{"id":32371,"date":"2024-11-25T15:59:23","date_gmt":"2024-11-25T07:59:23","guid":{"rendered":"https:\/\/fwq.ai\/blog\/32371\/"},"modified":"2024-11-25T15:59:23","modified_gmt":"2024-11-25T07:59:23","slug":"%e6%8f%90%e9%ab%98%e6%82%a8%e6%8a%80%e8%83%bd%e7%9a%84-14-%e4%b8%aa-jquery-%e6%8a%80%e5%b7%a7%e3%80%81%e6%8f%90%e9%86%92%e5%92%8c%e6%9c%80%e4%bd%b3%e5%ae%9e%e8%b7%b5","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/32371\/","title":{"rendered":"\u63d0\u9ad8\u60a8\u6280\u80fd\u7684 14 \u4e2a jQuery \u6280\u5de7\u3001\u63d0\u9192\u548c\u6700\u4f73\u5b9e\u8df5"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/000\/465\/014\/169337191025938.jpg\" class=\"aligncenter\" title=\"\u63d0\u9ad8\u60a8\u6280\u80fd\u7684 14 \u4e2a jQuery \u6280\u5de7\u3001\u63d0\u9192\u548c\u6700\u4f73\u5b9e\u8df5\u63d2\u56fe\" alt=\"\u63d0\u9ad8\u60a8\u6280\u80fd\u7684 14 \u4e2a jQuery \u6280\u5de7\u3001\u63d0\u9192\u548c\u6700\u4f73\u5b9e\u8df5\u63d2\u56fe\" \/><\/p>\n<p> \u5982\u679c\u8bf4 jQuery \u6709\u4e00\u70b9<em>\u574f<\/em>\u7684\u8bdd\uff0c\u90a3\u5c31\u662f\u5b83\u7684\u5165\u95e8\u6c34\u5e73\u4f4e\u5f97\u60ca\u4eba\uff0c\u4ee5\u81f3\u4e8e\u5b83\u5f80\u5f80\u4f1a\u5438\u5f15\u90a3\u4e9b\u5bf9 JavaScript \u6ca1\u6709\u4e00\u70b9\u4e86\u89e3\u7684\u4eba\u3002\u73b0\u5728\uff0c\u4e00\u65b9\u9762\uff0c\u8fd9\u592a\u68d2\u4e86\u3002\u7136\u800c\uff0c\u53e6\u4e00\u65b9\u9762\uff0c\u5b83\u4e5f\u4f1a\u5bfc\u81f4\u4e00\u4e9b\uff0c\u5766\u7387\u5730\u8bf4\uff0c\u4ee4\u4eba\u538c\u6076\u7684\u7cdf\u7cd5\u4ee3\u7801\uff08\u5176\u4e2d\u4e00\u4e9b\u662f\u6211\u81ea\u5df1\u7f16\u5199\u7684\uff01\uff09\u3002<\/p>\n<p>\u4e0d\u8fc7\u6ca1\u5173\u7cfb\uff1b\u7cdf\u7cd5\u5f97\u53ef\u6015\u7684\u4ee3\u7801\u751a\u81f3\u4f1a\u8ba9\u4f60\u7684\u7956\u6bcd\u5598\u4e0d\u8fc7\u6c14\u6765\uff0c\u8fd9\u662f\u4e00\u79cd\u6210\u4eba\u4eea\u5f0f\u3002\u5173\u952e\u662f\u8981\u7ffb\u8fc7\u5c71\uff0c\u8fd9\u5c31\u662f\u6211\u4eec\u4eca\u5929\u6559\u7a0b\u4e2d\u8981\u8ba8\u8bba\u7684\u5185\u5bb9\u3002 <\/p>\n<\/p>\n<hr>\n<h2> 1\u3002 \u65b9\u6cd5\u8fd4\u56de jQuery \u5bf9\u8c61<\/h2>\n<p>\u8bf7\u52a1\u5fc5\u8bb0\u4f4f\uff0c\u5927\u591a\u6570\u65b9\u6cd5\u90fd\u4f1a\u8fd4\u56de jQuery \u5bf9\u8c61\u3002\u8fd9\u975e\u5e38\u6709\u7528\uff0c\u5e76\u4e14\u5141\u8bb8\u6211\u4eec\u7ecf\u5e38\u4f7f\u7528\u7684\u94fe\u63a5\u529f\u80fd\u3002 <\/p>\n<pre>\n$someDiv\n  .attr('class', 'someClass')\n  .hide()\n  .html('new stuff');\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p> \u77e5\u9053 jQuery \u5bf9\u8c61\u603b\u662f\u88ab\u8fd4\u56de\uff0c\u6211\u4eec\u6709\u65f6\u53ef\u4ee5\u4f7f\u7528\u5b83\u6765\u5220\u9664\u591a\u4f59\u7684\u4ee3\u7801\u3002\u4f8b\u5982\uff0c\u8003\u8651\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n<pre>\nvar someDiv = $('#someDiv');\nsomeDiv.hide();\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<blockquote><p>\n  \u6211\u4eec\u4e4b\u6240\u4ee5\u201c\u7f13\u5b58\u201d someDiv \u5143\u7d20\u7684\u4f4d\u7f6e\uff0c\u662f\u4e3a\u4e86\u5c06\u6211\u4eec\u5fc5\u987b\u904d\u5386\u8be5\u5143\u7d20\u7684 DOM \u7684\u6b21\u6570\u9650\u5236\u4e3a\u4e00\u6b21\u3002\n<\/p><\/blockquote>\n<p> \u4e0a\u9762\u7684\u4ee3\u7801\u5b8c\u5168\u6ca1\u95ee\u9898\uff1b\u4f46\u662f\uff0c\u60a8\u53ef\u4ee5\u8f7b\u677e\u5730\u5c06\u4e24\u6761\u7ebf\u5408\u5e76\u4e3a\u4e00\u6761\u7ebf\uff0c\u540c\u65f6\u83b7\u5f97\u76f8\u540c\u7684\u7ed3\u679c\u3002<\/p>\n<pre>\nvar someDiv = $('#someDiv').hide();\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p> \u8fd9\u6837\uff0c\u6211\u4eec\u4ecd\u7136\u9690\u85cf someDiv \u5143\u7d20\uff0c\u4f46\u6b63\u5982\u6211\u4eec\u6240\u77e5\uff0c\u8be5\u65b9\u6cd5\u4e5f\u8fd4\u56de jQuery \u5bf9\u8c61\u2014\u2014\u7136\u540e\u901a\u8fc7 someDiv \u53d8\u91cf\u5f15\u7528\u8be5\u5bf9\u8c61\u3002<\/p>\n<hr>\n<h2> 2\u3002 \u67e5\u627e\u9009\u62e9\u5668<\/h2>\n<p> \u53ea\u8981\u4f60\u7684\u9009\u62e9\u5668\u4e0d\u662f\u7cdf\u7cd5\u5f97\u79bb\u8c31\uff0cjQuery \u5c31\u4f1a\u5c3d\u53ef\u80fd\u5730\u4f18\u5316\u5b83\u4eec\uff0c\u800c\u4e14\u4f60\u901a\u5e38\u4e0d\u9700\u8981\u592a\u62c5\u5fc3\u5b83\u4eec\u3002\u4e0d\u8fc7\uff0c\u8bdd\u867d\u5982\u6b64\uff0c\u60a8\u53ef\u4ee5\u8fdb\u884c\u4e00\u4e9b\u6539\u8fdb\uff0c\u4ece\u800c\u7a0d\u5fae\u63d0\u9ad8\u811a\u672c\u7684\u6027\u80fd\u3002<\/p>\n<p> \u4e00\u79cd\u8fd9\u6837\u7684\u89e3\u51b3\u65b9\u6848\u662f\u5728\u53ef\u80fd\u7684\u60c5\u51b5\u4e0b\u4f7f\u7528 find() \u65b9\u6cd5\u3002\u5982\u679c\u6ca1\u6709\u5fc5\u8981\u7684\u8bdd\uff0c\u5173\u952e\u662f\u4e0d\u8981\u5f3a\u8feb jQuery \u4f7f\u7528\u5b83\u7684 Sizzle \u5f15\u64ce\u3002\u5f53\u7136\uff0c\u6709\u65f6\u8fd9\u662f\u4e0d\u53ef\u80fd\u7684\u2014\u2014\u4f46\u8fd9\u6ca1\u5173\u7cfb\uff1b\u4f46\u662f\uff0c\u5982\u679c\u60a8\u4e0d\u9700\u8981\u989d\u5916\u7684\u5f00\u9500\uff0c\u5c31\u4e0d\u8981\u5bfb\u627e\u5b83\u3002 <\/p>\n<pre>\n\/\/ Fine in modern browsers, though Sizzle does begin \"running\"\n$('#someDiv p.someClass').hide();\n\n\/\/ Better for all browsers, and Sizzle never inits.\n$('#someDiv').find('p.someClass').hide();\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<blockquote>\n<p> \u6700\u65b0\u7684\u73b0\u4ee3\u6d4f\u89c8\u5668\u652f\u6301 QuerySelectorAll\uff0c\u5b83\u5141\u8bb8\u60a8\u4f20\u9012\u7c7b\u4f3c CSS \u7684\u9009\u62e9\u5668\uff0c\u800c\u4e0d\u9700\u8981 jQuery\u3002 jQuery \u672c\u8eab\u4e5f\u4f1a\u68c0\u67e5\u6b64\u51fd\u6570\u3002<\/p>\n<\/blockquote>\n<p>\u4f46\u662f\uff0c\u8f83\u65e7\u7684\u6d4f\u89c8\u5668\uff08\u5373 IE6\/IE7\uff09\u4e0d\u63d0\u4f9b\u652f\u6301\uff0c\u8fd9\u662f\u53ef\u4ee5\u7406\u89e3\u7684\u3002\u8fd9\u610f\u5473\u7740\u8fd9\u4e9b\u66f4\u590d\u6742\u7684\u9009\u62e9\u5668\u4f1a\u89e6\u53d1 jQuery \u7684\u5b8c\u6574 Sizzle \u5f15\u64ce\uff0c\u8be5\u5f15\u64ce\u867d\u7136\u5f88\u51fa\u8272\uff0c\u4f46\u786e\u5b9e\u4f1a\u5e26\u6765\u66f4\u591a\u7684\u5f00\u9500\u3002 <\/p>\n<blockquote>\n<p>Sizzle \u662f\u4e00\u5927\u5806\u6211\u53ef\u80fd\u6c38\u8fdc\u65e0\u6cd5\u7406\u89e3\u7684\u7cbe\u5f69\u4ee3\u7801\u3002\u7136\u800c\uff0c\u5728\u4e00\u53e5\u8bdd\u4e2d\uff0c\u5b83\u9996\u5148\u5c06\u60a8\u7684\u9009\u62e9\u5668\u53d8\u6210\u4e00\u4e2a\u7531\u9009\u62e9\u5668\u7684\u6bcf\u4e2a\u7ec4\u4ef6\u7ec4\u6210\u7684\u201c\u6570\u7ec4\u201d\u3002 <\/p>\n<\/blockquote>\n<pre>\n\/\/ Rough idea of how it works\n ['#someDiv, 'p'];\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u7136\u540e\uff0c\u4ece\u53f3\u5230\u5de6\uff0c\u5f00\u59cb\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u7834\u8bd1\u6bcf\u4e2a\u9879\u76ee\u3002\u8fd9\u4e5f\u610f\u5473\u7740\u9009\u62e9\u5668\u7684\u6700\u53f3\u4fa7\u90e8\u5206\u5e94\u5c3d\u53ef\u80fd\u5177\u4f53 &#8211; \u4f8b\u5982\uff0cid \u6216\u6807\u8bb0\u540d\u79f0\u3002 <\/p>\n<p>\u5e95\u7ebf\uff0c\u5982\u679c\u53ef\u80fd\u7684\u8bdd\uff1a<\/p>\n<ul>\n<li> \u4fdd\u6301\u9009\u62e9\u5668\u7b80\u5355 <\/li>\n<li> \u5229\u7528 find() \u65b9\u6cd5\u3002\u8fd9\u6837\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u7ee7\u7eed\u4f7f\u7528\u6d4f\u89c8\u5668\u7684\u539f\u751f\u529f\u80fd\uff0c\u800c\u4e0d\u662f\u4f7f\u7528 Sizzle\u3002 <\/li>\n<li> \u4f7f\u7528 Sizzle \u65f6\uff0c\u5c3d\u53ef\u80fd\u4f18\u5316\u9009\u62e9\u5668\u7684\u6700\u53f3\u4fa7\u90e8\u5206\u3002 <\/li>\n<\/ul>\n<h3> \u4e0a\u4e0b\u6587\uff1f <\/h3>\n<p>\u8fd8\u53ef\u4ee5\u5411\u9009\u62e9\u5668\u6dfb\u52a0\u4e0a\u4e0b\u6587\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre>\n$('.someElements', '#someContainer').hide();\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u6b64\u4ee3\u7801\u6307\u793a jQuery \u5728 jQuery \u4e2d\u4f7f\u7528 someElements \u7c7b\uff08\u5b83\u4eec\u662f someContainer \u7684\u5b50\u7ea7\uff09\u5305\u88c5\u6240\u6709\u5143\u7d20\u7684\u96c6\u5408\u3002\u4f7f\u7528\u4e0a\u4e0b\u6587\u662f\u9650\u5236 DOM \u904d\u5386\u7684\u4e00\u79cd\u6709\u7528\u65b9\u6cd5\uff0c\u4f46\u5728\u5e55\u540e\uff0cjQuery \u4f7f\u7528 find \u65b9\u6cd5\u6765\u4ee3\u66ff\u3002 <\/p>\n<pre>\n$('#someContainer')\n  .find('.someElements')\n  .hide();\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<h4>\u8bc1\u660e<\/h4>\n<pre>\n\/\/ HANDLE: $(expr, context)\n\/\/ (which is just equivalent to: $(context).find(expr)\n} else {\n   return jQuery( context ).find( selector );\n}\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<hr>\n<h2> 3\u3002 \u4e0d\u8981\u6ee5\u7528$(this) <\/h2>\n<p> \u5728\u4e0d\u4e86\u89e3\u5404\u79cd DOM \u5c5e\u6027\u548c\u529f\u80fd\u7684\u60c5\u51b5\u4e0b\uff0c\u5f88\u5bb9\u6613\u4e0d\u5fc5\u8981\u5730\u6ee5\u7528 jQuery \u5bf9\u8c61\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>\n$('#someAnchor').click(function() {\n\t\/\/ Bleh\n\talert( $(this).attr('id') );\n});\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u5982\u679c\u6211\u4eec\u5bf9 jQuery \u5bf9\u8c61\u7684\u552f\u4e00\u9700\u8981\u662f\u8bbf\u95ee\u951a\u6807\u8bb0\u7684 id \u5c5e\u6027\uff0c\u90a3\u4e48\u8fd9\u662f\u6d6a\u8d39\u7684\u3002\u6700\u597d\u575a\u6301\u4f7f\u7528\u201c\u539f\u59cb\u201dJavaScript\u3002 <\/p>\n<pre>\n$('#someAnchor').click(function() {\n\talert( this.id );\n});\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<blockquote>\n<p>\u8bf7\u6ce8\u610f\uff0c\u5e94\u8be5\u59cb\u7ec8\u901a\u8fc7 jQuery \u8bbf\u95ee\u4e09\u4e2a\u5c5e\u6027\uff1a\u201csrc\u201d\u3001\u201chref\u201d\u548c\u201cstyle\u201d\u3002\u8fd9\u4e9b\u5c5e\u6027\u9700\u8981\u5728\u65e7\u7248\u672c\u7684 IE \u4e2d\u4f7f\u7528 getAttribute\u3002 <\/p>\n<\/blockquote>\n<h4>\u8bc1\u660e<\/h4>\n<pre>\n\/\/ jQuery Source\nvar rspecialurl = \/href|src|style\/;\n\/\/ ... \nvar special = rspecialurl.test( name );\n\/\/ ...\nvar attr = !jQuery.support.hrefNormalized &amp;amp;&amp;amp; notxml &amp;amp;&amp;amp; special ?\n\t\/\/ Some attributes require a special call on IE\n\telem.getAttribute( name, 2 ) :\n\telem.getAttribute( name );\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<h3> \u591a\u4e2a jQuery \u5bf9\u8c61 <\/h3>\n<p> \u66f4\u7cdf\u7cd5\u7684\u662f\u91cd\u590d\u67e5\u8be2 DOM \u548c\u521b\u5efa\u591a\u4e2a jQuery \u5bf9\u8c61\u7684\u8fc7\u7a0b\u3002<\/p>\n<pre>\n\t$('#elem').hide();\n\t$('#elem').html('bla');\n\t$('#elem').otherStuff();\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p> \u5e0c\u671b\u60a8\u5df2\u7ecf\u610f\u8bc6\u5230\u8fd9\u6bb5\u4ee3\u7801\u7684\u6548\u7387\u6709\u591a\u4f4e\u3002\u5982\u679c\u6ca1\u6709\uff0c\u4e5f\u6ca1\u5173\u7cfb\uff1b\u6211\u4eec\u90fd\u5728\u5b66\u4e60\u3002\u7b54\u6848\u662f\u8981\u4e48\u5b9e\u73b0\u94fe\u63a5\uff0c\u8981\u4e48\u201c\u7f13\u5b58\u201d #elem \u7684\u4f4d\u7f6e\u3002<\/p>\n<pre>\n\t\/\/ This works better\n\t$('#elem')\n\t  .hide()\n\t  .html('bla')\n\t  .otherStuff();\n\n\t\/\/ Or this, if you prefer for some reason.\n\tvar elem = $('#elem');\n\telem.hide();\n\telem.html('bla');\n\telem.otherStuff();\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<hr>\n<h2> <span>4\u3002 <\/span>jQuery\u7684\u7b80\u5199Ready\u65b9\u6cd5<\/h2>\n<p> \u4f7f\u7528 jQuery \u76d1\u542c\u6587\u6863\u4f55\u65f6\u51c6\u5907\u597d\u8fdb\u884c\u64cd\u4f5c\u662f\u975e\u5e38\u7b80\u5355\u7684\u3002 <\/p>\n<pre>\n$(document).ready(function() {\n\t\/\/ let's get up in heeya\n});\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u4e0d\u8fc7\uff0c\u60a8\u5f88\u53ef\u80fd\u9047\u5230\u8fc7\u4e0d\u540c\u7684\u3001\u66f4\u4ee4\u4eba\u56f0\u60d1\u7684\u5305\u88c5\u51fd\u6570\u3002 <\/p>\n<pre>\n$(function() {\n\t\/\/ let's get up in heeya\n});\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p> \u5c3d\u7ba1\u540e\u8005\u7684\u53ef\u8bfb\u6027\u7a0d\u5dee\uff0c\u4f46\u4e0a\u9762\u7684\u4e24\u4e2a\u7247\u6bb5\u662f\u76f8\u540c\u7684\u3002\u4e0d\u76f8\u4fe1\u6211\uff1f\u53ea\u9700\u68c0\u67e5 jQuery \u6e90\u4ee3\u7801\u5373\u53ef\u3002<\/p>\n<pre>\n\/\/ HANDLE: $(function)\n\/\/ Shortcut for document ready\nif ( jQuery.isFunction( selector ) ) {\n\treturn rootjQuery.ready( selector );\n}\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>rootjQuery \u53ea\u662f\u5bf9\u6839 jQuery(document) \u7684\u5f15\u7528\u3002\u5f53\u60a8\u5c06\u9009\u62e9\u5668\u4f20\u9012\u7ed9 jQuery \u51fd\u6570\u65f6\uff0c\u5b83\u5c06\u786e\u5b9a\u60a8\u4f20\u9012\u7684\u9009\u62e9\u5668\u7c7b\u578b\uff1a\u5b57\u7b26\u4e32\u3001\u6807\u8bb0\u3001id\u3001\u51fd\u6570\u7b49\u3002\u5982\u679c\u4f20\u9012\u4e86\u51fd\u6570\uff0cjQuery \u5c06\u8c03\u7528\u5176 ready() \u65b9\u6cd5\uff0c\u5e76\u5c06\u60a8\u7684\u533f\u540d\u51fd\u6570\u4f5c\u4e3a\u9009\u62e9\u5668\u4f20\u9012\u3002 <\/p>\n<hr>\n<h2> 5\u3002 \u4fdd\u8bc1\u4ee3\u7801\u5b89\u5168<\/h2>\n<p> \u5982\u679c\u5f00\u53d1\u7528\u4e8e\u5206\u53d1\u7684\u4ee3\u7801\uff0c\u8865\u507f\u4efb\u4f55\u53ef\u80fd\u7684\u540d\u79f0\u51b2\u7a81\u59cb\u7ec8\u5f88\u91cd\u8981\u3002\u5982\u679c\u5728\u60a8\u7684\u811a\u672c\u4e4b\u540e\u5bfc\u5165\u7684\u67d0\u4e9b\u811a\u672c\u4e5f\u5177\u6709 $ \u51fd\u6570\uff0c\u4f1a\u53d1\u751f\u4ec0\u4e48\u60c5\u51b5\uff1f\u574f\u4e1c\u897f\uff01<\/p>\n<p>\u7b54\u6848\u662f\u8981\u4e48\u8c03\u7528 jQuery \u7684 noConflict()\uff0c\u8981\u4e48\u5c06\u4ee3\u7801\u5b58\u50a8\u5728\u81ea\u8c03\u7528\u533f\u540d\u51fd\u6570\u4e2d\uff0c\u7136\u540e\u5c06 jQuery \u4f20\u9012\u7ed9\u5b83\u3002 <\/p>\n<h4> \u65b9\u6cd5\u4e00\uff1a\u65e0\u51b2\u7a81 <\/h4>\n<pre>\nvar j = jQuery.noConflict();\n\/\/ Now, instead of $, we use j. \nj('#someDiv').hide();\n\n\/\/ The line below will reference some other library's $ function.\n$('someDiv').style.display = 'none';\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u8bf7\u5c0f\u5fc3\u4f7f\u7528\u6b64\u65b9\u6cd5\uff0c\u5e76\u5728\u5206\u53d1\u4ee3\u7801\u65f6\u5c3d\u91cf\u4e0d\u8981\u4f7f\u7528\u5b83\u3002\u8fd9\u771f\u7684\u4f1a\u8ba9\u811a\u672c\u7684\u7528\u6237\u611f\u5230\u56f0\u60d1\uff01 \ud83d\ude42 <\/p>\n<h4>\u65b9\u6cd5\u4e8c\uff1a\u4f20\u9012jQuery<\/h4>\n<pre>\n(function($) {\n\t\/\/ Within this function, $ will always refer to jQuery\n})(jQuery);\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u5e95\u90e8\u7684\u6700\u540e\u4e00\u4e2a\u62ec\u53f7\u81ea\u52a8\u8c03\u7528\u8be5\u51fd\u6570 &#8211; function(){}()\u3002\u7136\u800c\uff0c\u5f53\u6211\u4eec\u8c03\u7528\u8be5\u51fd\u6570\u65f6\uff0c\u6211\u4eec\u8fd8\u4f20\u9012\u4e86 jQuery\uff0c\u7136\u540e\u7528 $ \u8868\u793a\u3002 <\/p>\n<h4> \u65b9\u6cd53\uff1a\u901a\u8fc7Ready\u65b9\u6cd5\u4f20\u9012$ <\/h4>\n<pre>\njQuery(document).ready(function($) {\n \/\/ $ refers to jQuery\n});\n\n\/\/ $ is either undefined, or refers to some other library's function.\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<hr>\n<h2> 6\u3002 \u8981\u806a\u660e<\/h2>\n<p> \u8bf7\u8bb0\u4f4f &#8211; jQuery \u53ea\u662f JavaScript\u3002\u4e0d\u8981\u5047\u8bbe\u5b83\u6709\u80fd\u529b\u5f25\u8865\u4f60\u7684\u9519\u8bef\u7f16\u7801\u3002 \ud83d\ude42<\/p>\n<p> \u8fd9\u610f\u5473\u7740\uff0c\u6b63\u5982\u6211\u4eec\u5fc5\u987b\u4f18\u5316 JavaScript for \u8bed\u53e5\u7b49\u5185\u5bb9\u4e00\u6837\uff0cjQuery \u7684 each \u65b9\u6cd5\u4e5f\u662f\u5982\u6b64\u3002\u6211\u4eec\u4e3a\u4ec0\u4e48\u4e0d\u5462\uff1f\u5b83\u53ea\u662f\u4e00\u4e2a\u8f85\u52a9\u65b9\u6cd5\uff0c\u7136\u540e\u5728\u5e55\u540e\u521b\u5efa for \u8bed\u53e5\u3002<\/p>\n<pre>\n\/\/ jQuery's each method source\n\teach: function( object, callback, args ) {\n\t\tvar name, i = 0,\n\t\t\tlength = object.length,\n\t\t\tisObj = length === undefined || jQuery.isFunction(object);\n\n\t\tif ( args ) {\n\t\t\tif ( isObj ) {\n\t\t\t\tfor ( name in object ) {\n\t\t\t\t\tif ( callback.apply( object[ name ], args ) === false ) {\n\t\t\t\t\t\tbreak;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tfor ( ; i \n&lt;h4&gt; \u592a\u7cdf\u7cd5\u4e86 &lt;\/h4&gt;\n&lt;pre class=\"brush:javascript;toolbal:false;\"&gt;\nsomeDivs.each(function() {\n\t$('#anotherDiv')[0].innerHTML += $(this).text();\n});\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<ol>\n<li>\u6bcf\u6b21\u8fed\u4ee3\u641c\u7d22 anotherDiv <\/li>\n<li> \u83b7\u53d6innerHTML \u5c5e\u6027<strong>\u4e24\u6b21<\/strong> <\/li>\n<li>\u521b\u5efa\u4e00\u4e2a\u65b0\u7684 jQuery \u5bf9\u8c61\uff0c\u5168\u90e8\u7528\u4e8e\u8bbf\u95ee\u5143\u7d20\u7684\u6587\u672c\u3002 <\/li>\n<\/ol>\n<h4>\u66f4\u597d<\/h4>\n<pre>\nvar someDivs = $('#container').find('.someDivs'),\n      contents = [];\n\nsomeDivs.each(function() {\n\tcontents.push( this.innerHTML );\n});\n$('#anotherDiv').html( contents.join('') );\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u8fd9\u6837\uff0c\u5728 each (for) \u65b9\u6cd5\u4e2d\uff0c\u6211\u4eec\u6267\u884c\u7684\u552f\u4e00\u4efb\u52a1\u5c31\u662f\u5411\u6570\u7ec4\u6dfb\u52a0\u4e00\u4e2a\u65b0\u952e&#8230;\u800c\u4e0d\u662f\u67e5\u8be2 DOM\uff0c\u4e24\u6b21\u83b7\u53d6\u5143\u7d20\u7684 innerHTML \u5c5e\u6027\uff0c\u7b49\u7b49<\/p>\n<p><strong>\u8fd9\u7bc7\u6280\u5de7\u603b\u4f53\u4e0a\u66f4\u591a\u5730\u57fa\u4e8e JavaScript\uff0c\u800c\u4e0d\u662f\u7279\u5b9a\u4e8e jQuery\u3002 <\/strong> \u91cd\u70b9\u662f\u8981\u8bb0\u4f4f jQuery \u5e76\u4e0d\u80fd\u5f25\u8865\u7cdf\u7cd5\u7684\u7f16\u7801\u3002 <\/p>\n<h3> \u6587\u6863\u7247\u6bb5 <\/h3>\n<p> \u5f53\u6211\u4eec\u8fd9\u6837\u505a\u65f6\uff0c\u9488\u5bf9\u6b64\u7c7b\u60c5\u51b5\u7684\u53e6\u4e00\u79cd\u9009\u62e9\u662f\u4f7f\u7528\u6587\u6863\u7247\u6bb5\u3002 <\/p>\n<pre>\nvar someUls = $('#container').find('.someUls'),\n\tfrag = document.createDocumentFragment(),\n\tli;\n\t\nsomeUls.each(function() {\n\tli = document.createElement('li');\n\tli.appendChild( document.createTextNode(this.innerHTML) );\n\tfrag.appendChild(li);\n});\n\n$('#anotherUl')[0].appendChild( frag );\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u8fd9\u91cc\u7684\u5173\u952e\u662f\uff0c\u6709\u591a\u79cd\u65b9\u6cd5\u53ef\u4ee5\u5b8c\u6210\u8fd9\u6837\u7684\u7b80\u5355\u4efb\u52a1\uff0c\u5e76\u4e14\u6bcf\u79cd\u65b9\u6cd5\u5728\u6d4f\u89c8\u5668\u4e4b\u95f4\u90fd\u6709\u81ea\u5df1\u7684\u6027\u80fd\u4f18\u52bf\u3002\u60a8\u8d8a\u575a\u6301\u4f7f\u7528 jQuery \u5e76\u5b66\u4e60 JavaScript\uff0c\u60a8\u53ef\u80fd\u8fd8\u4f1a\u53d1\u73b0\u60a8\u66f4\u9891\u7e41\u5730\u5f15\u7528 JavaScript \u7684\u672c\u673a\u5c5e\u6027\u548c\u65b9\u6cd5\u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u90a3\u5c31\u592a\u68d2\u4e86\uff01 <\/p>\n<p>jQuery \u63d0\u4f9b\u4e86\u4ee4\u4eba\u60ca\u53f9\u7684\u62bd\u8c61\u7ea7\u522b\uff0c\u60a8\u5e94\u8be5\u5229\u7528\u5b83\uff0c\u4f46\u8fd9\u5e76\u4e0d\u610f\u5473\u7740\u60a8\u88ab\u8feb\u4f7f\u7528\u5b83\u7684\u65b9\u6cd5\u3002\u4f8b\u5982\uff0c\u5728\u4e0a\u9762\u7684\u7247\u6bb5\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528 jQuery \u7684 each \u65b9\u6cd5\u3002\u5982\u679c\u60a8\u66f4\u559c\u6b22\u4f7f\u7528 for \u6216 while \u8bed\u53e5\uff0c\u90a3\u4e5f\u6ca1\u5173\u7cfb\uff01<\/p>\n<blockquote>\n<p>\u5c3d\u7ba1\u5982\u6b64\uff0c\u8bf7\u8bb0\u4f4f jQuery \u56e2\u961f\u5df2\u7ecf\u5bf9\u8be5\u5e93\u8fdb\u884c\u4e86\u5927\u91cf\u4f18\u5316\u3002\u5173\u4e8e jQuery \u7684 each() \u4e0e\u672c\u673a for \u8bed\u53e5\u7684\u4e89\u8bba\u662f\u611a\u8822\u800c\u7410\u788e\u7684\u3002\u5982\u679c\u60a8\u5728\u9879\u76ee\u4e2d\u4f7f\u7528 jQuery\uff0c\u8bf7\u4f7f\u7528\u5b83\u4eec\u7684\u5e2e\u52a9\u5668\u65b9\u6cd5\u6765\u8282\u7701\u65f6\u95f4\u3002\u8fd9\u5c31\u662f\u4ed6\u4eec\u5b58\u5728\u7684\u76ee\u7684\uff01 \ud83d\ude42<\/p>\n<\/blockquote>\n<hr>\n<h2> <span>7\u3002 <\/span>AJAX \u65b9\u6cd5<\/h2>\n<p> \u5982\u679c\u60a8\u73b0\u5728\u624d\u5f00\u59cb\u6df1\u5165\u7814\u7a76 jQuery\uff0c\u5b83\u4e3a\u6211\u4eec\u63d0\u4f9b\u7684\u5404\u79cd AJAX \u65b9\u6cd5\u53ef\u80fd\u4f1a\u8ba9\u4eba\u611f\u5230\u6709\u70b9\u754f\u60e7\uff1b\u5c3d\u7ba1\u4ed6\u4eec\u4e0d\u9700\u8981\u3002\u4e8b\u5b9e\u4e0a\uff0c\u5b83\u4eec\u4e2d\u7684\u5927\u591a\u6570\u53ea\u662f\u7b80\u5355\u7684\u8f85\u52a9\u65b9\u6cd5\uff0c\u76f4\u63a5\u8def\u7531\u5230 $.ajax\u3002<\/p>\n<ul>\n<li> <strong>\u83b7\u53d6<\/strong> <\/li>\n<li> <strong>getJSON <\/strong> <\/li>\n<li> <strong>\u5e16\u5b50 <\/strong> <\/li>\n<li> <strong>ajax <\/strong> <\/li>\n<\/ul>\n<p> \u4f5c\u4e3a\u793a\u4f8b\uff0c\u8ba9\u6211\u4eec\u56de\u987e\u4e00\u4e0b getJSON\uff0c\u5b83\u5141\u8bb8\u6211\u4eec\u83b7\u53d6 JSON\u3002<\/p>\n<pre>\n$.getJSON('path\/to\/json', function(results) {\n\t\/\/ callback\n\t\/\/ results contains the returned data object\n});\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236    \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p> \u5728\u5e55\u540e\uff0c\u8be5\u65b9\u6cd5\u9996\u5148\u8c03\u7528 $.get\u3002<\/p>\n<pre>\ngetJSON: function( url, data, callback ) {\n\treturn jQuery.get(url, data, callback, \"json\");\n}\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>$.get \u7136\u540e\u7f16\u8bd1\u4f20\u9012\u7684\u6570\u636e\uff0c\u5e76\u518d\u6b21\u8c03\u7528\u201cmaster\u201d\uff08\u67d0\u79cd\u610f\u4e49\u4e0a\u7684\uff09$.ajax \u65b9\u6cd5\u3002<\/p>\n<pre>\nget: function( url, data, callback, type ) {\n\t\/\/ shift arguments if data argument was omited\n\tif ( jQuery.isFunction( data ) ) {\n\t\ttype = type || callback;\n\t\tcallback = data;\n\t\tdata = null;\n\t}\n\n\treturn jQuery.ajax({\n\t\ttype: \"GET\",\n\t\turl: url,\n\t\tdata: data,\n\t\tsuccess: callback,\n\t\tdataType: type\n\t});\n}\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u6700\u540e\uff0c$.ajax \u6267\u884c\u4e86\u5927\u91cf\u5de5\u4f5c\uff0c\u4f7f\u6211\u4eec\u80fd\u591f\u5728\u6240\u6709\u6d4f\u89c8\u5668\u4e0a\u6210\u529f\u53d1\u51fa\u5f02\u6b65\u8bf7\u6c42\uff01 <\/p>\n<blockquote>\n<p><strong>\u8fd9\u610f\u5473\u7740<\/strong>\u60a8\u4e5f\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528 $.ajax \u65b9\u6cd5\u6765\u5904\u7406\u60a8\u7684\u6240\u6709 AJAX \u8bf7\u6c42\u3002\u5176\u4ed6\u65b9\u6cd5\u53ea\u662f\u8f85\u52a9\u65b9\u6cd5\uff0c\u65e0\u8bba\u5982\u4f55\u6700\u7ec8\u90fd\u4f1a\u6267\u884c\u6b64\u64cd\u4f5c\u3002\u6240\u4ee5\uff0c\u5982\u679c\u4f60\u613f\u610f\u7684\u8bdd\uff0c\u5c31\u53ef\u4ee5\u53bb\u6389\u4e2d\u95f4\u4eba\u3002\u65e0\u8bba\u5982\u4f55\uff0c\u8fd9\u90fd\u4e0d\u662f\u4e00\u4e2a\u91cd\u8981\u7684\u95ee\u9898\u3002 <\/p>\n<\/blockquote>\n<h4> \u53ea\u662f\u82b1\u82b1\u516c\u5b50 <\/h4>\n<pre>\n$.getJSON('path\/to\/json', function(results) {\n\t\/\/ callback\n\t\/\/ results contains the returned data object\n});\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236    \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<h4> \u5fae\u89c2\u4e0a\u66f4\u9ad8\u6548 <\/h4>\n<pre>\n$.ajax({\n\ttype: 'GET',\n\turl : 'path\/to\/json',\n\tdata : yourData,\n\tdataType : 'json',\n\tsuccess : function( results ) {\n\t\tconsole.log('success');\n\t})\n});\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<hr>\n<h2> 8\u3002 \u8bbf\u95ee\u672c\u673a\u5c5e\u6027\u548c\u65b9\u6cd5<\/h2>\n<p> \u73b0\u5728\u60a8\u5df2\u7ecf\u5b66\u4e60\u4e86\u4e00\u4e9b JavaScript\uff0c\u5e76\u4e14\u5df2\u7ecf\u4e86\u89e3\uff0c\u4f8b\u5982\uff0c\u5728\u951a\u6807\u8bb0\u4e0a\uff0c\u60a8\u53ef\u4ee5\u76f4\u63a5\u8bbf\u95ee\u5c5e\u6027\u503c\uff1a<\/p>\n<pre>\nvar anchor = document.getElementById('someAnchor');\n \/\/anchor.id\n\/\/ anchor.href\n\/\/ anchor.title\n\/\/ .etc\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u552f\u4e00\u7684\u95ee\u9898\u662f\uff0c\u5f53\u60a8\u4f7f\u7528 jQuery \u5f15\u7528 DOM \u5143\u7d20\u65f6\uff0c\u8fd9\u4f3c\u4e4e\u4e0d\u8d77\u4f5c\u7528\uff0c\u5bf9\u5417\uff1f\u5f53\u7136\u4e0d\u662f\u3002 <\/p>\n<h4> \u4e0d\u8d77\u4f5c\u7528 <\/h4>\n<pre>\n\t\/\/ Fails\n\tvar id = $('#someAnchor').id;\n<\/pre>\n<p>  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\u5f53\u7136\uff0c\u5bf9\u4e8e\u6211\u4eec\u7684\u7edd\u5927\u591a\u6570\u9879\u76ee\uff0c\u6211\u4eec\u4e0d\u80fd<em>\u4ec5\u4ec5<\/em>\u4f9d\u8d56 JavaScript \u6765\u5b8c\u6210\u8bf8\u5982\u9a8c\u8bc1\u6216 AJAX \u8bf7\u6c42\u4e4b\u7c7b\u7684\u4e8b\u60c5\u3002\u5f53 JavaScript \u5173\u95ed\u65f6\u4f1a\u53d1\u751f\u4ec0\u4e48\uff1f\u6b63\u662f\u51fa\u4e8e\u8fd9\u4e2a\u539f\u56e0\uff0c\u4e00\u79cd\u5e38\u89c1\u7684\u6280\u672f\u662f\u68c0\u6d4b AJAX \u8bf7\u6c42\u662f\u5426\u662f\u4f7f\u7528\u60a8\u9009\u62e9\u7684\u670d\u52a1\u5668\u7aef\u8bed\u8a00\u53d1\u51fa\u7684\u3002<\/p>\n<p>jQuery \u901a\u8fc7\u5728 $.ajax \u65b9\u6cd5\u4e2d\u8bbe\u7f6e\u6807\u5934\uff0c\u4f7f\u8fd9\u53d8\u5f97\u5f02\u5e38\u7b80\u5355\u3002 <\/p>\n<pre>\n\/\/ Set header so the called script knows that it's an XMLHttpRequest\n\/\/ Only send the header if it's not a remote XHR\nif ( !remote ) {\n\txhr.setRequestHeader(\"X-Requested-With\", \"XMLHttpRequest\");\n}\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u8bbe\u7f6e\u6b64\u6807\u5934\u540e\uff0c\u6211\u4eec\u73b0\u5728\u53ef\u4ee5\u4f7f\u7528 PHP\uff08\u6216\u4efb\u4f55\u5176\u4ed6\u8bed\u8a00\uff09\u68c0\u67e5\u6b64\u6807\u5934\uff0c\u5e76\u8fdb\u884c\u76f8\u5e94\u64cd\u4f5c\u3002\u4e3a\u6b64\uff0c\u6211\u4eec\u68c0\u67e5 $_SERVER[&#8216;HTTP_X_REQUESTED_WITH&#8217;] \u7684\u503c\u3002<\/p>\n<h3>\u5305\u88c5\u5668<\/h3>\n<pre>\nfunction isXhr() {\n  return $_SERVER['HTTP_X_REQUESTED_WITH'] === 'XMLHttpRequest';\n}\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<hr>\n<h2> 10\u3002 jQuery \u548c $ <\/h2>\n<p> \u6709\u6ca1\u6709\u60f3\u8fc7\u4e3a\u4ec0\u4e48\/\u5982\u4f55\u53ef\u4ee5\u4e92\u6362\u4f7f\u7528 jQuery \u548c $ \uff1f\u8981\u627e\u5230\u7b54\u6848\uff0c\u8bf7\u67e5\u770b jQuery \u6e90\u4ee3\u7801\uff0c\u7136\u540e\u6eda\u52a8\u5230\u6700\u5e95\u90e8\u3002\u5728\u90a3\u91cc\uff0c\u60a8\u4f1a\u770b\u5230\uff1a<\/p>\n<pre>\nwindow.jQuery = window.$ = jQuery;\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u5f53\u7136\uff0c\u6574\u4e2a jQuery \u811a\u672c\u90fd\u5305\u542b\u5728\u4e00\u4e2a\u81ea\u6267\u884c\u51fd\u6570\u4e2d\uff0c\u8fd9\u5141\u8bb8\u811a\u672c\u5c3d\u53ef\u80fd\u5730\u9650\u5236\u5168\u5c40\u53d8\u91cf\u7684\u6570\u91cf\u3002\u4f46\u8fd9\u4e5f\u610f\u5473\u7740 jQuery \u5bf9\u8c61\u5728\u5305\u88c5\u533f\u540d\u51fd\u6570\u4e4b\u5916\u4e0d\u53ef\u7528\u3002 <\/p>\n<p>\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0cjQuery \u88ab\u66b4\u9732\u7ed9\u5168\u5c40 window \u5bf9\u8c61\uff0c\u5e76\u4e14\u5728\u6b64\u8fc7\u7a0b\u4e2d\uff0c\u8fd8\u4f1a\u521b\u5efa\u4e00\u4e2a\u522b\u540d &#8211; $ -\u3002 <\/p>\n<hr>\n<h2> 11\u3002 \u6709\u6761\u4ef6\u5730\u52a0\u8f7d jQuery <\/h2>\n<p> HTML5 Boilerplate \u63d0\u4f9b\u4e86\u4e00\u4e2a\u6f02\u4eae\u7684\u5355\u884c\u4ee3\u7801\uff0c\u5982\u679c\u7531\u4e8e\u67d0\u79cd\u5947\u602a\u7684\u539f\u56e0\u60a8\u9009\u62e9\u7684 CDN \u51fa\u73b0\u6545\u969c\uff0c\u5b83\u5c06\u52a0\u8f7d jQuery \u7684\u672c\u5730\u526f\u672c\u3002 <\/p>\n<pre>\n&lt;!-- Grab Google CDN jQuery. fall back to local if necessary --&gt;\n&lt;script src=\"http:\/\/ajax.googleapis.com\/ajax\/libs\/jquery\/1.4.2\/jquery.min.js\"&gt;&lt;\/script&gt;&lt;script&gt;!window.jQuery &amp;&amp; document.write('&lt;script src=\"js\/jquery-1.4.2.min.js\"&gt;&lt;\/script&gt;')&lt;\/script&gt;<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u201c\u8868\u8ff0\u201d\u4e0a\u9762\u7684\u4ee3\u7801\uff1a\u5982\u679c window.jQuery \u672a\u5b9a\u4e49\uff0c\u5219\u4ece CDN \u4e0b\u8f7d\u811a\u672c\u65f6\u4e00\u5b9a\u51fa\u73b0\u95ee\u9898\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u8bf7\u7ee7\u7eed\u5230 &amp;&amp; \u8fd0\u7b97\u7b26\u7684\u53f3\u4fa7\uff0c\u5e76\u63d2\u5165\u94fe\u63a5\u5230\u672c\u5730\u200b\u200b\u7248\u672c jQuery \u7684\u811a\u672c\u3002<\/p>\n<hr>\n<h2> 12\u3002 jQuery \u8fc7\u6ee4\u5668<\/h2>\n<\/p>\n<p><span>\u9ad8\u7ea7\u4f1a\u5458\uff1a\u4e0b\u8f7d\u6b64\u89c6\u9891\uff08\u5fc5\u987b\u767b\u5f55\uff09<\/span><\/p>\n<p> <span>\u8ba2\u9605\u6211\u4eec\u7684 YouTube \u9875\u9762\u4ee5\u89c2\u770b\u6240\u6709\u89c6\u9891\u6559\u7a0b\uff01<\/span> <\/p>\n<pre>\n&lt;script&gt;\n\t$('p:first').data('info', 'value'); \/\/ populates $'s data object to have something to work with\n\t\n\t$.extend(\n\t\tjQuery.expr[\":\"], {\n\t\t\tblock: function(elem) {\n\t\t\t\treturn $(elem).css(\"display\") === \"block\";\n\t\t\t},\n\t\t\t\n\t\t\thasData : function(elem) {\t\t\t\t\n\t\t\t\treturn !$.isEmptyObject( $(elem).data() );\n\t\t\t}\n\t\t}\n\t);\n\t\n\t$(\"p:hasData\").text(\"has data\"); \/\/ grabs paras that have data attached\n\t$(\"p:block\").text(\"are block level\"); \/\/ grabs only paragraphs that have a display of \"block\"\n&lt;\/script&gt;<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<blockquote>\n<p>\u6ce8\u610f\uff1ajQuery.expr[&#8216;:&#8217;] \u53ea\u662f jQuery.expr.filters \u7684\u522b\u540d\u3002 <\/p>\n<\/blockquote>\n<hr>\n<h2> 13\u3002 \u5355\u4e00\u60ac\u505c\u529f\u80fd<\/h2>\n<p>\u4ece jQuery 1.4 \u5f00\u59cb\uff0c\u6211\u4eec\u73b0\u5728\u53ea\u80fd\u5c06\u5355\u4e2a\u51fd\u6570\u4f20\u9012\u7ed9 hover \u65b9\u6cd5\u3002\u4ee5\u524d\uff0c<em>in<\/em> \u548c <em>out<\/em> \u65b9\u6cd5\u90fd\u662f\u5fc5\u9700\u7684\u3002 <\/p>\n<h4>\u4e4b\u524d<\/h4>\n<pre>\n$('#someElement').hover(function() {\n  \/\/ mouseover\n}, function() {\n \/\/ mouseout\n});\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<h4>\u73b0\u5728<\/h4>\n<pre>\n$('#someElement').hover(function() {\n  \/\/ the toggle() method can be used here, if applicable\n});\n<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u8bf7\u6ce8\u610f\uff0c\u8fd9\u4e0d\u662f\u65e7\u534f\u8bae\u4e0e\u65b0\u534f\u8bae\u7684\u6bd4\u8f83\u3002\u5f88\u591a\u65f6\u5019\uff0c\u60a8\u4ecd\u7136\u9700\u8981\u5c06\u4e24\u4e2a\u51fd\u6570\u4f20\u9012\u7ed9 hover\uff0c\u8fd9\u662f\u5b8c\u5168\u53ef\u4ee5\u63a5\u53d7\u7684\u3002\u4f46\u662f\uff0c\u5982\u679c\u60a8\u53ea\u9700\u8981\u5207\u6362\u67d0\u4e9b\u5143\u7d20\uff08\u6216\u7c7b\u4f3c\u7684\u5143\u7d20\uff09\uff0c\u5219\u4f20\u9012\u5355\u4e2a\u533f\u540d\u51fd\u6570\u5c06\u8282\u7701\u4e00\u4e9b\u5b57\u7b26\u5de6\u53f3\uff01 <\/p>\n<hr>\n<h2> <span>14\u3002 <\/span>\u4f20\u9012\u5c5e\u6027\u5bf9\u8c61<\/h2>\n<p> \u4ece jQuery 1.4 \u5f00\u59cb\uff0c\u6211\u4eec\u73b0\u5728\u53ef\u4ee5\u4f20\u9012\u4e00\u4e2a\u5bf9\u8c61\u4f5c\u4e3a jQuery \u51fd\u6570\u7684\u7b2c\u4e8c\u4e2a\u53c2\u6570\u3002\u5f53\u6211\u4eec\u9700\u8981\u5411 DOM 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