![\"\"](\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/04\/image-84-1024x128.png\")
<\/figure><\/div>\n\n\n\n\u7b80\u4ecb\uff1a\u56de\u8c03(2)<\/pre>\n\n\n\n
- \u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u4ee5\u4e00\u8fb9\u8bfb\u53d6\u6587\u4ef6\uff0c\u4e00\u8fb9\u6267\u884c\u5176\u4ed6\u547d\u4ee4\uff0c\u5728\u6587\u4ef6\u8bfb\u53d6\u5b8c\u6210\u540e\uff0c\u6211\u4eec\u5c06\u6587\u4ef6\u5185\u5bb9\u4f5c\u4e3a\u56de\u8c03\u51fd\u6570\u7684\u53c2\u6570\u8fd4\u56de\u3002\u8fd9\u6837\u5728\u6267\u884c\u4ee3\u7801\u65f6\u5c31\u6ca1\u6709\u963b\u585e\u6216\u7b49\u5f85\u6587\u4ef6 I\/O \u64cd\u4f5c\u3002\u8fd9\u5c31\u5927\u5927\u63d0\u9ad8\u4e86 Node.js \u7684\u6027\u80fd\uff0c\u53ef\u4ee5\u5904\u7406\u5927\u91cf\u7684\u5e76\u53d1\u8bf7\u6c42\u3002<\/li><\/ul>\n\n\n\n
![\"\"](\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/04\/image-85-1024x235.png\")
<\/figure><\/div>\n\n\n\n\u56de\u8c03\u5730\u72f1(\u5384\u8fd0\u91d1\u5b57\u5854)(1)<\/pre>\n\n\n\n
- \u5728Nodejs\u4e2d\u5927\u90e8\u5206\u7684I\/O\u64cd\u4f5c\u51e0\u4e4e\u90fd\u662f\u5f02\u6b65\u7684\uff0c\u4e5f\u5c31\u662f\u6211\u4eec\u5904\u7406I\/O\u7684\u64cd\u4f5c\u7ed3\u679c\u57fa\u672c\u4e0a\u90fd\u9700\u8981\u5728\u56de\u8c03\u51fd\u6570\u4e2d\u5904\u7406\u3002<\/li>
- \u5f53\u5904\u7406\u591a\u4e2a\u4e8b\u4ef6\u65f6\u56de\u8c03\u51fd\u6570\u5c31\u4f1a\u4e00\u5c42\u5c42\u7684\u5d4c\u5957\uff0c\u5f62\u6210\u56de\u8c03\u5730\u72f1\u3002<\/li><\/ul>\n\n\n\n
![\"\"](\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/04\/image-86.png\")
<\/figure><\/div>\n\n\n\n\u56de\u8c03\u5730\u72f1(\u5384\u8fd0\u91d1\u5b57\u5854)(2)<\/pre>\n\n\n\n
- \u4f8b\u5b50\uff0c\u56de\u8c03\u5d4c\u5957\u53ef\u4ee5\u957f\u6210\u8fd9\u6837\uff1a<\/li><\/ul>\n\n\n\n
![\"\"](\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/04\/image-87-1024x322.png\")
<\/figure><\/div>\n\n\n\nPromise\u57fa\u7840(1)<\/pre>\n\n\n\n
- \u4f8b\uff1a\u751f\u4ea7\u8005\u548c\u6d88\u8d39\u8005<\/li>
- \u4f20\u9012\u7ed9 new Promise \u7684\u51fd\u6570\u88ab\u79f0\u4e3a executor<\/strong>\u3002\u5f53 new Promise \u88ab\u521b\u5efa\uff0cexecutor \u4f1a\u81ea\u52a8\u8fd0\u884c\u3002<\/li>
- \u5b83\u7684\u53c2\u6570 resolve \u548c reject \u662f\u7531 JavaScript \u81ea\u8eab\u63d0\u4f9b\u7684\u56de\u8c03\u3002\u5f53 executor \u83b7\u5f97\u4e86\u7ed3\u679c\uff0c\u65e0\u8bba\u662f\u65e9\u8fd8\u662f\u665a\u90fd\u6ca1\u5173\u7cfb\uff0c\u5b83\u5e94\u8be5\u8c03\u7528\u4ee5\u4e0b\u56de\u8c03\u4e4b\u4e00\u3002<\/li><\/ul>\n\n\n\n
![\"\"](\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/04\/image-89-1024x340.png\")
<\/figure><\/div>\n\n\n\nPromise\u57fa\u7840(2)\n<\/pre>\n\n\n\n
- executor \u4f1a\u81ea\u52a8\u8fd0\u884c\u5e76\u5c1d\u8bd5\u6267\u884c\u4e00\u9879\u5de5\u4f5c\u3002\u5c1d\u8bd5\u7ed3\u675f\u540e\uff0c\u5982\u679c\u6210\u529f\u5219\u8c03\u7528 resolve\uff0c\u5982\u679c\u51fa\u73b0 error \u5219\u8c03\u7528 reject\u3002<\/li><\/ul>\n\n\n\n
![\"\"](\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/04\/image-90-1024x210.png\")
<\/figure><\/div>\n\n\n\n- \u7531 new Promise \u6784\u9020\u5668\u8fd4\u56de\u7684 promise \u5bf9\u8c61\u5177\u6709\u4ee5\u4e0b\u5185\u90e8\u5c5e\u6027\uff1a<\/li>
- state \u2014 \u6700\u521d\u662f “pending”\uff0c\u7136\u540e\u5728 resolve \u88ab\u8c03\u7528\u65f6\u53d8\u4e3a “fulfilled”\uff0c\u6216\u8005\u5728 reject \u88ab\u8c03\u7528\u65f6\u53d8\u4e3a “rejected”\u3002<\/li>
- result \u2014 \u6700\u521d\u662f undefined\uff0c\u7136\u540e\u5728 resolve(value) \u88ab\u8c03\u7528\u65f6\u53d8\u4e3a value\uff0c\u6216\u8005\u5728 reject(error) \u88ab\u8c03\u7528\u65f6\u53d8\u4e3a error\u3002<\/li><\/ul>\n\n\n\n
Promise\u57fa\u7840(3)<\/pre>\n\n\n\n
Promise\u72b6\u6001\u8fc1\u79fb\u56fe\uff1a<\/p>\n\n\n\n
![\"\"](\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/04\/image-91-1024x492.png\")
<\/figure><\/div>\n\n\n\n\u4e0e\u6700\u521d\u7684 \u201cpending\u201d promise \u76f8\u53cd\uff0c\u4e00\u4e2a resolved \u6216 rejected \u7684 promise \u90fd\u4f1a\u88ab\u79f0\u4e3a \u201csettled\u201d\u3002<\/p>\n\n\n\n
Promise\u57fa\u7840(4)<\/pre>\n\n\n\n
\u4f8b\uff1a\u6210\u529f\u6267\u884c <\/p>\n\n\n\n
![\"\"](\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/04\/image-92-1024x192.png\")
<\/figure><\/div>\n\n\n\n![\"\"](\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/04\/image-93-1024x414.png\")
<\/figure><\/div>\n\n\n\nPromise\u57fa\u7840(5)<\/pre>\n\n\n\n
\u4f8b\uff1a\u672a\u6210\u529f\u6267\u884c<\/p>\n\n\n\n
![\"\"](\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/04\/image-94-1024x186.png\")
<\/figure><\/div>\n\n\n\n![\"\"](\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/04\/image-95-1024x380.png\")
<\/figure><\/div>\n\n\n\nPromise\u57fa\u7840(6)<\/pre>\n\n\n\n
- executor \u53ea\u80fd\u8c03\u7528\u4e00\u4e2a resolve \u6216\u4e00\u4e2a reject\u3002\u4efb\u4f55\u72b6\u6001\u7684\u66f4\u6539\u90fd\u662f\u6700\u7ec8\u7684\u3002<\/li>
- \u6240\u6709\u5176\u4ed6\u7684\u518d\u5bf9 resolve \u548c reject \u7684\u8c03\u7528\u90fd\u4f1a\u88ab\u5ffd\u7565<\/li>
- resolve\/reject \u53ea\u9700\u8981\u4e00\u4e2a\u53c2\u6570\uff08\u6216\u4e0d\u5305\u542b\u4efb\u4f55\u53c2\u6570\uff09\uff0c\u5e76\u4e14\u5c06\u5ffd\u7565\u989d\u5916\u7684\u53c2\u6570\u3002<\/li><\/ul>\n\n\n\n
![\"\"](\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/04\/image-96-1024x340.png\")
<\/figure><\/div>\n\n\n\nPromise\u57fa\u7840(7)<\/pre>\n\n\n\n
- \u5982\u679c\u6709\u5904\u7406\u51fa\u4e86\u95ee\u9898\uff0c executor \u5e94\u8be5\u8c03\u7528 reject\u3002\u8fd9\u53ef\u4ee5\u4f7f\u7528\u4efb\u4f55\u7c7b\u578b\u7684\u53c2\u6570\u6765\u5b8c\u6210\uff08\u5c31\u50cf resolve \u4e00\u6837\uff09\u3002\u4f46\u662f\u5efa\u8bae\u4f7f\u7528 Error \u5bf9\u8c61\uff08\u6216\u7ee7\u627f\u81ea Error \u7684\u5bf9\u8c61\uff09\u3002<\/li>
- \u5b9e\u9645\u4e0a\uff0cexecutor \u901a\u5e38\u662f\u5f02\u6b65\u6267\u884c\u67d0\u4e9b\u64cd\u4f5c\uff0c\u5e76\u5728\u4e00\u6bb5\u65f6\u95f4\u540e\u8c03\u7528 resolve\/reject\uff0c\u4f46\u8fd9\u4e0d\u662f\u5fc5\u987b\u7684\u3002\u6211\u4eec\u8fd8\u53ef\u4ee5\u7acb\u5373\u8c03\u7528 resolve \u6216 reject\u3002<\/li>
- Promise \u5bf9\u8c61\u7684 state \u548c result \u5c5e\u6027\u90fd\u662f\u5185\u90e8\u7684\u3002\u6211\u4eec\u65e0\u6cd5\u76f4\u63a5\u8bbf\u95ee\u5b83\u4eec\u3002\u4f46\u6211\u4eec\u53ef\u4ee5\u5bf9\u5b83\u4eec\u4f7f\u7528 .then\/.catch\/.finally \u65b9\u6cd5\u3002<\/li><\/ul>\n\n\n\n
Promise\u57fa\u7840(8-1)<\/pre>\n\n\n\n
\u6d88\u8d39\u8005: then<\/strong>, catch, finally<\/p>\n\n\n\n
![\"\"](\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/04\/image-97-1024x437.png\")
<\/figure><\/div>\n\n\n\nPromise\u57fa\u7840(8-2)<\/pre>\n\n\n\n
![\"\"](\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/04\/image-99-1024x418.png\")
<\/figure><\/div>\n\n\n\nPromise\u57fa\u7840(8-3)<\/pre>\n\n\n\n
![\"\"](\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/04\/image-100-1024x448.png\")
<\/figure><\/div>\n\n\n\nPromise\u57fa\u7840(8-4)<\/pre>\n\n\n\n
- \u6d88\u8d39\u8005: then, catch<\/strong>, finally<\/li><\/ul>\n\n\n\n
![\"\"](\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/04\/image-101.png\")
<\/figure><\/div>\n\n\n\nPromise\u57fa\u7840(8-5)<\/pre>\n\n\n\n
- \u6d88\u8d39\u8005: then, catch, finally<\/strong><\/li>
- \u5c31\u50cf\u5e38\u89c4 try {…} catch {…} \u4e2d\u7684 finally \u5b50\u53e5\u4e00\u6837\uff0cpromise \u4e2d\u4e5f\u6709 finally\u3002<\/li>
- finally\u662f\u6267\u884c\u6e05\u7406\uff08cleanup\uff09\u7684\u5f88\u597d\u7684\u5904\u7406\u7a0b\u5e8f\uff08handler\uff09\uff0c\u4f8b\u5982\u65e0\u8bba\u7ed3\u679c\u5982\u4f55\uff0c\u90fd\u505c\u6b62\u4f7f\u7528\u4e0d\u518d\u9700\u8981\u7684\u52a0\u8f7d\u6307\u793a\u7b26\uff08indicator\uff09\u3002<\/li><\/ul>\n\n\n\n
![\"\"](\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/04\/image-102-1024x154.png\")
<\/figure><\/div>\n\n\n\nPromise\u57fa\u7840(8-6)<\/pre>\n\n\n\n
![\"\"](\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/04\/image-103-1024x456.png\")
<\/figure><\/div>\n\n\n\nPromise\u57fa\u7840(9)<\/pre>\n\n\n\n
- \u5982\u679c promise \u4e3a pending \u72b6\u6001\uff0c.then\/catch\/finally \u5904\u7406\u7a0b\u5e8f\uff08handler\uff09\u5c06\u7b49\u5f85\u5b83\u3002\u5426\u5219\uff0c\u5982\u679c promise \u5df2\u7ecf\u662f settled \u72b6\u6001\uff0c\u5b83\u4eec\u5c31\u4f1a\u8fd0\u884c\u3002<\/li><\/ul>\n\n\n\n
![\"\"](\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/04\/image-104-1024x203.png\")
<\/figure><\/div>\n\n\n\nPromise\u94fe(1)<\/pre>\n\n\n\n
![\"\"](\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/04\/image-105-1024x395.png\")
<\/figure><\/div>\n\n\n\nPromise\u94fe(2)<\/pre>\n\n\n\n
![\"\"](\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/04\/image-106-1024x402.png\")
<\/figure><\/div>\n\n\n\nPromise\u94fe(3)<\/pre>\n\n\n\n
- .then(handler) \u4e2d\u6240\u4f7f\u7528\u7684\u5904\u7406\u7a0b\u5e8f\uff08handler\uff09\u53ef\u4ee5\u521b\u5efa\u5e76\u8fd4\u56de\u4e00\u4e2a promise\u3002<\/li><\/ul>\n\n\n\n
- \u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5176\u4ed6\u7684\u5904\u7406\u7a0b\u5e8f\uff08handler\uff09\u5c06\u7b49\u5f85\u5b83 settled \u540e\u518d\u83b7\u5f97\u5176\u7ed3\u679c\uff08result\uff09\u3002<\/li><\/ul>\n\n\n\n
![\"\"](\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/04\/image-107-1024x560.png\")
<\/figure><\/div>\n\n\n\nAsync\/await(1)<\/pre>\n\n\n\n
- Async\/await \u662f\u4ee5\u66f4\u8212\u9002\u7684\u65b9\u5f0f\u4f7f\u7528 promise \u7684\u4e00\u79cd\u7279\u6b8a\u8bed\u6cd5\uff0c\u540c\u65f6\u5b83\u4e5f\u975e\u5e38\u6613\u4e8e\u7406\u89e3\u548c\u4f7f\u7528\u3002<\/li>
- async \u786e\u4fdd\u4e86\u51fd\u6570\u8fd4\u56de\u4e00\u4e2a promise\uff0c\u4e5f\u4f1a\u5c06\u975e promise \u7684\u503c\u5305\u88c5\u8fdb\u53bb\u3002\u5b83\u53ef\u4ee5\u88ab\u653e\u7f6e\u5728\u4e00\u4e2a\u51fd\u6570\u524d\u9762\u3002<\/li>
- await \u5173\u952e\u8bcd\uff0c\u5b83\u53ea\u5728 async \u51fd\u6570\u5185\u5de5\u4f5c\u3002\u8ba9 JavaScript \u5f15\u64ce\u7b49\u5f85\u76f4\u5230 promise \u5b8c\u6210\uff08settle\uff09\u5e76\u8fd4\u56de\u7ed3\u679c\u3002<\/li><\/ul>\n\n\n\n
![\"\"](\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/04\/image-108-1024x205.png\")
<\/figure><\/div>\n\n\n\nAsync\/await(2)<\/pre>\n\n\n\n
- await \u5b9e\u9645\u4e0a\u4f1a\u6682\u505c\u51fd\u6570\u7684\u6267\u884c\uff0c\u76f4\u5230 promise \u72b6\u6001\u53d8\u4e3a settled\uff0c\u7136\u540e\u4ee5 promise \u7684\u7ed3\u679c\u7ee7\u7eed\u6267\u884c\u3002\u8fd9\u4e2a\u884c\u4e3a\u4e0d\u4f1a\u8017\u8d39\u4efb\u4f55 CPU \u8d44\u6e90\uff0c\u56e0\u4e3a JavaScript \u5f15\u64ce\u53ef\u4ee5\u540c\u65f6\u5904\u7406\u5176\u4ed6\u4efb\u52a1\uff1a\u6267\u884c\u5176\u4ed6\u811a\u672c\uff0c\u5904\u7406\u4e8b\u4ef6\u7b49\u3002<\/li><\/ul>\n\n\n\n
![\"\"](\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/04\/image-109-1024x389.png\")
<\/figure><\/div>\n\n\n\nAsync\/await(3)<\/pre>\n\n\n\n
- \u5982\u679c\u4e00\u4e2a promise \u6b63\u5e38 resolve\uff0cawait promise \u8fd4\u56de\u7684\u5c31\u662f\u5176\u7ed3\u679c\u3002\u4f46\u662f\u5982\u679c promise \u88ab reject\uff0c\u5b83\u5c06 throw \u8fd9\u4e2a error\uff0c\u5c31\u50cf\u5728\u8fd9\u4e00\u884c\u6709\u4e00\u4e2a throw \u8bed\u53e5\u90a3\u6837\u3002\u53ef\u4ee5\u7528promise.catch\u5904\u7406error<\/li>
- \u6211\u4eec\u4e5f\u53ef\u4ee5\u7528 try..catch \u6765\u6355\u83b7\u4e0a\u9762\u63d0\u5230\u7684\u90a3\u4e2a error\uff0c\u4e0e\u5e38\u89c4\u7684 throw \u4f7f\u7528\u7684\u662f\u4e00\u6837\u7684\u65b9\u5f0f\uff1a<\/li><\/ul>\n\n\n\n
![\"\"](\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/04\/image-110-1024x227.png\")
<\/figure><\/div>\n\n\n\n![\"\"](\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/04\/image-111-1024x371.png\")
<\/figure><\/div>\n\n\n\nAsync\/await(4)<\/pre>\n\n\n\n
- \u5f53\u6211\u4eec\u4f7f\u7528 async\/await \u65f6\uff0c\u51e0\u4e4e\u5c31\u4e0d\u4f1a\u7528\u5230 .then \u4e86\uff0c\u56e0\u4e3a await \u4e3a\u6211\u4eec\u5904\u7406\u4e86\u7b49\u5f85\u3002\u5e76\u4e14\u6211\u4eec\u4f7f\u7528\u5e38\u89c4\u7684 try..catch \u800c\u4e0d\u662f .catch\u3002\u8fd9\u901a\u5e38\uff08\u4f46\u4e0d\u603b\u662f\uff09\u66f4\u52a0\u65b9\u4fbf\u3002<\/li>
- \u4f46\u662f\u5f53\u6211\u4eec\u5728\u4ee3\u7801\u7684\u9876\u5c42\u65f6\uff0c\u4e5f\u5c31\u662f\u5728\u6240\u6709 async \u51fd\u6570\u4e4b\u5916\uff0c\u6211\u4eec\u5728\u8bed\u6cd5\u4e0a\u5c31\u4e0d\u80fd\u4f7f\u7528 await \u4e86\uff0c\u6240\u4ee5\u8fd9\u65f6\u5019\u901a\u5e38\u7684\u505a\u6cd5\u662f\u6dfb\u52a0 .then\/catch \u6765\u5904\u7406\u6700\u7ec8\u7684\u7ed3\u679c\uff08result\uff09\u6216\u6389\u51fa\u6765\u7684\uff08falling-through\uff09error\uff0c\u4f8b\u5982\u50cf\u4e0a\u9762\u4f8b\u5b5012\u90a3\u6837\u3002<\/li><\/ul>\n\n\n\n
\u7b80\u4ecb\uff1aaxios(1)<\/pre>\n\n\n\n
- axios\u662f\u57fa\u4e8epromise\uff08\u8bfa\u8a00\uff09\u7528\u4e8e\u6d4f\u89c8\u5668\u548cnode.js\u662fhttp\u5ba2\u6237\u7aef\u3002<\/li>
- axios\u4e3b\u8981\u662f\u7528\u4e8e\u5411\u540e\u53f0\u53d1\u8d77\u8bf7\u6c42\u7684\uff0c\u8fd8\u53ef\u5728\u8bf7\u6c42\u4e2d\u505a\u66f4\u591a\u53ef\u63a7\u529f\u80fd\u3002<\/li><\/ul>\n\n\n\n
![\"\"](\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/04\/image-112-1024x323.png\")
<\/figure><\/div>\n\n\n\n\u7b80\u4ecb\uff1aaxios(2)<\/pre>\n\n\n\n
\u8fd9\u662f\u4e00\u6bb5vue\u4ee3\u7801\u3002<\/p>\n\n\n\n
![\"\"](\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/04\/image-113-1024x820.png\")
<\/figure><\/div>\n","protected":false},"excerpt":{"rendered":"\u7b80\u4ecb\uff1a\u56de\u8c03(1) Node.js \u5f02\u6b65\u7f16\u7a0b\u7684\u76f4\u63a5\u4f53\u73b0\u5c31\u662f\u56de\u8c03\u3002 \u5f02\u6b65\u7f16\u7a0b\u4f9d\u6258\u4e8e\u56de\u8c03\u6765\u5b9e\u73b0\uff0c\u4f46\u4e0d\u80fd\u8bf4\u4f7f\u7528\u4e86\u56de\u8c03\u540e […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[],"_links":{"self":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/2385"}],"collection":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2385"}],"version-history":[{"count":30,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/2385\/revisions"}],"predecessor-version":[{"id":2454,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/2385\/revisions\/2454"}],"wp:attachment":[{"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2385"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2385"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2385"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
- await \u5b9e\u9645\u4e0a\u4f1a\u6682\u505c\u51fd\u6570\u7684\u6267\u884c\uff0c\u76f4\u5230 promise \u72b6\u6001\u53d8\u4e3a settled\uff0c\u7136\u540e\u4ee5 promise \u7684\u7ed3\u679c\u7ee7\u7eed\u6267\u884c\u3002\u8fd9\u4e2a\u884c\u4e3a\u4e0d\u4f1a\u8017\u8d39\u4efb\u4f55 CPU \u8d44\u6e90\uff0c\u56e0\u4e3a JavaScript \u5f15\u64ce\u53ef\u4ee5\u540c\u65f6\u5904\u7406\u5176\u4ed6\u4efb\u52a1\uff1a\u6267\u884c\u5176\u4ed6\u811a\u672c\uff0c\u5904\u7406\u4e8b\u4ef6\u7b49\u3002<\/li><\/ul>\n\n\n\n
- \u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5176\u4ed6\u7684\u5904\u7406\u7a0b\u5e8f\uff08handler\uff09\u5c06\u7b49\u5f85\u5b83 settled \u540e\u518d\u83b7\u5f97\u5176\u7ed3\u679c\uff08result\uff09\u3002<\/li><\/ul>\n\n\n\n
- .then(handler) \u4e2d\u6240\u4f7f\u7528\u7684\u5904\u7406\u7a0b\u5e8f\uff08handler\uff09\u53ef\u4ee5\u521b\u5efa\u5e76\u8fd4\u56de\u4e00\u4e2a promise\u3002<\/li><\/ul>\n\n\n\n
- \u6d88\u8d39\u8005: then, catch, finally<\/strong><\/li>
- \u6d88\u8d39\u8005: then, catch<\/strong>, finally<\/li><\/ul>\n\n\n\n
- \u5b83\u7684\u53c2\u6570 resolve \u548c reject \u662f\u7531 JavaScript \u81ea\u8eab\u63d0\u4f9b\u7684\u56de\u8c03\u3002\u5f53 executor \u83b7\u5f97\u4e86\u7ed3\u679c\uff0c\u65e0\u8bba\u662f\u65e9\u8fd8\u662f\u665a\u90fd\u6ca1\u5173\u7cfb\uff0c\u5b83\u5e94\u8be5\u8c03\u7528\u4ee5\u4e0b\u56de\u8c03\u4e4b\u4e00\u3002<\/li><\/ul>\n\n\n\n
- \u4f8b\u5b50\uff0c\u56de\u8c03\u5d4c\u5957\u53ef\u4ee5\u957f\u6210\u8fd9\u6837\uff1a<\/li><\/ul>\n\n\n\n