{"id":26,"date":"2009-06-18T10:38:33","date_gmt":"2009-06-18T02:38:33","guid":{"rendered":"http:\/\/www.magki.com\/blog\/?p=26"},"modified":"2009-06-18T10:42:46","modified_gmt":"2009-06-18T02:42:46","slug":"jquery-study-notes","status":"publish","type":"post","link":"http:\/\/www.ijony.com\/blog\/2009\/06\/jquery-study-notes.html","title":{"rendered":"jQuery \u5b66\u4e60\u7b14\u8bb0"},"content":{"rendered":"

\u672c\u6587\u7684\u6240\u6709\u5185\u5bb9\u5747\u51fa\u81ea http:\/\/bbs.jquery.org.cn\/read.php?tid-3744.html \u4e00\u6587\u4e2d\u6240\u63d0\u4f9b\u7684\u9644\u4ef6\u6587\u6863\uff0c\u4e3b\u8981\u662f\u51fa\u4e8e\u4ee5\u540e\u67e5\u9605\u65b9\u4fbf\u5728\u6b64\u5907\u4efd\u4e00\u4efd\u3002<\/p>\n

1\u3001\u5173\u4e8e\u9875\u9762\u5143\u7d20\u7684\u5f15\u7528<\/strong><\/p>\n

\u901a\u8fc7jquery\u7684$()\u5f15\u7528\u5143\u7d20\u5305\u62ec\u901a\u8fc7id\u3001class\u3001\u5143\u7d20\u540d\u4ee5\u53ca\u5143\u7d20\u7684\u5c42\u7ea7\u5173\u7cfb\u53cadom\u6216\u8005xpath\u6761\u4ef6\u7b49\u65b9\u6cd5\uff0c\u4e14\u8fd4\u56de\u7684\u5bf9\u8c61\u4e3ajquery\u5bf9\u8c61\uff08\u96c6\u5408\u5bf9\u8c61\uff09\uff0c\u4e0d\u80fd\u76f4\u63a5\u8c03\u7528dom\u5b9a\u4e49\u7684\u65b9\u6cd5\u3002<\/p>\n

2\u3001jQuery\u5bf9\u8c61\u4e0edom\u5bf9\u8c61\u7684\u8f6c\u6362<\/strong><\/p>\n

\u53ea\u6709jquery\u5bf9\u8c61\u624d\u80fd\u4f7f\u7528jquery\u5b9a\u4e49\u7684\u65b9\u6cd5\u3002\u6ce8\u610fdom\u5bf9\u8c61\u548cjquery\u5bf9\u8c61\u662f\u6709\u533a\u522b\u7684\uff0c\u8c03\u7528\u65b9\u6cd5\u65f6\u8981\u6ce8\u610f\u64cd\u4f5c\u7684\u662fdom\u5bf9\u8c61\u8fd8\u662fjquery\u5bf9\u8c61\u3002
\n\u666e\u901a\u7684dom\u5bf9\u8c61\u4e00\u822c\u53ef\u4ee5\u901a\u8fc7$()\u8f6c\u6362\u6210jquery\u5bf9\u8c61\u3002
\n\u5982\uff1a$(document.getElementById(“msg”))\u5219\u4e3ajquery\u5bf9\u8c61\uff0c\u53ef\u4ee5\u4f7f\u7528jquery\u7684\u65b9\u6cd5\u3002
\n\u7531\u4e8ejquery\u5bf9\u8c61\u672c\u8eab\u662f\u4e00\u4e2a\u96c6\u5408\u3002\u6240\u4ee5\u5982\u679cjquery\u5bf9\u8c61\u8981\u8f6c\u6362\u4e3adom\u5bf9\u8c61\u5219\u5fc5\u987b\u53d6\u51fa\u5176\u4e2d\u7684\u67d0\u4e00\u9879\uff0c\u4e00\u822c\u53ef\u901a\u8fc7\u7d22\u5f15\u53d6\u51fa\u3002
\n\u5982\uff1a$(“#msg”)[0]\uff0c$(“div”).eq(1)[0]\uff0c$(“div”).get()[1]\uff0c$(“td”)[5]\u8fd9\u4e9b\u90fd\u662fdom\u5bf9\u8c61\uff0c\u53ef\u4ee5\u4f7f\u7528dom\u4e2d\u7684\u65b9\u6cd5\uff0c\u4f46\u4e0d\u80fd\u518d\u4f7f\u7528Jquery\u7684\u65b9\u6cd5\u3002
\n\u4ee5\u4e0b\u51e0\u79cd\u5199\u6cd5\u90fd\u662f\u6b63\u786e\u7684\uff1a<\/p>\n

$(“#msg”).html();
\n$(“#msg”)[0].innerHTML;
\n$(“#msg”).eq(0)[0].innerHTML;
\n$(“#msg”).get(0).innerHTML;<\/p><\/blockquote>\n

<\/p>\n

3\u3001\u5982\u4f55\u83b7\u53d6jQuery\u96c6\u5408\u7684\u67d0\u4e00\u9879<\/strong><\/p>\n

\u5bf9\u4e8e\u83b7\u53d6\u7684\u5143\u7d20\u96c6\u5408\uff0c\u83b7\u53d6\u5176\u4e2d\u7684\u67d0\u4e00\u9879\uff08\u901a\u8fc7\u7d22\u5f15\u6307\u5b9a\uff09\u53ef\u4ee5\u4f7f\u7528eq\u6216get(n)\u65b9\u6cd5\u6216\u8005\u7d22\u5f15\u53f7\u83b7\u53d6\uff0c\u8981\u6ce8\u610f\uff0ceq\u8fd4\u56de\u7684\u662fjquery\u5bf9\u8c61\uff0c\u800cget(n)\u548c\u7d22\u5f15\u8fd4\u56de\u7684\u662fdom\u5143\u7d20\u5bf9\u8c61\u3002\u5bf9\u4e8ejquery\u5bf9\u8c61\u53ea\u80fd\u4f7f\u7528jquery\u7684\u65b9\u6cd5\uff0c\u800cdom\u5bf9\u8c61\u53ea\u80fd\u4f7f\u7528dom\u7684\u65b9\u6cd5\uff0c\u5982\u8981\u83b7\u53d6\u7b2c\u4e09\u4e2a<div>\u5143\u7d20\u7684\u5185\u5bb9\u3002\u6709\u5982\u4e0b\u4e24\u79cd\u65b9\u6cd5\uff1a<\/p>\n

$(“div”).eq(2).html();\u00a0 \u00a0 \/\/\u8c03\u7528jquery\u5bf9\u8c61\u7684\u65b9\u6cd5
\n$(“div”).get(2).innerHTML; \/\/\u8c03\u7528dom\u7684\u65b9\u6cd5\u5c5e\u6027<\/p><\/blockquote>\n

4\u3001\u540c\u4e00\u51fd\u6570\u5b9e\u73b0set\u548cget<\/strong><\/p>\n

Jquery\u4e2d\u7684\u5f88\u591a\u65b9\u6cd5\u90fd\u662f\u5982\u6b64\uff0c\u4e3b\u8981\u5305\u62ec\u5982\u4e0b\u51e0\u4e2a\uff1a<\/p>\n

$(“#msg”).html();\u00a0 \u00a0 \/\/\u8fd4\u56deid\u4e3amsg\u7684\u5143\u7d20\u8282\u70b9\u7684html\u5185\u5bb9\u3002
\n$(“#msg”).html(“<b>new content<\/b>”);
\n\/\/\u5c06\u201c<b>new content<\/b>\u201d \u4f5c\u4e3ahtml\u4e32\u5199\u5165id\u4e3amsg\u7684\u5143\u7d20\u8282\u70b9\u5185\u5bb9\u4e2d,\u9875\u9762\u663e\u793a\u7c97\u4f53\u7684new content<\/p>\n

$(“#msg”).text();\u00a0 \u00a0 \/\/\u8fd4\u56deid\u4e3amsg\u7684\u5143\u7d20\u8282\u70b9\u7684\u6587\u672c\u5185\u5bb9\u3002
\n$(“#msg”).text(“<b>new content<\/b>”);
\n\/\/\u5c06\u201c<b>new content<\/b>\u201d \u4f5c\u4e3a\u666e\u901a\u6587\u672c\u4e32\u5199\u5165id\u4e3amsg\u7684\u5143\u7d20\u8282\u70b9\u5185\u5bb9\u4e2d,\u9875\u9762\u663e\u793a<b>new content<\/b><\/p>\n

$(“#msg”).height();\u00a0 \u00a0 \/\/\u8fd4\u56deid\u4e3amsg\u7684\u5143\u7d20\u7684\u9ad8\u5ea6
\n$(“#msg”).height(“300”); \/\/\u5c06id\u4e3amsg\u7684\u5143\u7d20\u7684\u9ad8\u5ea6\u8bbe\u4e3a300
\n$(“#msg”).width();\u00a0 \u00a0 \/\/\u8fd4\u56deid\u4e3amsg\u7684\u5143\u7d20\u7684\u5bbd\u5ea6
\n$(“#msg”).width(“300”); \/\/\u5c06id\u4e3amsg\u7684\u5143\u7d20\u7684\u5bbd\u5ea6\u8bbe\u4e3a300<\/p>\n

$(“input”).val(“); \/\/\u8fd4\u56de\u8868\u5355\u8f93\u5165\u6846\u7684value\u503c
\n$(“input”).val(“test”); \/\/\u5c06\u8868\u5355\u8f93\u5165\u6846\u7684value\u503c\u8bbe\u4e3atest<\/p>\n

$(“#msg”).click(); \/\/\u89e6\u53d1id\u4e3amsg\u7684\u5143\u7d20\u7684\u5355\u51fb\u4e8b\u4ef6
\n$(“#msg”).click(fn); \/\/\u4e3aid\u4e3amsg\u7684\u5143\u7d20\u5355\u51fb\u4e8b\u4ef6\u6dfb\u52a0\u51fd\u6570<\/p><\/blockquote>\n

\u540c\u6837blur,focus,select,submit\u4e8b\u4ef6\u90fd\u53ef\u4ee5\u6709\u7740\u4e24\u79cd\u8c03\u7528\u65b9\u6cd5<\/p>\n

5\u3001\u96c6\u5408\u5904\u7406\u529f\u80fd<\/strong><\/p>\n

\u5bf9\u4e8ejquery\u8fd4\u56de\u7684\u96c6\u5408\u5185\u5bb9\u65e0\u9700\u6211\u4eec\u81ea\u5df1\u5faa\u73af\u904d\u5386\u5e76\u5bf9\u6bcf\u4e2a\u5bf9\u8c61\u5206\u522b\u505a\u5904\u7406\uff0cjquery\u5df2\u7ecf\u4e3a\u6211\u4eec\u63d0\u4f9b\u7684\u5f88\u65b9\u4fbf\u7684\u65b9\u6cd5\u8fdb\u884c\u96c6\u5408\u7684\u5904\u7406\u3002
\n\u5305\u62ec\u4e24\u79cd\u5f62\u5f0f\uff1a<\/p>\n

$(“p”).each(function(i){this.style.color=[‘#f00′,’#0f0′,’#00f’][ i ]})
\n\/\/\u4e3a\u7d22\u5f15\u5206\u522b\u4e3a0\uff0c1\uff0c2\u7684p\u5143\u7d20\u5206\u522b\u8bbe\u5b9a\u4e0d\u540c\u7684\u5b57\u4f53\u989c\u8272\u3002<\/p>\n

$(“tr”).each(function(i){this.style.backgroundColor=[‘#ccc’,’#fff’][i%2]})
\n\/\/\u5b9e\u73b0\u8868\u683c\u7684\u9694\u884c\u6362\u8272\u6548\u679c<\/p>\n

$(“p”).click(function(){alert($(this).html())})
\n\/\/\u4e3a\u6bcf\u4e2ap\u5143\u7d20\u589e\u52a0\u4e86click\u4e8b\u4ef6\uff0c\u5355\u51fb\u67d0\u4e2ap\u5143\u7d20\u5219\u5f39\u51fa\u5176\u5185\u5bb9<\/p><\/blockquote>\n

6\u3001\u6269\u5c55\u6211\u4eec\u9700\u8981\u7684\u529f\u80fd<\/strong><\/p>\n

$.extend({
\nmin: function(a, b){return a < b?a:b; },
\nmax: function(a, b){return a > b?a:b; }
\n}); \/\/\u4e3ajquery\u6269\u5c55\u4e86min,max\u4e24\u4e2a\u65b9\u6cd5<\/p><\/blockquote>\n

\u4f7f\u7528\u6269\u5c55\u7684\u65b9\u6cd5\uff08\u901a\u8fc7\u201c$.\u65b9\u6cd5\u540d\u201d\u8c03\u7528\uff09\uff1a<\/p>\n

alert(“a=10,b=20,max=”+$.max(10,20)+”,min=”+$.min(10,20));<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"

\u672c\u6587\u7684\u6240\u6709\u5185\u5bb9\u5747\u51fa\u81ea http:\/\/bbs.jquery.org.cn\/read.php?tid-3744.h […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[2],"tags":[14],"_links":{"self":[{"href":"http:\/\/www.ijony.com\/blog\/wp-json\/wp\/v2\/posts\/26"}],"collection":[{"href":"http:\/\/www.ijony.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.ijony.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.ijony.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.ijony.com\/blog\/wp-json\/wp\/v2\/comments?post=26"}],"version-history":[{"count":0,"href":"http:\/\/www.ijony.com\/blog\/wp-json\/wp\/v2\/posts\/26\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.ijony.com\/blog\/wp-json\/wp\/v2\/media?parent=26"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.ijony.com\/blog\/wp-json\/wp\/v2\/categories?post=26"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.ijony.com\/blog\/wp-json\/wp\/v2\/tags?post=26"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}