Home  >  Article  >  Web Front-end  >  10 Awesome jQuery Code Snippets_jquery

10 Awesome jQuery Code Snippets_jquery

WBOY
WBOYOriginal
2016-05-16 15:38:121010browse

图片预加载

(function($) { 
 var cache = []; 
 // Arguments are image paths relative to the current page. 
 $.preLoadImages = function() { 
  var args_len = arguments.length; 
  for (var i = args_len; i--;) { 
   var cacheImage = document.createElement('img'); 
   cacheImage.src = arguments[i]; 
   cache.push(cacheImage); 
  } 
 } 
 
jQuery.preLoadImages("image1.gif", "/path/to/image2.png"); 

在新窗口打开链接 (target=”blank”)

$('a[@rel$='external']').click(function(){ 
   this.target = "_blank"; 
}); 
 
/* 
  Usage: 
  <a href="http://www.catswhocode.com" rel="external">catswhocode.com</a> 
*/ 

当支持 JavaScript 时为 body 增加 class

/* 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 */ 
$('body').addClass('hasJS'); 

平滑滚动页面到某个锚点

$(document).ready(function() { 
  $("a.topLink").click(function() { 
    $("html, body").animate({ 
      scrollTop: $($(this).attr("href")).offset().top + "px" 
    }, { 
      duration: 500, 
      easing: "swing" 
    }); 
    return false; 
  }); 
}); 

鼠标滑动时的渐入和渐出

$(document).ready(function(){ 
  $(".thumbs img").fadeTo("slow", 0.6); // This sets the opacity of the thumbs to fade down to 60% when the page loads 
 
  $(".thumbs img").hover(function(){ 
    $(this).fadeTo("slow", 1.0); // This should set the opacity to 100% on hover 
  },function(){ 
    $(this).fadeTo("slow", 0.6); // This should set the opacity back to 60% on mouseout 
  }); 
}); 

制作等高的列

var max_height = 0; 
$("div.col").each(function(){ 
  if ($(this).height() > max_height) { max_height = $(this).height(); } 
}); 
$("div.col").height(max_height); 

在一些老的浏览器上启用 HTML5 的支持

(function(){ 
  if(!/*@cc_on!@*/0) 
    return; 
  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])} 
})() 
 
//然后在head中引入该js 
<!--[if lt IE 9]> 
<script src="http://html5shim.googlecode.com/svn/trunk/html5.js"></script> 
<![endif]--> 

测试浏览器是否支持某些 CSS3 属性

var supports = (function() { 
  var div = document.createElement('div'), 
   vendors = 'Khtml Ms O Moz Webkit'.split(' '), 
   len = vendors.length; 
 
  return function(prop) { 
   if ( prop in div.style ) return true; 
 
   prop = prop.replace(/^[a-z]/, function(val) { 
     return val.toUpperCase(); 
   }); 
 
   while(len--) { 
     if ( vendors[len] + prop in div.style ) { 
      // browser supports box-shadow. Do what you need. 
      // Or use a bang (!) to test if the browser doesn't. 
      return true; 
     } 
   } 
   return false; 
  }; 
})(); 
 
if ( supports('textShadow') ) { 
  document.documentElement.className += ' textShadow'; 

获取 URL 中传递的参数

$.urlParam = function(name){ 
  var results = new RegExp('[\\&#63;&]' + name + '=([^&#]*)').exec(window.location.href); 
  if (!results) { return 0; } 
  return results[1] || 0; 
} 

禁用表单的回车键提交

$("#form").keypress(function(e) { 
 if (e.which == 13) { 
  return false; 
 } 
}); 

之前的《直接拿来用的15个jQuery代码片段》文章就很不错,不知道大家收藏了吗?现在再来一份,一样很棒!

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn