{"id":11913,"date":"2023-11-28T22:37:29","date_gmt":"2023-11-28T14:37:29","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=11913"},"modified":"2023-11-30T18:23:23","modified_gmt":"2023-11-30T10:23:23","slug":"javascript-zhong-shen-me-shiajax-ru-he-shi-xian","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/javascript-zhong-shen-me-shiajax-ru-he-shi-xian\/","title":{"rendered":"JavaScript \u4e2d\u4ec0\u4e48\u662f AJAX\uff1f\u5982\u4f55\u5b9e\u73b0\uff1f"},"content":{"rendered":"

AJAX\uff08Asynchronous JavaScript and XML\uff09\u662f\u4e00\u79cd\u5229\u7528 XMLHttpRequest \u5bf9\u8c61\u4e0e\u670d\u52a1\u5668\u8fdb\u884c\u5f02\u6b65\u6570\u636e\u4ea4\u6362\u7684\u6280\u672f\u3002\u5b83\u5141\u8bb8\u5728\u4e0d\u91cd\u65b0\u52a0\u8f7d\u6574\u4e2a\u9875\u9762\u7684\u60c5\u51b5\u4e0b\uff0c\u901a\u8fc7\u540e\u53f0\u53d1\u9001 HTTP \u8bf7\u6c42\u5e76\u83b7\u53d6\u6570\u636e\uff0c\u7136\u540e\u4f7f\u7528 JavaScript \u66f4\u65b0\u9875\u9762\u5185\u5bb9\u3002<\/p>\n

<\/span><\/a>\u5b9e\u73b0 AJAX \u7684\u6b65\u9aa4\uff1a<\/h3>\n
    \n
  1. \n

    \u521b\u5efa XMLHttpRequest \u5bf9\u8c61\uff1a<\/strong> \u4f7f\u7528 new XMLHttpRequest()<\/code> \u521b\u5efa\u4e00\u4e2a XMLHttpRequest \u5bf9\u8c61\u3002<\/p>\n<\/li>\n

  2. \n

    \u8bbe\u7f6e\u8bf7\u6c42\uff1a<\/strong> \u4f7f\u7528 open()<\/code> \u65b9\u6cd5\u8bbe\u7f6e\u8bf7\u6c42\u7684\u7c7b\u578b\uff08GET\u3001POST \u7b49\uff09\u3001URL \u548c\u662f\u5426\u4e3a\u5f02\u6b65\u8bf7\u6c42\u3002<\/p>\n<\/li>\n

  3. \n

    \u5904\u7406\u54cd\u5e94\uff1a<\/strong> \u4f7f\u7528 onreadystatechange<\/code> \u4e8b\u4ef6\u76d1\u542c\u5668\u6765\u76d1\u63a7\u8bf7\u6c42\u7684\u72b6\u6001\u53d8\u5316\uff0c\u5e76\u5904\u7406\u670d\u52a1\u5668\u8fd4\u56de\u7684\u6570\u636e\u3002<\/p>\n<\/li>\n

  4. \n

    \u53d1\u9001\u8bf7\u6c42\uff1a<\/strong> \u4f7f\u7528 send()<\/code> \u65b9\u6cd5\u53d1\u9001\u8bf7\u6c42\u5230\u670d\u52a1\u5668\u3002<\/p>\n<\/li>\n<\/ol>\n

    <\/span><\/a>\u7b80\u5355\u793a\u4f8b\uff1a<\/h3>\n
    \/\/ \u521b\u5efa XMLHttpRequest \u5bf9\u8c61\nlet xhr = new XMLHttpRequest();\n\n\/\/ \u76d1\u542c\u8bf7\u6c42\u72b6\u6001\u53d8\u5316\nxhr.onreadystatechange = function() {\n  if (xhr.readyState === XMLHttpRequest.DONE) {\n    if (xhr.status === 200) {\n      \/\/ \u8bf7\u6c42\u6210\u529f\uff0c\u5904\u7406\u670d\u52a1\u5668\u8fd4\u56de\u7684\u6570\u636e\n      console.log(xhr.responseText);\n    } else {\n      \/\/ \u8bf7\u6c42\u5931\u8d25\uff0c\u5904\u7406\u9519\u8bef\n      console.error('Request failed:', xhr.status);\n    }\n  }\n};\n\n\/\/ \u8bbe\u7f6e\u8bf7\u6c42\nxhr.open('GET', 'https:\/\/api.example.com\/data', true);\n\n\/\/ \u53d1\u9001\u8bf7\u6c42\nxhr.send();\n<\/code><\/pre>\n
    \u901a\u8fc7 AJAX \u6280\u672f\uff0c\u53ef\u4ee5\u5b9e\u73b0\u5728\u4e0d\u5237\u65b0\u6574\u4e2a\u9875\u9762\u7684\u60c5\u51b5\u4e0b\u4e0e\u670d\u52a1\u5668\u8fdb\u884c\u6570\u636e\u4ea4\u4e92\u3002\u8fd9\u79cd\u6280\u672f\u7684\u4f7f\u7528\u4f7f\u5f97 Web \u5e94\u7528\u7a0b\u5e8f\u66f4\u52a0\u6d41\u7545\u548c\u9ad8\u6548\uff0c\u63d0\u9ad8\u4e86\u7528\u6237\u4f53\u9a8c\u3002\u73b0\u4ee3\u7684\u524d\u7aef\u6846\u67b6\u548c\u5e93\u4e5f\u63d0\u4f9b\u4e86\u66f4\u65b9\u4fbf\u7684\u5c01\u88c5\u548c\u4f7f\u7528 AJAX \u7684\u65b9\u6cd5\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
    AJAX\uff08Asynchronous JavaScript and XML\uff09\u662f\u4e00\u79cd\u5229\u7528 XMLHttpReque […]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[115],"tags":[],"class_list":["post-11913","post","type-post","status-publish","format-standard","hentry","category-javascript"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11913","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=11913"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11913\/revisions"}],"predecessor-version":[{"id":13627,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11913\/revisions\/13627"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=11913"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=11913"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=11913"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}