{"id":308,"date":"2020-02-16T20:39:56","date_gmt":"2020-02-16T12:39:56","guid":{"rendered":"https:\/\/www.notown.club\/?p=308"},"modified":"2020-04-05T22:15:50","modified_gmt":"2020-04-05T14:15:50","slug":"ajax%e6%8a%80%e6%9c%af","status":"publish","type":"post","link":"https:\/\/www.notown.top\/?p=308","title":{"rendered":"Ajax\u6280\u672f"},"content":{"rendered":"\n

\u4e00\u3001Ajax\u662f\u4ec0\u4e48<\/strong><\/p>\n\n\n\n

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\u4e8c\u3001XMLHttpRequest\u5bf9\u8c61<\/strong><\/p>\n\n\n\n

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var xhr;
if (window.ActiveXObject)\/\/code for IE6 IE5
{
    xhr= new ActiveXObject(\"Microsoft.XMLHTTP\");
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{
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\u2461\u53d1\u9001XMLHttpRequest\u8bf7\u6c42<\/strong>
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       header:\u5b9a\u4e49HTTP\u5934\u7684\u540d\u79f0
       value:\u5b9a\u4e49HTTP\u5934\u7684\u503c 
\u2462\u5b8c\u6210XMLHttpRequest\u54cd\u5e94<\/strong>
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Ajax\u53ea\u5b9a\u4e49\u4e86\u4e00\u4e2a\u4e8b\u4ef6\u5c31\u662f\u201conreadystatechange\u201d\u4e8b\u4ef6\u3002\u5728\u5904\u7406\u4e8b\u4ef6\u65f6\uff0cXMLHttpRequest\u5bf9\u8c61\u5b9a\u4e49\u4e86\u4e09\u4e2a\u5c5e\u6027
\u00b7 readyState\u5c5e\u6027<\/strong>\uff1a\u8868\u793aXMLHttpRequest\u5bf9\u8c61\u7684\u72b6\u6001\uff0c\u72b6\u6001\u503c\u57280~4\u4e4b\u95f4
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     3\uff1a\u8868\u793a\u8bf7\u6c42\u670d\u52a1\u5668\u5904\u7406\u4e2d
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