{"id":6315,"date":"2022-07-12T17:40:32","date_gmt":"2022-07-12T09:40:32","guid":{"rendered":"https:\/\/www.lilichao.com\/?p=6315"},"modified":"2022-07-12T21:41:06","modified_gmt":"2022-07-12T13:41:06","slug":"promise%e3%80%81ajax%ef%bc%88xhr%ef%bc%89%e3%80%81fetch%e5%92%8caxios%e7%9a%84%e5%8c%ba%e5%88%ab","status":"publish","type":"post","link":"https:\/\/lilichao.com\/?p=6315","title":{"rendered":"Promise\u3001Ajax\uff08XHR\uff09\u3001Fetch\u548cAxios\u7684\u533a\u522b"},"content":{"rendered":"\n

\u7b2c\u4e00\u4e2a\u95ee\u9898\uff1a\u540c\u6b65\u548c\u5f02\u6b65<\/h2>\n\n\n\n

\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u6240\u7f16\u5199\u7684JS\u4ee3\u7801\u90fd\u662f\u540c\u6b65\u8fd0\u884c\u7684\u3002<\/p>\n\n\n\n

console.log(123)\nsomeFunction()\/\/ \u9700\u8981\u6267\u884c30\u79d2\u949f\ndocument.write("Hello")<\/code><\/pre><\/div>\n\n\n\n
\u4e0a\u4f8b\u4e2d\u7684\u4ee3\u7801\u5c31\u662f\u540c\u6b65\u4ee3\u7801\uff0cconsole.log()<\/code>\u5148\u6267\u884c\u3001\u7136\u540e\u662fsomeFunction()<\/code>\u6700\u540e\u662fdocument.write()<\/code>\u3002\u540c\u6b65\u610f\u5473\u7740\u4ee3\u7801\u7684\u6267\u884c\u987a\u5e8f\u4e3a\u81ea\u4e0a\u5411\u4e0b\u4e00\u884c\u4e00\u884c\u6267\u884c\uff0c\u6267\u884c\u5b8c\u4e00\u884c\u624d\u4f1a\u6267\u884c\u4e0b\u4e00\u884c\u3002\u5982\u679c\u4ee3\u7801\u4e2d\u6709\u67d0\u4e00\u884c\u6267\u884c\u901f\u5ea6\u6bd4\u8f83\u6162\uff0c\u6bd4\u5982someFunction()<\/code>\u6267\u884c\u901f\u5ea6\u8f83\u6162\uff0c\u9700\u898130\u79d2\u949f\uff0c\u90a3\u4e48\u5176\u540e\u7684\u6240\u6709\u4ee3\u7801\u90fd\u8981\u7b49\u5f85\u5b83\u7684\u6267\u884c\u624d\u80fd\u591f\u7ee7\u7eed\u8fd0\u884c\u3002<\/p>\n\n\n\n
\u8fd9\u6837\u4e00\u6765\uff0c\u5f53\u6211\u4eec\u8c03\u7528\u4e00\u4e9b\u6267\u884c\u901f\u5ea6\u6bd4\u8f83\u6162\u7684\u65b9\u6cd5\u65f6\uff0c\u4f1a\u7531\u4e8e\u5b83\u4e00\u4e2a\u800c\u5f71\u54cd\u5230\u6574\u4e2a\u7a0b\u5e8f\u7684\u6267\u884c\u3002\u6700\u5178\u578b\u7684\u4fbf\u662f\u901a\u8fc7JS\u5411\u670d\u52a1\u5668\u53d1\u9001\u8bf7\u6c42\u3002\u53d1\u9001\u8bf7\u6c42\u65f6\u53d7\u9650\u4e8e\u7f51\u7edc\u7684\u901f\u5ea6\u548c\u6570\u636e\u7684\u591a\u4e0e\u5c11\uff0c\u6267\u884c\u901f\u5ea6\u53ef\u6162\u53ef\u5feb\u3002\u5982\u679c\u4f9d\u7136\u4f7f\u7528\u540c\u6b65\u7684\u7f16\u7a0b\u65b9\u5f0f\uff0c\u5c06\u5927\u5927\u7684\u5f71\u54cd\u5230\u7a0b\u5e8f\u7684\u6267\u884c\u6027\u80fd\u3002<\/p>\n\n\n\n
\u5982\u4f55\u89e3\u51b3\u5462\uff1f\u9996\u5148\u6211\u4eec\u6765\u770b\u770b\u53d1\u9001\u8bf7\u6c42\u7684\u8fc7\u7a0b\uff1a\u2460JS\u5411\u670d\u52a1\u5668\u53d1\u9001\u8bf7\u6c42\uff1b\u2461\u8bf7\u6c42\u5230\u8fbe\u670d\u52a1\u5668\uff0c\u670d\u52a1\u5668\u5904\u7406\u8bf7\u6c42\u5e76\u8fd4\u56de\u6570\u636e\uff1b\u2462JS\uff08\u6d4f\u89c8\u5668\uff09\u6536\u5230\u5e76\u5904\u7406\u6570\u636e\u3002\u6574\u4e2a\u8fc7\u7a0b\u4e2dJS\u8981\u5904\u7406\u7684\u662f\u5411\u670d\u52a1\u5668\u53d1\u9001\u6570\u636e\u548c\u63a5\u6536\u670d\u52a1\u5668\u8fd4\u56de\u7684\u6570\u636e\uff0c\u4e5f\u5c31\u662f\u2460\u548c\u2462\u3002\u670d\u52a1\u5668\u5904\u7406\u6570\u636e\uff0c\u8fd4\u56de\u54cd\u5e94\uff08\u4e5f\u5c31\u662f\u2461\uff09\u8fd9\u4e00\u8fc7\u7a0b\u662f\u65e0\u9700JS\u53c2\u4e0e\u7684\u3002\u4f46\u662f\u5982\u679c\u6211\u4eec\u4f9d\u7136\u4f7f\u7528\u540c\u6b65\u7684\u65b9\u5f0f\u6765\u7f16\u5199\u4ee3\u7801\uff0c\u90a3\u4e48\u5c31\u5fc5\u987b\u8981\u7b49\u5f85\u670d\u52a1\u5668\u5904\u7406\u5b8c\u6bd5\u624d\u80fd\u7ee7\u7eed\u8fd0\u884c\u540e\u8fb9\u7684\u7a0b\u5e8f\uff0c\u5e76\u4e14\u5728\u7b49\u5f85\u8fc7\u7a0b\u4e2d\u7528\u6237\u4ec0\u4e48\u4e8b\u60c5\u4e5f\u505a\u4e0d\u4e86\uff0c\u53ea\u80fd\u5e72\u7b49\u3002<\/p>\n\n\n\n
\u5982\u679c\u662f\u5176\u4ed6\u7684\u7f16\u7a0b\u8bed\u8a00\uff0c\u5b8c\u5168\u53ef\u4ee5\u5728\u5f00\u4e00\u4e2a\u65b0\u7684\u7ebf\u7a0b\uff0c\u4e00\u4e2a\u7ebf\u7a0b\u8d1f\u8d23\u7b49\u5f85\uff0c\u4e00\u4e2a\u7ebf\u7a0b\u53bb\u505a\u522b\u7684\u4e8b\u60c5\u3002\u4f46\u662fJS\u4e0d\u884c\uff0cJS\u662f\u5355\u7ebf\u7a0b\u7684\uff0c\u53ea\u6709\u4e00\u4e2a\u7ebf\u7a0b\uff0c\u6ca1\u6709\u5176\u4ed6\u7ebf\u7a0b\u53ef\u4f9b\u9009\u62e9\u3002\u90a3\u4e48\u6446\u5728\u6211\u4eec\u9762\u524d\u7684\u6709\u4e24\u6761\u8def\uff0c\u4e00\u6761\u8def\u662f\u8ba9\u7ebf\u7a0b\u4e00\u76f4\u7b49\u5f85\uff0c\u76f4\u5230\u670d\u52a1\u5668\u8fd4\u56de\u6570\u636e\u624d\u7ee7\u7eed\u5411\u4e0b\u6267\u884c\u4ee3\u7801\u3002\u7b2c\u4e8c\u6761\u8def\uff0c\u7ebf\u7a0b\u4e0d\u7b49\u5f85\uff0c\u5148\u53bb\u8fd0\u884c\u522b\u7684\u4ee3\u7801\uff0c\u7b49\u5230\u670d\u52a1\u5668\u6570\u636e\u8fd4\u56de\u4e86\uff0c\u518d\u56de\u6765\u5904\u7406\u6570\u636e\u3002\u663e\u7136\uff0c\u7b2c\u4e00\u6761\u8def\u4e0d\u662f\u4e00\u4e2a\u597d\u7684\u9009\u62e9\u3002\u800c\u7b2c\u4e8c\u6761\u8def\u4e2d\u4ee3\u7801\u7684\u8fd0\u884c\u65b9\u5f0f\u5c31\u662f\u5f02\u6b65\u3002<\/p>\n\n\n\n
\u6240\u8c13\u5f02\u6b65\uff0c\u6307\u4ee3\u7801\u5e76\u4e0d\u6309\u7167\u56fa\u5b9a\u7684\u987a\u5e8f\u4e00\u884c\u6267\u884c\u5b8c\u518d\u6267\u884c\u4e0b\u4e00\u884c\uff0c\u5f53\u9047\u5230\u4e00\u4e9b\u9700\u8981\u7b49\u5f85\u5176\u4ed6\u8fdb\u7a0b\u6267\u884c\u7684\u64cd\u4f5c\u65f6\uff08\u6bd4\u5982\uff1a\u53d1\u9001\u8bf7\u6c42\uff0c\u8bbf\u95ee\u7528\u6237\u8bbe\u5907\u7b49\uff09\u4e0d\u518d\u7b49\u5f85\uff0c\u800c\u662f\u7ee7\u7eed\u5411\u4e0b\u6267\u884c\u5176\u4ed6\u529f\u80fd\uff0c\u76f4\u5230\u90a3\u4e9b\u9700\u8981\u7b49\u5f85\u7684\u64cd\u4f5c\u5b8c\u6210\u540e\uff0c\u624d\u56de\u6765\u5b8c\u6210\u540e\u7eed\u5de5\u4f5c\u3002<\/p>\n\n\n\n
\u540c\u6b65\u4ee3\u7801\u6d41\u7a0b\uff1a<\/p>\n\n\n\n
  1. \u53d1\u9001\u8bf7\u6c42<\/li>
  2. \u7b49\u5f85\u670d\u52a1\u5668<\/li>
  3. \u83b7\u5f97\u54cd\u5e94\u6570\u636e\uff0c\u6e32\u67d3\u7ec4\u4ef6<\/li>
  4. \u5176\u4ed6\u64cd\u4f5c<\/li><\/ol>\n\n\n\n
    \u5f02\u6b65\u4ee3\u7801\u6d41\u7a0b\uff1a<\/p>\n\n\n\n
    1. \u53d1\u9001\u8bf7\u6c42<\/li>
    2. \u5176\u4ed6\u64cd\u4f5c<\/li>
    3. \u5f53\u670d\u52a1\u5668\u8fd4\u56de\u54cd\u5e94\u65f6\uff1a\u83b7\u5f97\u54cd\u5e94\u6570\u636e\uff0c\u6e32\u67d3\u7ec4\u4ef6<\/li><\/ol>\n\n\n\n
      Ajax<\/h2>\n\n\n\n
      Ajax\u662f\u65e9\u671f\u7684JS\u4e2d\u53d1\u9001\u5f02\u6b65\u8bf7\u6c42\u7684\u65b9\u5f0f\uff0c\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n\n\n\n
      var xhr = new XMLHttpRequest()\n\nxhr.onload = () => {\n    console.log(JSON.parse(xhr.response))\n    document.body.insertAdjacentHTML("beforeend", xhr.response)       \n}\n\nxhr.open("get","https:\/\/mdn.github.io\/learning-area\/javascript\/apis\/fetching-data\/can-store\/products.json")\nxhr.send()<\/code><\/pre><\/div>\n\n\n\n
      Ajax\u7684\u5f02\u6b65\u5904\u7406\u65b9\u5f0f\u662f\u57fa\u4e8e\u4e8b\u4ef6\u7684\uff0c\u5728\u521b\u5efa\u73a9xhr\u5bf9\u8c61\u540e\uff0c\u4f1a\u4e3a\u5176onload\u4e8b\u4ef6\uff08\u6216onreadystatechange\u4e8b\u4ef6\uff09\u7ed1\u5b9a\u4e00\u4e2a\u56de\u8c03\u51fd\u6570\uff0c\u4e8b\u4ef6\u4f1a\u5728\u670d\u52a1\u5668\u7684\u54cd\u5e94\u6570\u636e\u8fd4\u56de\u540e\u89e6\u53d1\u3002\u8fd9\u6837\u5f53\u6211\u4eec\u5411\u670d\u52a1\u5668\u53d1\u9001\u8bf7\u6c42\u540e\uff0c\u4ee3\u7801\u4e0d\u4f1a\u88ab\u963b\u585e\uff0c\u800c\u662f\u7ee7\u7eed\u8fd0\u884c\uff08\u671f\u95f4\u4e0d\u4f1a\u5f71\u54cd\u5230\u7528\u6237\u7684\u64cd\u4f5c\uff09\u3002\u76f4\u5230\u670d\u52a1\u5668\u6570\u636e\u6b63\u5e38\u8fd4\u56de\uff0conload\u4e8b\u4ef6\u88ab\u89e6\u53d1\uff0c\u56de\u8c03\u51fd\u6570\u624d\u4f1a\u6267\u884c\u3002<\/p>\n\n\n\n
      \u56de\u8c03\u51fd\u6570\u7684\u56f0\u6270<\/h2>\n\n\n\n
      \u901a\u8fc7\u56de\u8c03\u51fd\u6570\u5b9e\u73b0\u5f02\u6b65\u65f6\uff0c\u56de\u8c03\u51fd\u6570\u4f1a\u5728\u90a3\u4e9b\u9700\u8981\u7b49\u5f85\u7684\u64cd\u4f5c\u5b8c\u6210\u540e\u624d\u6267\u884c\u3002\u53ea\u8981\u8fd9\u6837\u624d\u80fd\u786e\u4fdd\u529f\u80fd\u6b63\u5e38\u6267\u884c\uff0c\u8fd9\u662f\u56e0\u4e3a\u56de\u8c03\u51fd\u6570\u7684\u6267\u884c\uff0c\u901a\u5e38\u4f1a\u4f9d\u8d56\u64cd\u4f5c\u5b8c\u6210\u540e\u6240\u4ea7\u751f\u7684\u6570\u636e\uff0c\u6bd4\u5982\u5728Ajax\u7684\u56de\u8c03\u51fd\u6570\u4e2d\u5c31\u9700\u8981\u7f16\u5199\u5904\u7406\u54cd\u5e94\u6570\u636e\u7684\u4ee3\u7801\uff0c\u54cd\u5e94\u6570\u636e\u56de\u6765\u4e4b\u524d\u51fd\u6570\u662f\u4e0d\u80fd\u6267\u884c\u7684\u3002<\/p>\n\n\n\n
      \u5982\u679c\u662f\u7b80\u5355\u7684\u56de\u8c03\u8fd8\u597d\uff0c\u4f46\u662f\u4e00\u65e6\u9047\u5230\u590d\u6742\u7684\u591a\u6b21\u56de\u8c03\uff0c\u4e8b\u60c5\u4e5f\u8bb8\u5c31\u4e0d\u90a3\u4e48\u7f8e\u5999\u4e86\u3002\u6bd4\u5982\uff1a\u6709\u56db\u4e2a\u51fd\u6570fn1()<\/code>\u3001fn2()<\/code>\u3001fn3()<\/code>\u548cfn4()<\/code>\uff0c\u56db\u4e2a\u51fd\u6570\u4e92\u76f8\u4f9d\u8d56\uff0c2\u9700\u89811\u7684\u8fd4\u56de\u503c\uff0c3\u9700\u89812\u7684\u8fd4\u56de\u503c\uff0c4\u9700\u89813\u7684\u8fd4\u56de\u503c\u3002\u50cf\u662f\u8fd9\u6837\uff1a<\/p>\n\n\n\n
      function fn1(num){\n    return num + 1\n}\n\nfunction fn2(num){\n    return num + 2\n}\n\nfunction fn3(num){\n    return num + 3\n}\n\nfunction fn4(num){\n    return num + 4\n}\n\nlet result = fn1(10)\nresult = fn2(result)\nresult = fn3(result)\nresult = fn4(result)<\/code><\/pre><\/div>\n\n\n\n
      \u51e0\u4e2a\u51fd\u6570\u5e76\u6ca1\u6709\u4ec0\u4e48\u610f\u4e49\uff0c\u5355\u7eaf\u7ed3\u6784\u4e0a\u7684\u5c55\u793a\u3002\u4fee\u6539\u4e3a\u56de\u8c03\u51fd\u6570\u7684\u7248\u672c\uff0c\u5c31\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n\n\n\n
      function fn1(num, callback){\n    return callback(num + 1)\n}\n\nfunction fn2(num, callback){\n    return callback(num + 2)\n}\n\nfunction fn3(num, callback){\n    return callback(num + 3)\n}\n\nfunction fn4(num, callback){\n    return callback(num + 4)\n}\n\nfn1(10, n=>{\n    fn2(n, n=>{\n        fn3(n, n => {\n            fn4(n, n => {\n                console.log(n)\n            })\n        })\n    })\n})<\/code><\/pre><\/div>\n\n\n\n
      \u6211\u5c31\u95ee\u4f60\uff0c\u770b\u89c1\u8fd9\u79cd\u4ee3\u7801\u4f60\u6076\u5fc3\u4e0d\u6076\u5fc3\u3002\u8fd9\u79cd\u4ee3\u7801\u7ed3\u6784\u88ab\u79f0\u4e3a\u201c\u56de\u8c03\u5730\u72f1\u201d\u6216\u8005\u201c\u672b\u65e5\u91d1\u5b57\u5854\u201d\uff0c\u542c\u8fd9\u4e2a\u540d\u5b57\u5c31\u5341\u5206\u7684\u6666\u6c14\uff0c\u8fd9\u91cc\u6211\u5c31\u4e0d\u8fc7\u591a\u7684\u89e3\u91ca\u4e86\u3002\u8fc7\u591a\u7684\u56de\u8c03\u589e\u52a0\u4e86\u4ee3\u7801\u7684\u590d\u6742\u5ea6\uff0c\u975e\u5e38\u7684\u4e0d\u6613\u4e8e\u7ef4\u62a4\u3002\u53ef\u662f\u5f02\u6b65\u672c\u8eab\u53c8\u5341\u5206\u4f9d\u8d56\u4e8e\u56de\u8c03\u51fd\u6570\uff0c\u6240\u4ee5\u8981\u5199\u597d\u5f02\u6b65\u4ee3\u7801\u5fc5\u987b\u5148\u5904\u7406\u597d\u56de\u8c03\u51fd\u6570\u7684\u95ee\u9898\u3002<\/p>\n\n\n\n
      Promise<\/h2>\n\n\n\n
      \u56de\u8c03\u51fd\u6570\u7684\u95ee\u9898\u4e3b\u8981\u5728\u4e8e\u5d4c\u5957\uff0c\u56de\u8c03\u51fd\u6570\u4e4b\u6240\u4ee5\u5d4c\u5957\u662f\u56e0\u4e3a\u5f53\u524d\u7684\u56de\u8c03\u51fd\u6570\u4f9d\u8d56\u4e8e\u4e0a\u4e00\u4e2a\u56de\u8c03\u51fd\u6570\u7684\u6267\u884c\u7ed3\u679c\uff0c\u4e3a\u4e86\u786e\u4fdd\u5728\u4e0a\u4e00\u4e2a\u56de\u8c03\u51fd\u6570\u6267\u884c\u5b8c\u6bd5\u540e\u5f53\u524d\u56de\u8c03\u51fd\u6570\u624d\u6267\u884c\uff0c\u6211\u4eec\u53ea\u80fd\u5728\u4e0a\u4e00\u4e2a\u56de\u8c03\u51fd\u6570\u4e2d\u8c03\u7528\u5f53\u524d\u7684\u56de\u8c03\u51fd\u6570\u3002\u600e\u4e48\u80fd\u907f\u514d\u8fd9\u4e2a\u95ee\u9898\u5462\uff1fPromise\u5e94\u8fd0\u800c\u751f\u3002<\/p>\n\n\n\n
      Promise\u76f4\u8bd1\u8fc7\u6765\u4e3a\u201c\u627f\u8bfa\u201d\u3002\u5b83\u53ef\u4ee5\u7528\u6765\u5b58\u50a8\u5f02\u6b65\u4ee3\u7801\uff08\u540c\u6b65\u4ee3\u7801\u4ea6\u53ef\uff09\uff0c\u5e76\u4e14\u5b83\u53ef\u4ee5\u786e\u4fdd\u65e0\u8bba\u5f02\u6b65\u4ee3\u7801\u6267\u884c\u6210\u529f\u6216\u5931\u8d25\u90fd\u4f1a\u7ed9\u6211\u4eec\u8fd4\u56de\u4e00\u4e2a\u7ed3\u679c\u3002\u5982\u6b64\u4e00\u6765\uff0c\u6211\u4eec\u4fbf\u53ef\u4ee5\u76f4\u63a5\u5c06\u51fd\u6570\u7684\u4ee3\u7801\u76f4\u63a5\u5b58\u50a8\u5230Promise\u4e2d\uff0c\u7136\u540e\u5c06Promise\u4f5c\u4e3a\u8fd4\u56de\u503c\u8fd4\u56de\uff0c\u8fd9\u6837\u56de\u8c03\u51fd\u6570\u53ef\u4ee5\u76f4\u63a5\u901a\u8fc7Promise\u6765\u83b7\u53d6\u4e0a\u4e00\u4e2a\u51fd\u6570\u7684\u6267\u884c\u7ed3\u679c\uff0c\u5e76\u4e14Promise\u4f1a\u786e\u4fdd\u53ea\u6709\u5f97\u5230\u7ed3\u679c\u65f6\uff0c\u624d\u4f1a\u8c03\u7528\u56de\u8c03\u51fd\u6570\u3002<\/p>\n\n\n\n
      \u793a\u4f8b\uff1a<\/p>\n\n\n\n
      const myPromise = new Promise((resolve) => {\n    \/\/ \u5f02\u6b65\u4ee3\u7801...\n    resolve(10) \/\/ \u8fd4\u56de\u8fd0\u884c\u7ed3\u679c\n})\n\nmyPromise\n    .then(result => console.log(result))\n    .catch(e => console.log("\u4ee3\u7801\u51fa\u9519", err))<\/code><\/pre><\/div>\n\n\n\n
      \u9996\u5148\uff0c\u4f7f\u7528new Promise()<\/code>\u6765\u521b\u5efa\u4e00\u4e2aPromise\u5bf9\u8c61\uff0c\u5b83\u9700\u8981\u4e00\u4e2a\u56de\u8c03\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\uff0c\u53ef\u4ee5\u5c06\u5f02\u6b65\u7684\u4ee3\u7801\u76f4\u63a5\u7f16\u5199\u5230\u56de\u8c03\u51fd\u6570\u4e2d\u3002\u56de\u8c03\u51fd\u6570\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u4e00\u4e2a\u51fd\u6570\uff0c\u8fd9\u91cc\u547d\u540d\u4e3aresolve\uff0c\u53ef\u4ee5\u5728\u5f02\u6b65\u529f\u80fd\u5b8c\u6210\u540e\u5bf9\u5176\u8fdb\u884c\u8c03\u7528\uff0c\u7136\u540e\u5c06\u671f\u671b\u8fd4\u56de\u7684\u7ed3\u679c\u8bbe\u7f6e\u4e3a\u5b83\u7684\u5b9e\u53c2\u3002<\/p>\n\n\n\n
      \u53ef\u4ee5\u5c06Promise\u5bf9\u8c61\u7406\u89e3\u4e3a\u5b58\u50a8\u5f02\u6b65\u4ee3\u7801\u7ed3\u679c\u7684\u5bb9\u5668\uff0c\u5f02\u6b65\u4ee3\u7801\u7684\u6267\u884c\u7ed3\u679c\u90fd\u5b58\u50a8\u5230\u4e86\u8be5\u5bf9\u8c61\u4e2d\uff0c\u90a3\u4e48\u5982\u4f55\u8bfb\u53d6\u5462\uff1f\u53ef\u4ee5\u76f4\u63a5\u8c03\u7528promise\u5bf9\u8c61\u7684then\u65b9\u6cd5\uff0c\u5e76\u4f20\u9012\u4e00\u4e2a\u56de\u8c03\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\uff0c\u6267\u884c\u7ed3\u679c\u4f1a\u901a\u8fc7\u56de\u8c03\u51fd\u6570\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u8fd4\u56de\u3002\u5982\u679c\u5f02\u6b65\u4ee3\u7801\u6267\u884c\u5931\u8d25\uff0cthen\u7684\u56de\u8c03\u51fd\u6570\u4e0d\u4f1a\u6267\u884c\uff0c\u800c\u662f\u6267\u884ccatch()\u65b9\u6cd5\u7684\u56de\u8c03\u51fd\u6570\u3002\u5173\u4e8ePromise\u7684\u5185\u5bb9\u8fd8\u6709\u633a\u591a\uff0c\u4f46\u662f\u8fd9\u8282\u8bfe\u4e3b\u8981\u8fd8\u662f\u4ecb\u7ecdPromise\u6240\u4ee5\u8fd9\u91cc\u4e0d\u518d\u8fc7\u591a\u5f3a\u8c03\u3002<\/p>\n\n\n\n
      Fetch<\/h2>\n\n\n\n
      Fetch\u662fAjax\u7684\u8fdb\u5316\u7248\uff0c\u76f4\u63a5\u4f7f\u7528\u4e86Fetch API\uff0c\u76f8\u8f83\u4e8eAjax\u66f4\u52a0\u7b80\u4fbf\uff1a<\/p>\n\n\n\n
      fetch("https:\/\/mdn.github.io\/learning-area\/javascript\/apis\/fetching-data\/can-store\/products.json")\n    .then(res => res.json())\n    .then(data => {\n        console.log(data)\n        document.body.insertAdjacentHTML("beforeend", JSON.stringify(data))\n    })<\/code><\/pre><\/div>\n\n\n\n
      Axios<\/h2>\n\n\n\n
      Axios\u662f\u4e00\u4e2a\u7b2c\u4e09\u65b9\u7684\u53d1\u9001\u8bf7\u6c42\u7684\u5de5\u5177\uff0c\u4e3b\u8981\u662f\u7528\u6765\u4ee3\u66ff\u7684Ajax\uff0c\u540c\u6837\u652f\u6301Promise\uff0c\u4e14\u529f\u80fd\u4e5f\u8f83Ajax\u548cFetch\u8981\u5f3a\u5927\u4e00\u4e9b\uff0c\u53ea\u662f\u4f7f\u7528\u65f6\u9700\u8981\u5f15\u5165\u7b2c\u4e09\u65b9\u5e93\uff1a<\/p>\n\n\n\n
      <script src="https:\/\/unpkg.com\/axios\/dist\/axios.min.js"><\/script>\n\n<script>\n  \n    axios\n        .get(\n            "https:\/\/mdn.github.io\/learning-area\/javascript\/apis\/fetching-data\/can-store\/products.json"\n        )\n        .then(function (response) {\n            console.log(response)\n        })\n        .catch(function (error) {\n            console.log(error)\n        })\n    \n<\/script><\/code><\/pre><\/div>\n\n\n\n
      \u603b\u7ed3\uff1a<\/p>\n\n\n\n
      \u6280\u672f<\/td>\u539f\u751f<\/td>\u4f5c\u7528<\/td><\/tr>
      Ajax<\/td>\u221a<\/td>\u53d1\u9001\u8bf7\u6c42<\/td><\/tr>
      Fetch<\/td>\u221a<\/td>\u53d1\u9001\u8bf7\u6c42<\/td><\/tr>
      Axios<\/td>\u00d7<\/td>\u53d1\u9001\u8bf7\u6c42<\/td><\/tr>
      Promise<\/td>\u221a<\/td>\u4e3a\u5f02\u6b65\u63d0\u4f9b\u652f\u6301<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
      \u6e90\u7801\uff1a<\/h2>\n\n\n\n
      \u94fe\u63a5\uff1ahttps:\/\/pan.baidu.com\/s\/1LJwOqOqRvocX5Y48wCJ3BA?pwd=ehp8<\/a>
      \u63d0\u53d6\u7801\uff1aehp8<\/p>\n","protected":false},"excerpt":{"rendered":"
      \u7b2c\u4e00\u4e2a\u95ee\u9898\uff1a\u540c\u6b65\u548c\u5f02\u6b65 \u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u6240\u7f16\u5199\u7684JS\u4ee3\u7801\u90fd\u662f\u540c\u6b65\u8fd0\u884c\u7684\u3002 \u4e0a\u4f8b\u4e2d\u7684\u4ee3\u7801\u5c31\u662f\u540c\u6b65\u4ee3\u7801\uff0cconso […]<\/p>\n","protected":false},"author":1,"featured_media":6282,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[271],"tags":[],"_links":{"self":[{"href":"https:\/\/lilichao.com\/index.php?rest_route=\/wp\/v2\/posts\/6315"}],"collection":[{"href":"https:\/\/lilichao.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lilichao.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lilichao.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lilichao.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6315"}],"version-history":[{"count":6,"href":"https:\/\/lilichao.com\/index.php?rest_route=\/wp\/v2\/posts\/6315\/revisions"}],"predecessor-version":[{"id":6324,"href":"https:\/\/lilichao.com\/index.php?rest_route=\/wp\/v2\/posts\/6315\/revisions\/6324"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lilichao.com\/index.php?rest_route=\/wp\/v2\/media\/6282"}],"wp:attachment":[{"href":"https:\/\/lilichao.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6315"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lilichao.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6315"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lilichao.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6315"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}