10 个很棒的 jQuery 代码片段（转）
8*/3. [代码]当支持 JavaScript 时为 body 增加 class 跳至[1][2][3][4][5][6][7][8][9][10][全屏预览]view sourceprint?1/* 该代码只有1行，但是最简单的用来检测浏览器是否支持 JavaScript 的方法，如果支持 JavaScript 就在 body 元素增加一个 hasJS 的 class */2$('body').addClass('hasJS');4. [代码]平滑滚动页面到某个锚点 跳至[1][2][3][4][5][6][7][8][9][10][全屏预览]view sourceprint?01$(document).ready(function() {02??? $("a.topLink").click(function() {03??????? $("html, body").animate({04??????????? scrollTop: $($(this).attr("href")).offset().top + "px"05??????? }, {06??????????? duration: 500,07??????????? easing: "swing"08??????? });09??????? return false;10??? });11});5. [代码]鼠标滑动时的渐入和渐出 跳至[1][2][3][4][5][6][7][8][9][10][全屏预览]view sourceprint?1$(document).ready(function(){2??? $(".thumbs img").fadeTo("slow", 0.6); // This sets the opacity of the thumbs to fade down to 60% when the page loads3?4??? $(".thumbs img").hover(function(){5??????? $(this).fadeTo("slow", 1.0); // This should set the opacity to 100% on hover6??? },function(){7??????? $(this).fadeTo("slow", 0.6); // This should set the opacity back to 60% on mouseout8??? });9});6. [代码]制作等高的列 跳至[1][2][3][4][5][6][7][8][9][10][全屏预览]view sourceprint?1var max_height = 0;2$("div.col").each(function(){3??? if ($(this).height() > max_height) { max_height = $(this).height(); }4});5$("div.col").height(max_height);7. [代码]在一些老的浏览器上启用 HTML5 的支持 跳至[1][2][3][4][5][6][7][8][9][10][全屏预览]view sourceprint?01(function(){02??? if(!/*@cc_on!@*/0)03??????? return;04??? var e = "abbr,article,aside,audio,bb,canvas,datagrid,datalist,details,dialog,eventsource,figure,footer,header,hgroup,mark,menu,meter,nav,output,progress,section,time,video".split(','),i=e.length;while(i--){document.createElement(e[i])}05})()06?07//然后在head中引入该js08<!--[if lt IE 9]>09<script src="http://html5shim.googlecode.com/svn/trunk/html5.js"></script>10<![endif]-->8. [代码]测试浏览器是否支持某些 CSS3 属性 跳至[1][2][3][4][5][6][7][8][9][10][全屏预览]view sourceprint?01var supports = (function() {02?? var div = document.createElement('div'),03????? vendors = 'Khtml Ms O Moz Webkit'.split(' '),04????? len = vendors.length;05?06?? return function(prop) {07????? if ( prop in div.style ) return true;08?09????? prop = prop.replace(/^[a-z]/, function(val) {10???????? return val.toUpperCase();11????? });12?13????? while(len--) {14???????? if ( vendors[len] + prop in div.style ) {15??????????? // browser supports box-shadow. Do what you need.16??????????? // Or use a bang (!) to test if the browser doesn't.17??????????? return true;18???????? }19????? }20????? return false;21?? };22})();23?24if ( supports('textShadow') ) {25?? document.documentElement.className += ' textShadow';9. [代码]获取 URL 中传递的参数 跳至[1][2][3][4][5][6][7][8][9][10][全屏预览]view sourceprint?1$.urlParam = function(name){2??? var results = new RegExp('[\\?&]' + name + '=([^&#]*)').exec(window.location.href);3??? if (!results) { return 0; }4??? return results[1] || 0;5}10. [代码]禁用表单的回车键提交 跳至[1][2][3][4][5][6][7][8][9][10][全屏预览]view sourceprint?1$("#form").keypress(function(e) {2? if (e.which == 13) {3??? return false;4? }5});
