{"id":16641,"date":"2025-01-15T01:32:18","date_gmt":"2025-01-14T22:02:18","guid":{"rendered":"https:\/\/www.itpiran.net\/blog\/?p=16641"},"modified":"2025-01-15T01:32:18","modified_gmt":"2025-01-14T22:02:18","slug":"what-is-typescript-and-why-should-you-use-it","status":"publish","type":"post","link":"https:\/\/www.itpiran.net\/blog\/zh\/tutorials\/what-is-typescript-and-why-should-you-use-it\/","title":{"rendered":"\u4ec0\u4e48\u662f TypeScript\uff1f\u4e3a\u4ec0\u4e48\u8981\u4f7f\u7528\u5b83\uff1f"},"content":{"rendered":"<h2 id=\"%d9%85%d9%82%d8%af%d9%85%d9%87\">\u4ecb\u7ecd<\/h2>\n<p>\u5bf9\u4e8e\u5f00\u53d1\u8005\u800c\u8a00\uff0cTypeScript \u7f16\u7a0b\u8bed\u8a00\u76f8\u6bd4 JavaScript \u5177\u6709\u8bf8\u591a\u4f18\u52bf\u3002TypeScript \u63d0\u4f9b\u4e86\u66f4\u591a\u529f\u80fd\uff0c\u4f7f\u5f00\u53d1\u8005\u80fd\u591f\u6784\u5efa\u66f4\u590d\u6742\u3001\u66f4\u6613\u51fa\u9519\u7684\u4ea4\u4e92\u5f0f\u5e94\u7528\u7a0b\u5e8f\u548c\u7f51\u7ad9\u3002.<\/p>\n<p>TypeScript \u8fd8\u62e5\u6709\u5e9e\u5927\u7684\u5f00\u53d1\u8005\u5de5\u5177\u751f\u6001\u7cfb\u7edf\uff0c\u63d0\u4f9b\u5185\u8054\u6587\u6863\u548c\u5b9e\u65f6\u4ee3\u7801\u5ba1\u67e5\u529f\u80fd\uff0c\u8ba9\u60a8\u5728\u5de5\u4f5c\u65f6\u66f4\u5bb9\u6613\u53d1\u73b0\u7f16\u7801\u9519\u8bef\u3002.<\/p>\n<p>\u672c\u6587\u89e3\u91ca\u4e86 TypeScript \u662f\u4ec0\u4e48\u4ee5\u53ca\u5b83\u4e0e JavaScript \u7684\u5173\u7cfb\uff0c\u5e76\u63d0\u4f9b\u4e86\u8d44\u6e90\u6765\u5e2e\u52a9\u60a8\u5f00\u59cb\u6784\u5efa\u524d\u7aef\u548c\u540e\u7aef\u5e94\u7528\u7a0b\u5e8f\u3002.<\/p>\n<h2 id=\"typescript-%da%86%db%8c%d8%b3%d8%aa%d8%9f\">\u4ec0\u4e48\u662f TypeScript\uff1f<\/h2>\n<p>TypeScript \u662f\u4e00\u79cd\u7f16\u7a0b\u8bed\u8a00\uff0c\u5b83\u4e3a JavaScript \u6dfb\u52a0\u989d\u5916\u7684\u529f\u80fd\u3002.<\/p>\n<p>JavaScript \u6700\u521d\u7684\u8bbe\u8ba1\u76ee\u7684\u5e76\u975e\u9a71\u52a8\u590d\u6742\u7684\u524d\u7aef\u548c\u540e\u7aef\u5e94\u7528\u7a0b\u5e8f\uff0c\u800c\u662f\u4e3a\u7f51\u7ad9\u6dfb\u52a0\u7b80\u5355\u7684\u4ea4\u4e92\u529f\u80fd\uff0c\u4f8b\u5982\u521b\u5efa\u53ef\u70b9\u51fb\u7684\u6309\u94ae\u548c\u52a8\u753b\u4e0b\u62c9\u83dc\u5355\u3002.<\/p>\n<p>\u7136\u800c\uff0cJavaScript \u5728\u5f00\u53d1\u8005\u4e2d\u6d41\u884c\u8d77\u6765\uff0c\u4ed6\u4eec\u53d1\u73b0\u4e86\u5b83\u66f4\u5e7f\u6cdb\u7684\u7528\u9014\uff0c\u4f46\u4e5f\u56e0\u6b64\u5e26\u6765\u4e86\u4e00\u4e9b\u95ee\u9898\uff1a\u8fd9\u95e8\u8bed\u8a00\u8fc7\u4e8e\u5bbd\u5bb9\u3002\u5f00\u53d1\u8005\u5f88\u5bb9\u6613\u72af\u7f16\u7a0b\u9519\u8bef\u6216\u8bef\u7528\u67d0\u4e9b\u529f\u80fd\uff0c\u5bfc\u81f4\u5e94\u7528\u7a0b\u5e8f\u5d29\u6e83\uff1b\u6b64\u5916\uff0cJavaScript \u8fd8\u7f3a\u5c11\u8bb8\u591a\u5176\u4ed6\u8bed\u8a00\u6240\u5177\u5907\u7684\u529f\u80fd\u3002TypeScript \u7684\u5f00\u53d1\u6b63\u662f\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e9b\u95ee\u9898\uff0c\u540c\u65f6\u8fd8\u8981\u4e0e\u73b0\u6709\u7684 JavaScript \u73af\u5883\u517c\u5bb9\u3002.<\/p>\n<p>TypeScript \u662f\u4e00\u79cd\u9759\u6001\u7c7b\u578b\u8bed\u8a00\uff0c\u5b83\u662f JavaScript \u7684\u8d85\u96c6\uff0c\u5e76\u57fa\u4e8e JavaScript \u73b0\u6709\u7684\u8bed\u6cd5\u548c\u529f\u80fd\u6784\u5efa\u800c\u6210\u3002\u8fd9\u610f\u5473\u7740\u4f60\u53ef\u4ee5\u5728 TypeScript \u4ee3\u7801\u4e2d\u4f7f\u7528 JavaScript\uff0c\u4f46\u4e0d\u80fd\u5728 JavaScript \u4ee3\u7801\u4e2d\u4f7f\u7528 TypeScript\uff0c\u56e0\u4e3a TypeScript \u4ee3\u7801\u4f7f\u7528\u4e86\u4e00\u4e9b JavaScript \u4e2d\u4e0d\u5b58\u5728\u7684\u7279\u6027\u548c\u8bed\u6cd5\u3002.<\/p>\n<p>TypeScript \u5fc5\u987b\u7f16\u8bd1\u6210 JavaScript \u624d\u80fd\u5728 Web \u6d4f\u89c8\u5668\u548c Node.js \u7b49\u73af\u5883\u4e2d\u8fd0\u884c\uff08\u4e4b\u6240\u4ee5\u79f0\u4e4b\u4e3a\u201c\u7f16\u8bd1\u540e\u201d\uff0c\u662f\u56e0\u4e3a\u5b83\u4e0d\u4f1a\u88ab\u7ffb\u8bd1\u6210\u5e95\u5c42\u8bed\u8a00\uff09\u3002TypeScript \u4ee3\u7801\u7f16\u8bd1\u6210 JavaScript \u540e\uff0c\u751f\u6210\u7684 JavaScript \u4ee3\u7801\u4e0d\u80fd\u76f4\u63a5\u7f16\u8f91\u3002.<\/p>\n<p>\u6784\u5efa TypeScript \u5e94\u7528\u7684\u5de5\u4f5c\u6d41\u7a0b\u662f\uff1a\u5148\u7528 TypeScript \u7f16\u5199\u4ee3\u7801\uff0c\u7136\u540e\u7f16\u8bd1\u6210 JavaScript\uff0c\u6700\u540e\u90e8\u7f72\u3002\u867d\u7136\u8fd9\u989d\u5916\u7684\u6b65\u9aa4\u770b\u4f3c\u589e\u52a0\u4e86\u4e0d\u5fc5\u8981\u7684\u590d\u6742\u6027\uff0c\u4f46\u5b83\u7684\u5b58\u5728\u81ea\u6709\u5176\u9053\u7406\uff1a\u5982\u679c TypeScript \u662f\u4e00\u79cd\u5168\u65b0\u7684\u8bed\u8a00\uff0c\u5b83\u5c31\u6beb\u65e0\u4ef7\u503c\uff0c\u4f46\u7531\u4e8e\u5b83\u53ef\u4ee5\u7f16\u8bd1 JavaScript \u4ee3\u7801\uff0c\u4f7f\u5176\u80fd\u591f\u5728\u73b0\u6709\u7cfb\u7edf\u4e0a\u8fd0\u884c\uff0c\u56e0\u6b64\u88ab\u5e7f\u6cdb\u63a5\u53d7\u3002.<\/p>\n<p>TypeScript \u7684\u6587\u4ef6\u6269\u5c55\u540d\u662f .ts\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u540d\u4e3a index.ts \u7684\u793a\u4f8b\u6587\u4ef6\uff0c\u5176\u4e2d\u5305\u542b\u4e00\u4e9b\u57fa\u672c\u7684 TypeScript \u4ee3\u7801\uff1a<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-ts\" data-lang=\"TypeScript\"><code>let message: string = \"Hello, World!\";\r\nfunction greeting () {\r\nconsole.log(message);\r\n}\r\ngreeting();<\/code><\/pre>\n<\/div>\n<p>\u8bf7\u6ce8\u610f\uff0c\u867d\u7136\u8bed\u6cd5\u4e0e JavaScript \u975e\u5e38\u76f8\u4f3c\uff0c\u4f46\u6b64\u793a\u4f8b\u4e2d\u53ef\u89c1\u4e00\u4e9b\u4e0d\u540c\u4e4b\u5904\uff1amessage \u53d8\u91cf\u540e\u9762\u8ddf\u7740\u4e00\u4e2a\u5192\u53f7 (:)\uff0c\u5e76\u4e14\u5b83\u7684\u7c7b\u578b\uff08\u5728\u672c\u4f8b\u4e2d\u4e3a TypeScript\uff09\u5141\u8bb8\u6211\u4eec\u6307\u5b9a message \u5fc5\u987b\u662f\u5b57\u7b26\u4e32\uff0c\u800c\u4e0d\u80fd\u63a5\u53d7\u5176\u4ed6\u7c7b\u578b\u7684\u503c\u3002.<\/p>\n<h2 id=\"%d9%88%db%8c%da%98%da%af%db%8c-%d9%87%d8%a7-%d9%88-%d9%85%d8%b2%d8%a7%db%8c%d8%a7%db%8c-%d8%a8%d8%b1%d8%aa%d8%b1-typescript-%d8%a8%d8%b1%d8%a7%db%8c-%d8%aa%d9%88%d8%b3%d8%b9%d9%87-%d8%af%d9%87%d9%86\">TypeScript \u5bf9\u5f00\u53d1\u8005\u7684\u4e3b\u8981\u7279\u6027\u548c\u4f18\u52bf<\/h2>\n<p>TypeScript\u4e4b\u6240\u4ee5\u5f97\u540d\uff0c\u662f\u56e0\u4e3a\u5b83\u7684\u4e3b\u8981\u7279\u6027\u662f\u4e3aJavaScript\u5f15\u5165\u4e86\u7c7b\u578b\u5b89\u5168\u3002\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0cmessage\u53d8\u91cf\u88ab\u5b9a\u4e49\u4e3a\u5b57\u7b26\u4e32\u7c7b\u578b\uff0c\u56e0\u6b64\u4e0d\u80fd\u4f7f\u7528\u6570\u503c\u6216\u5176\u4ed6\u4efb\u4f55\u7c7b\u578b\u3002\u8fd9\u770b\u4f3c\u9650\u5236\u6027\u5f88\u5f3a\uff0c\u4f46\u5b9e\u9645\u4e0a\u5bf9\u5f00\u53d1\u8005\u6765\u8bf4\u662f\u6709\u76ca\u7684\u3002.<\/p>\n<h2 id=\"%d8%a7%db%8c%d9%85%d9%86%db%8c-%d8%aa%d8%a7%db%8c%d9%be-%d9%88-%d8%a8%d8%b1%d8%b1%d8%b3%db%8c-%d9%87%d8%a7%db%8c-%d8%b2%d9%85%d8%a7%d9%86-%da%a9%d8%a7%d9%85%d9%be%d8%a7%db%8c%d9%84%d8%8c-%d8%b1%d8%a7\">\u7c7b\u578b\u5b89\u5168\u548c\u7f16\u8bd1\u65f6\u68c0\u67e5\u53ef\u4ee5\u51cf\u5c11\u7f16\u7a0b\u9519\u8bef<\/h2>\n<p>\u8bbe\u60f3\u4ee5\u4e0b\u573a\u666f\uff1a\u4f60\u4ece\u4e24\u4e2a HTML \u6587\u672c\u8f93\u5165\u6846\u4e2d\u83b7\u53d6\u503c\uff0c\u5e76\u60f3\u5c06\u5b83\u4eec\u76f8\u52a0\u3002JavaScript \u4f1a\u5c06\u8fd9\u4e9b\u503c\u8bfb\u53d6\u4e3a\u5b57\u7b26\u4e32\uff08\u6bd5\u7adf\u8fd9\u662f\u4e00\u4e2a\u6587\u672c\u6846\uff01\uff09\u3002\u6700\u7ec8\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-ts\" data-lang=\"TypeScript\"><code>let a = \"2\"; \/\/ Assuming the value has been read from a text input\r\nlet b = \"5\";\r\nconsole.log(a + b); \/\/ Result is \"25\"<\/code><\/pre>\n<\/div>\n<p>\u8fd9\u6bb5\u4ee3\u7801\u8fd0\u884c\u6ca1\u6709\u4efb\u4f55\u8b66\u544a\u6216\u9519\u8bef\uff0c\u6587\u672c\u6846\u4e2d\u7684\u503c\u88ab\u89c6\u4e3a\u5b57\u7b26\u4e32\uff0c\u8fd9\u610f\u5473\u7740\u5b83\u4eec\u4e0d\u662f\u901a\u8fc7\u7b97\u672f\u8fd0\u7b97\u76f8\u52a0\uff0c\u800c\u662f\u88ab\u8fde\u63a5\u8d77\u6765\uff0c\u5bfc\u81f4\u7ed3\u679c\u4e3a\u00ab25\u00bb\u800c\u4e0d\u662f7\u3002\u5982\u679c\u4f60\u6b63\u5728\u5f00\u53d1\u4e00\u6b3e\u5546\u4e1a\u5de5\u5177\uff0c\u5e76\u4e14\u60f3\u8981\u8ba1\u7b97\u4e00\u4e9b\u8d27\u5e01\u4ef7\u503c\uff0c\u8fd9\u53ef\u80fd\u4f1a\u975e\u5e38\u7cdf\u7cd5\u2014\u2014\u4f60\u4f1a\u5411\u5ba2\u6237\u6536\u53d6\u8fc7\u9ad8\u7684\u8d39\u7528\uff01<\/p>\n<p>\u8fd9\u8bf4\u660e\u4e86\u7c7b\u578b\u5b89\u5168\u7684\u91cd\u8981\u6027\u3002\u4e0b\u9762\uff0c\u901a\u8fc7\u7ed9\u53d8\u91cf\u6dfb\u52a0\u7c7b\u578b\u6765\u5e94\u7528\u53d8\u91cf\u7684\u7c7b\u578b\uff1a<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-ts\" data-lang=\"TypeScript\"><code>let a: number = \"2\";\r\nlet b: number = \"2\";\r\nconsole.log(a + b);<\/code><\/pre>\n<\/div>\n<p>\u5982\u679c\u4f60\u5c1d\u8bd5\u7f16\u8bd1\u5e76\u8fd0\u884c\u8fd9\u6bb5\u4ee3\u7801\uff0c\u5b83\u5c06\u65e0\u6cd5\u6b63\u5e38\u5de5\u4f5c\u2014\u2014\u4f60\u4f1a\u6536\u5230\u4e00\u4e2a\u9519\u8bef\uff1a<\/p>\n<p class=\"typography_paragraph01__q_o85\"><code>\u7c7b\u578b'string'\u4e0d\u80fd\u5206\u914d\u7ed9\u7c7b\u578b'number'\u3002.<\/code><\/p>\n<p>\u8fd9\u8868\u793a\u60a8\u9519\u8bef\u5730\u5c06\u5b57\u7b26\u4e32\u503c\u8d4b\u7ed9\u4e86\u6570\u503c\u53d8\u91cf\uff0c\u60a8\u53ef\u4ee5\u8fdb\u884c\u4fee\u6b63\u2014\u2014\u4f8b\u5982\uff0c\u5c06\u5b57\u7b26\u4e32\u663e\u5f0f\u8f6c\u6362\u4e3a\u6570\u5b57\u3002TypeScript \u901a\u8fc7\u5728\u4ee3\u7801\u4e2d\u5b58\u5728\u62fc\u5199\u9519\u8bef\u65f6\u963b\u6b62\u4ee3\u7801\u7f16\u8bd1\u548c\u8fd0\u884c\uff0c\u4f7f\u7a0b\u5e8f\u8c03\u8bd5\u66f4\u52a0\u8f7b\u677e\u53ef\u9760\u3002.<\/p>\n<p>\u5728 TypeScript \u4e2d\uff0c\u4f60\u4e0d\u9700\u8981\u6307\u5b9a\u53d8\u91cf\u7684\u7c7b\u578b\uff08\u5c3d\u7ba1\u901a\u5e38\u5e94\u8be5\u8fd9\u6837\u505a\uff09\uff1a\u7c7b\u578b\u63a8\u65ad\u5141\u8bb8\u4f60\u58f0\u660e\u548c\u4f7f\u7528\u53d8\u91cf\u800c\u65e0\u9700\u6307\u5b9a\u7c7b\u578b\uff0cTypeScript \u4f1a\u6839\u636e\u53d8\u91cf\u7684\u503c\u548c\u7528\u6cd5\u63a8\u65ad\u5176\u7c7b\u578b\u3002\u8fd9\u5728\u5c06\u672a\u6307\u5b9a\u7c7b\u578b\u7684 JavaScript \u4ee3\u7801\u5bfc\u5165 TypeScript \u9879\u76ee\u65f6\u975e\u5e38\u6709\u7528\u3002.<\/p>\n<p>\u5982\u679c\u4f60\u60f3\u4eb2\u81ea\u4f53\u9a8c\u4e00\u4e0b\uff0cTypeScript Playground \u5141\u8bb8\u4f60\u76f4\u63a5\u5728\u6d4f\u89c8\u5668\u4e2d\u7f16\u5199\u548c\u6d4b\u8bd5 TypeScript \u4ee3\u7801\uff0c\u800c\u65e0\u9700\u7f16\u8bd1\u3002.<\/p>\n<h2 id=\"%d8%a7%d9%86%d9%88%d8%a7%d8%b9%d8%8c-%da%a9%d9%84%d8%a7%d8%b3%d9%87%d8%a7-%d9%88-%d8%b1%d8%a7%d8%a8%d8%b7%d9%87%d8%a7%db%8c-%d8%b3%d9%81%d8%a7%d8%b1%d8%b4%db%8c-%d8%af%d8%a7%d8%af\">\u81ea\u5b9a\u4e49\u7c7b\u578b\u3001\u7c7b\u548c\u63a5\u53e3\u53ef\u786e\u4fdd\u6570\u636e\u4e00\u81f4\u6027\u3002<\/h2>\n<p>TypeScript \u6269\u5c55\u4e86 JavaScript \u5bf9\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u652f\u6301\uff0c\u5b83\u4e0d\u4ec5\u652f\u6301\u81ea\u5b9a\u4e49\u7c7b\u578b\uff0c\u8fd8\u6539\u8fdb\u4e86\u7c7b\u3001\u63a5\u53e3\u548c\u7ee7\u627f\u3002.<\/p>\n<p>\u6784\u5efa\u81ea\u5df1\u7684\u5bf9\u8c61\u7c7b\u578b\u548c\u63a5\u53e3\uff0c\u53ef\u4ee5\u8ba9\u4f60\u5728 TypeScript \u4e2d\u5bf9\u6570\u636e\u8fdb\u884c\u5efa\u6a21\uff0c\u4ece\u800c\u786e\u4fdd\u6570\u636e\u5f97\u5230\u6b63\u786e\u7684\u5904\u7406\u548c\u5b58\u50a8\u3002.<\/p>\n<p>\u7c7b\u548c\u7ee7\u627f\u80fd\u591f\u5b9e\u73b0\u7b80\u6d01\u7684\u4ee3\u7801\u548c DRY \u539f\u5219\uff0c\u4f7f\u4f60\u7684\u4ee3\u7801\u5e93\u6bd4\u4f20\u7edf\u7684 JavaScript \u66f4\u6709\u6761\u7406\u3002.<\/p>\n<h2 id=\"enums-%d9%88-%d8%a7%d9%86%d9%88%d8%a7%d8%b9-%d8%aa%d8%ad%d8%aa-%d8%a7%d9%84%d9%84%d9%81%d8%b8%db%8c-%d8%af%d8%b1%da%a9-%da%a9%d8%af-%d8%b4%d9%85%d8%a7-%d8%b1%d8%a7-%d8%a2%d8%b3%d8%a7%d9%86-%d8%aa\">\u679a\u4e3e\u548c\u5b57\u9762\u7c7b\u578b\u4f7f\u4f60\u7684\u4ee3\u7801\u66f4\u5bb9\u6613\u7406\u89e3<\/h2>\n<p>\u679a\u4e3e\u901a\u8fc7\u547d\u540d\u90a3\u4e9b\u539f\u672c\u53ef\u80fd\u542b\u4e49\u6a21\u7cca\u7684\u503c\uff0c\u4f7f\u4f60\u7684\u4ee3\u7801\u66f4\u6613\u8bfb\u3001\u66f4\u65b9\u4fbf\u3002.<\/p>\n<p>\u4f8b\u5982\uff0c\u5047\u8bbe\u4e3a\u4e86\u8282\u7701\u7a7a\u95f4\u5e76\u52a0\u5feb\u641c\u7d22\u901f\u5ea6\uff0c\u60a8\u5c06\u8ba2\u5355\u72b6\u6001\u4ee5\u6570\u503c\u5f62\u5f0f\u5b58\u50a8\u5728\u6570\u636e\u5e93\u4e2d\u3002\u60a8\u4e0d\u4f1a\u4f7f\u7528\u00ab\u5f85\u5904\u7406\u00bb\u3001\u00ab\u5df2\u4ed8\u6b3e\u00bb\u548c\u00ab\u5df2\u53d1\u8d27\u00bb\u8fd9\u51e0\u4e2a\u8bcd\uff0c\u800c\u662f\u5206\u522b\u7528\u6570\u5b57 0\u30011 \u548c 2 \u6765\u5b58\u50a8\u8fd9\u4e9b\u503c\u3002.<\/p>\n<p>\u8fd9\u6837\u505a\u7684\u526f\u4f5c\u7528\u662f\uff0c\u4f60\u7684\u4ee3\u7801\u4f1a\u53d8\u5f97\u6df7\u4e71\uff0c\u56e0\u4e3a\u6570\u5b57\u672c\u8eab\u5e76\u6ca1\u6709\u63d0\u4f9b\u592a\u591a\u4fe1\u606f\u3002\u4f60\u53ef\u80fd\u4f1a\u5fd8\u8bb0\u54ea\u4e2a\u6570\u5b57\u5bf9\u5e94\u54ea\u4e2a\u6761\u4ef6\uff0c\u4ece\u800c\u4f7f\u7528\u9519\u8bef\u7684\u6570\u5b57\u3002\u679a\u4e3e\u63d0\u4f9b\u4e86\u4e00\u4e2a\u4fbf\u6377\u7684\u89e3\u51b3\u65b9\u6848\uff1a<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-ts\" data-lang=\"TypeScript\"><code>enum OrderStatus {\r\npending,\r\npaid,\r\nshipped,\r\n}<\/code><\/pre>\n<\/div>\n<p>\u5728\u4e0a\u9762\u7684\u5217\u8868\u4e2d\uff0c\u201cpending\u201d\u7684\u503c\u4e3a0\uff08\u679a\u4e3e\u548c\u5176\u4ed6\u7f16\u7a0b\u7d22\u5f15\u4e00\u6837\uff0c\u4ece\u96f6\u5f00\u59cb\u8ba1\u6570\uff09\uff0c\u201cpaid\u201d\u7684\u503c\u4e3a1\uff0c\u201csent\u201d\u7684\u503c\u4e3a2\u3002\u4f7f\u7528\u679a\u4e3e\u65f6\uff0c\u901a\u8fc7\u540d\u79f0\u5f15\u7528\u5176\u503c\uff0c\u5e76\u8fd4\u56de\u7d22\u5f15\u503c\uff1a<\/p>\n<p class=\"typography_paragraph01__q_o85\"><code>console.log(OrderStatus.paid);<span>\u00a0<\/span><\/code><code><i>\/\/ \u5c06\u8f93\u51fa 1<\/i><\/code><\/p>\n<p>\u5b57\u9762\u7c7b\u578b\u548c\u8054\u5408\u7c7b\u578b\u4e3a\u53d8\u91cf\u5206\u914d\u7279\u5b9a\u503c\u3002\u4f8b\u5982\uff0c\u4f60\u53ef\u80fd\u6709\u4e00\u4e2a\u51fd\u6570\uff0c\u5b83\u53ea\u671f\u671b\u63a5\u6536\u503c\u201ccat\u201d\u6216\u201cdog\u201d\uff1a<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-ts\" data-lang=\"TypeScript\"><code>function myFunction(pet: \"cat\" | \"dog\") {\r\nconsole.log(pet);\r\n}<\/code><\/pre>\n<\/div>\n<p>\u5982\u679c\u4f60\u7684\u4ee3\u7801\u5411\u6b64\u51fd\u6570\u4f20\u9012\u4e86\u9664\u201ccat\u201d\u6216\u201cdog\u201d\u4e4b\u5916\u7684\u503c\uff0c\u5c06\u4f1a\u5f15\u53d1\u9519\u8bef\u3002\u8fd9\u6709\u52a9\u4e8e\u5728\u5f00\u53d1\u8fc7\u7a0b\u4e2d\u53d1\u73b0\u66f4\u591a\u95ee\u9898\uff1a\u4f60\u53ef\u4ee5\u7f16\u5199\u9700\u8981\u7279\u5b9a\u8f93\u5165\u7684\u51fd\u6570\uff0c\u56e0\u4e3a\u4f60\u77e5\u9053\uff0c\u5982\u679c\u5f15\u5165\u4e86\u9519\u8bef\u5bfc\u81f4\u51fd\u6570\u63a5\u6536\u5230\u610f\u5916\u503c\uff0c\u7a0b\u5e8f\u5c06\u65e0\u6cd5\u7f16\u8bd1\u3002.<\/p>\n<h2 id=\"%d9%86%d8%ad%d9%88%d9%87-%d9%86%d8%b5%d8%a8-typescript-%d9%88-%d8%a7%d8%b3%d8%aa%d9%81%d8%a7%d8%af%d9%87-%d8%a7%d8%b2-%da%a9%d8%a7%d9%85%d9%be%d8%a7%db%8c%d9%84%d8%b1-typescript\">\u5982\u4f55\u5b89\u88c5 TypeScript \u5e76\u4f7f\u7528 TypeScript \u7f16\u8bd1\u5668<\/h2>\n<p>TypeScript \u4ee3\u7801\u9700\u8981\u7f16\u8bd1\u6210 JavaScript \u624d\u80fd\u5728 Web \u6d4f\u89c8\u5668\u548c Node.js \u4e2d\u8fd0\u884c\uff0c\u4e3a\u6b64\u60a8\u9700\u8981\u5b89\u88c5 TypeScript \u7f16\u8bd1\u5668\u3002.<\/p>\n<p>\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b npm \u547d\u4ee4\u5168\u5c40\u5b89\u88c5 TypeScript\u3002.<\/p>\n<p class=\"typography_paragraph01__q_o85\"><code>npm install -g typescript<\/code><\/p>\n<p>\u5b89\u88c5\u5b8c\u6210\u540e\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 npx \u4ece\u7ec8\u7aef\u4e2d\u7684\u4efb\u4f55\u4f4d\u7f6e\u8fd0\u884c tsc TypeScript \u7f16\u8bd1\u547d\u4ee4\uff1a<\/p>\n<p class=\"typography_paragraph01__q_o85\"><code>tsc index.ts<\/code><\/p>\n<p>\u4e0a\u8ff0\u547d\u4ee4\u7f16\u8bd1 TypeScript \u6587\u4ef6 index.ts\uff0c\u5e76\u8f93\u51fa\u540d\u4e3a index.js \u7684\u5df2\u7f16\u8bd1 JavaScript \u6587\u4ef6\u3002.<\/p>\n<h2 id=\"%d9%86%d8%ad%d9%88%d9%87-%d9%86%d9%88%d8%b4%d8%aa%d9%86-%d8%a8%d8%b1%d9%86%d8%a7%d9%85%d9%87-%d8%af%d8%b1-typescript\">\u5982\u4f55\u4f7f\u7528 TypeScript \u7f16\u5199\u7a0b\u5e8f<\/h2>\n<p>TypeScript \u5728\u6784\u5efa\u590d\u6742\u7684\u591a\u9875\u9762\u5e94\u7528\u7a0b\u5e8f\u548c\u7f51\u7ad9\u65f6\u8868\u73b0\u51fa\u8272\u3002\u5927\u591a\u6570\u5f00\u53d1\u8005\u4e0d\u4f1a\u7528\u5b83\u6765\u505a\u8bf8\u5982\u4e3a\u5355\u4e2a\u7f51\u9875\u6dfb\u52a0\u4ea4\u4e92\u6027\u4e4b\u7c7b\u7684\u57fa\u7840\u5de5\u4f5c\uff0c\u4f46\u4ed6\u4eec\u4f1a\u7528\u5b83\u6765\u6784\u5efa\u57fa\u4e8e React \u6216 Angular \u7684\u5927\u578b\u5e94\u7528\u7a0b\u5e8f\u3002.<\/p>\n<p>\u8bb8\u591a\u5f00\u53d1\u8005\u4f7f\u7528\u652f\u6301 TypeScript \u96c6\u6210\u7684\u4ee3\u7801\u7f16\u8f91\u5668\uff0c\u4ee5\u4fbf\u5229\u7528\u4ee3\u7801\u8865\u5168\u3001\u5185\u8054\u6587\u6863\u548c\u9519\u8bef\u9ad8\u4eae\u663e\u793a\u7b49\u529f\u80fd\u6765\u7b80\u5316\u5f00\u53d1\u548c\u8c03\u8bd5\u8fc7\u7a0b\u3002.<\/p>\n<h2 id=\"%d8%a2%db%8c%d8%a7-%d9%85%db%8c-%d8%aa%d9%88%d8%a7%d9%86%d9%85-%d8%a7%d8%b2-%da%a9%d8%af-%d8%ac%d8%a7%d9%88%d8%a7-%d8%a7%d8%b3%da%a9%d8%b1%db%8c%d9%be%d8%aa-%d9%85%d9%88%d8%ac%d9%88%d8%af-%d8%ae%d9%88\">\u6211\u53ef\u4ee5\u4f7f\u7528\u6211\u73b0\u6709\u7684 JavaScript \u4ee3\u7801\u5417\uff1f<\/h2>\n<p>\u662f\u7684\uff01TypeScript \u4e0e JavaScript \u5b8c\u5168\u517c\u5bb9\u3002\u60a8\u53ef\u4ee5\u5bfc\u5165\u4e4b\u524d\u7684 JavaScript \u4ee3\u7801\uff0c\u5e76\u5728 TypeScript \u9879\u76ee\u4e2d\u7ee7\u7eed\u4f7f\u7528\uff0c\u5e76\u968f\u7740\u65f6\u95f4\u7684\u63a8\u79fb\u5bf9\u5176\u8fdb\u884c\u4fee\u6539\uff0c\u4ee5\u5229\u7528 TypeScript \u7684\u65b0\u529f\u80fd\u3002.<\/p>\n<h2 id=\"%d9%be%d8%a7%db%8c%d8%a7%d9%86-%d8%b3%d8%a7%d8%ae%d8%aa-%d8%a8%d8%a7-typescript-%d8%a8%d8%b1%d8%a7%db%8c-%d9%85%d8%b1%d9%88%d8%b1%da%af%d8%b1\">\u4f7f\u7528 TypeScript \u5b8c\u6210\u6d4f\u89c8\u5668\u7aef\u7684\u6784\u5efa<\/h2>\n<p>React \u662f\u4e00\u4e2a\u5e93\uff0c\u53ef\u4ee5\u5e2e\u52a9\u4f60\u4e3a\u524d\u7aef\u5e94\u7528\u7a0b\u5e8f\u521b\u5efa\u7528\u6237\u754c\u9762\u3002\u5b83\u4e3a\u4f60\u6784\u5efa\u53ef\u91cd\u7528\u7ec4\u4ef6\u63d0\u4f9b\u4e86\u57fa\u7840\uff0c\u4f7f\u4f60\u7684\u5e94\u7528\u7a0b\u5e8f\u5f00\u53d1\u66f4\u52a0\u6a21\u5757\u5316\u548c\u7b80\u5355\u3002\u5b83\u8fd8\u5141\u8bb8\u4f60\u521b\u5efa\u52a8\u6001\u9875\u9762\uff0c\u7528\u6237\u53ef\u4ee5\u901a\u8fc7\u663e\u793a\u3001\u9690\u85cf\u3001\u79fb\u52a8\u548c\u66f4\u6539\u9875\u9762\u5185\u5bb9\u7684\u5916\u89c2\u6765\u4e0e\u4e4b\u4ea4\u4e92\u3002React \u5e94\u7528\u7a0b\u5e8f\u53ef\u4ee5\u4f7f\u7528 TypeScript \u7f16\u5199\uff1a\u8fd9\u79cd\u7ec4\u5408\u662f\u524d\u7aef\u5f00\u53d1\u4eba\u5458\u5e38\u7528\u4e14\u5f3a\u5927\u7684\u5de5\u5177\u94fe\u3002.<\/p>\n<p>Angular \u662f\u4e00\u4e2a\u5b8c\u6574\u7684\u6846\u67b6\uff0c\u5b83\u4f7f\u7528 TypeScript \u6784\u5efa\u7ec4\u4ef6\u3002\u5b83\u8d85\u8d8a\u4e86 React\uff1a\u9664\u4e86\u63d0\u4f9b\u6784\u5efa\u7528\u6237\u754c\u9762\u7684\u5de5\u5177\u5916\uff0c\u5b83\u8fd8\u63d0\u4f9b\u4e86\u4e00\u4e2a\u5b8c\u6574\u7684\u5e94\u7528\u7a0b\u5e8f\u6846\u67b6\u3002Angular \u7684\u6982\u5ff5\u65b9\u6cd5\u5141\u8bb8\u5f00\u53d1\u4eba\u5458\u66f4\u5feb\u5730\u6784\u5efa\u5e94\u7528\u7a0b\u5e8f\uff0c\u524d\u63d0\u662f\u4ed6\u4eec\u7684\u5e94\u7528\u7a0b\u5e8f\u6982\u5ff5\u7b26\u5408 Angular \u67b6\u6784\u3002.<\/p>\n<p>React \u548c Angular \u90fd\u53ef\u4ee5\u7528\u6765\u6784\u5efa\u57fa\u4e8e TypeScript \u7684 Ionic \u548c Electron \u5e94\u7528\u3002Ionic \u5141\u8bb8\u4f60\u4f7f\u7528 TypeScript \u6784\u5efa iOS \u548c Android \u79fb\u52a8\u5e94\u7528\uff0c\u800c Electron \u5219\u5141\u8bb8\u4f60\u5c06 Web \u5e94\u7528\u5d4c\u5165\u5230 Windows\u3001Linux \u548c macOS \u7684\u684c\u9762\u5e94\u7528\u4e2d\u3002.<\/p>\n<h2 id=\"%d8%a7%d8%b3%d8%aa%d9%82%d8%b1%d8%a7%d8%b1-backend%d9%87%d8%a7%db%8c-typescript-%d8%af%d8%b1-%d8%b3%d8%b1%d9%88%d8%b1\">\u5728\u670d\u52a1\u5668\u4e0a\u90e8\u7f72 TypeScript \u540e\u7aef<\/h2>\n<p>TypeScript \u4e0d\u4ec5\u9650\u4e8e\u6784\u5efa\u524d\u7aef\u5e94\u7528\u7a0b\u5e8f\uff0c\u5b83\u8fd8\u53ef\u4ee5\u4e0e Node.js \u7ed3\u5408\u4f7f\u7528\uff0c\u5f00\u53d1\u540e\u7aef\u670d\u52a1\u548c\u547d\u4ee4\u884c\u5e94\u7528\u7a0b\u5e8f\u3002.<\/p>\n<p>\u60a8\u8fd8\u53ef\u4ee5\u5c06 TypeScript \u4e0e Fastify Web \u6846\u67b6\u4e00\u8d77\u4f7f\u7528\uff0c\u6216\u8005\u4f7f\u7528\u50cf Nest \u8fd9\u6837\u7684 TypeScript \u4e13\u7528\u6846\u67b6\u6765\u521b\u5efa\u7c7b\u578b\u5b89\u5168\u7684 API\u3002.<\/p>\n<h2 id=\"typescript-%d9%88-graphql\">TypeScript \u548c GraphQL<\/h2>\n<p><a href=\"https:\/\/cdn.itpiran.net\/2025\/01\/15012317\/1-2.jpg\"><img  loading=\"lazy\"  decoding=\"async\"  src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABAQMAAAAl21bKAAAAA1BMVEUAAP+KeNJXAAAAAXRSTlMAQObYZgAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAApJREFUCNdjYAAAAAIAAeIhvDMAAAAASUVORK5CYII=\"  alt=\"\"  width=\"1200\"  height=\"675\"  class=\"aligncenter wp-image-16644 size-full pk-lazyload\"  data-pk-sizes=\"auto\"  data-ls-sizes=\"auto, (max-width: 1200px) 100vw, 1200px\"  data-pk-src=\"https:\/\/cdn.itpiran.net\/2025\/01\/15012317\/1-2.jpg\"  data-pk-srcset=\"https:\/\/cdn.itpiran.net\/2025\/01\/15012317\/1-2.jpg 1200w, https:\/\/cdn.itpiran.net\/2025\/01\/15012317\/1-2-300x169.jpg 300w, https:\/\/cdn.itpiran.net\/2025\/01\/15012317\/1-2-1024x576.jpg 1024w, https:\/\/cdn.itpiran.net\/2025\/01\/15012317\/1-2-768x432.jpg 768w, https:\/\/cdn.itpiran.net\/2025\/01\/15012317\/1-2-110x62.jpg 110w, https:\/\/cdn.itpiran.net\/2025\/01\/15012317\/1-2-200x113.jpg 200w, 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