{"id":4914,"date":"2023-01-05T11:17:45","date_gmt":"2023-01-05T03:17:45","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=4914"},"modified":"2023-01-05T11:17:45","modified_gmt":"2023-01-05T03:17:45","slug":"%e5%ad%b8%e7%bf%92%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8typescript%e7%b1%bb%e5%9e%8b%e5%88%ab%e5%90%8dtypealias","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/typescript\/%e5%ad%b8%e7%bf%92%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8typescript%e7%b1%bb%e5%9e%8b%e5%88%ab%e5%90%8dtypealias\/","title":{"rendered":"\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528TypeScript\u7c7b\u578b\u522b\u540d(typealias)"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"TypeScript, TypeScript \u7c7b\u578b\u522b\u540d, TypeScript \u7c7b\u578b\u522b\u540d\u4f7f\u7528\"><\/p>\n<h1>TypeScript \u7c7b\u578b\u522b\u540d\u7684\u4f7f\u7528<\/h1>\n<p>TypeScript \u662f\u4e00\u7a2e\u7531\u5fae\u8edf\u958b\u767c\u7684 JavaScript \u7684\u8d85\u96c6\uff0c\u5b83\u64c1\u6709 JavaScript \u7684\u6240\u6709\u7279\u6027\uff0c\u4e26\u4e14\u64c1\u6709\u985e\u578b\u7cfb\u7d71\uff0c\u53ef\u4ee5\u63d0\u4f9b\u66f4\u591a\u7684\u7a0b\u5f0f\u78bc\u5065\u5168\u6027\u6aa2\u67e5\u3002TypeScript \u7684\u7a0b\u5f0f\u78bc\u6703\u88ab\u7de8\u8b6f\u6210 JavaScript\uff0c\u53ef\u4ee5\u5728\u700f\u89bd\u5668\u4e0a\u57f7\u884c\u3002<\/p>\n<p>TypeScript \u63d0\u4f9b\u4e86\u4e00\u7a2e\u53eb\u505a\u300c\u7c7b\u578b\u522b\u540d(type alias)\u300d\u7684\u529f\u80fd\uff0c\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u5c07\u4e00\u500b\u8907\u96dc\u7684\u578b\u5225\u5b9a\u7fa9\u70ba\u4e00\u500b\u7c21\u55ae\u7684\u540d\u7a31\uff0c\u4ee5\u4fbf\u65bc\u5728\u7a0b\u5f0f\u78bc\u4e2d\u91cd\u8907\u4f7f\u7528\u3002<\/p>\n<p><!--more--><\/p>\n<p>\u7c7b\u578b\u522b\u540d\u53ef\u4ee5\u7528\u65bc\u5b9a\u7fa9\u4efb\u4f55\u985e\u578b\uff0c\u5305\u62ec\u57fa\u672c\u985e\u578b\u3001\u51fd\u6578\u985e\u578b\u3001\u9663\u5217\u985e\u578b\u3001\u7269\u4ef6\u985e\u578b\u7b49\u7b49\u3002<\/p>\n<p>\u8209\u500b\u4f8b\u5b50\uff0c\u5047\u8a2d\u6211\u5011\u60f3\u8981\u5b9a\u7fa9\u4e00\u500b\u51fd\u6578\uff0c\u8a72\u51fd\u6578\u63a5\u53d7\u4e00\u500b\u5b57\u4e32\u53c3\u6578\uff0c\u4e26\u4e14\u8fd4\u56de\u4e00\u500b\u6578\u5b57\uff1a<\/p>\n<pre class=\"brush: typescript\">\nfunction getNumber(str: string): number {\n  return parseInt(str);\n}\n<\/pre>\n<p>\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u7c7b\u578b\u522b\u540d\u4f86\u7c21\u5316\u4e0a\u9762\u7684\u51fd\u6578\u5b9a\u7fa9\uff1a<\/p>\n<pre class=\"brush: typescript\">\ntype StringToNumberFunc = (str: string) => number;\n\nconst getNumber: StringToNumberFunc = (str: string): number => {\n  return parseInt(str);\n};\n<\/pre>\n<p>\u4e0a\u9762\u7684\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u6211\u5011\u4f7f\u7528\u4e86\u7c7b\u578b\u522b\u540d\u4f86\u5b9a\u7fa9\u4e00\u500b\u51fd\u6578\u985e\u578b\uff0c\u4e26\u4e14\u5c07\u8a72\u51fd\u6578\u985e\u578b\u8ce6\u503c\u7d66\u4e86\u4e00\u500b\u51fd\u6578\u3002<\/p>\n<p>\u7c7b\u578b\u522b\u540d\u4e5f\u53ef\u4ee5\u7528\u65bc\u5b9a\u7fa9\u7269\u4ef6\u985e\u578b\uff1a<\/p>\n<pre class=\"brush: typescript\">\ntype User = {\n  name: string;\n  age: number;\n};\n\nconst user: User = {\n  name: 'John',\n  age: 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