-02 06:51:36