{"id":4816,"date":"2023-01-05T10:32:12","date_gmt":"2023-01-05T02:32:12","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=4816"},"modified":"2023-01-05T10:32:12","modified_gmt":"2023-01-05T02:32:12","slug":"%e4%ba%86%e8%a7%a3typescript%e4%b8%ad%e7%9a%84%e9%97%ad%e5%8c%85closure%e5%8a%9f%e8%83%bd","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/typescript\/%e4%ba%86%e8%a7%a3typescript%e4%b8%ad%e7%9a%84%e9%97%ad%e5%8c%85closure%e5%8a%9f%e8%83%bd\/","title":{"rendered":"\u4e86\u89e3TypeScript\u4e2d\u7684\u95ed\u5305(Closure)\u529f\u80fd"},"content":{"rendered":"

<\/p>\n

TypeScript \u95ed\u5305(Closure) \u4ecb\u7d39<\/h1>\n

TypeScript \u95ed\u5305\uff08Closure\uff09\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u51fd\u6570\uff0c\u5b83\u53ef\u4ee5\u8bbf\u95ee\u53e6\u4e00\u4e2a\u51fd\u6570\u4f5c\u7528\u57df\u4e2d\u7684\u53d8\u91cf\u3002\u5b83\u53ef\u4ee5\u8ba9\u4f60\u5728\u4e0d\u540c\u7684\u51fd\u6570\u4e2d\u5171\u4eab\u53d8\u91cf\uff0c\u800c\u4e0d\u4f1a\u6c61\u67d3\u5168\u5c40\u4f5c\u7528\u57df\u3002<\/p>\n

TypeScript \u95ed\u5305\u7684\u4e00\u4e2a\u91cd\u8981\u7279\u6027\u662f\u5b83\u53ef\u4ee5\u8bbf\u95ee\u5916\u90e8\u51fd\u6570\u4f5c\u7528\u57df\u4e2d\u7684\u53d8\u91cf\uff0c\u5373\u4f7f\u5916\u90e8\u51fd\u6570\u5df2\u7ecf\u6267\u884c\u5b8c\u6bd5\u3002\u8fd9\u610f\u5473\u7740\uff0c\u95ed\u5305\u53ef\u4ee5\u5728\u5916\u90e8\u51fd\u6570\u6267\u884c\u5b8c\u6bd5\u540e\u4ecd\u7136\u8bbf\u95ee\u5916\u90e8\u51fd\u6570\u4f5c\u7528\u57df\u4e2d\u7684\u53d8\u91cf\u3002<\/p>\n

\u4e0b\u9762\u662f\u4e00\u4e2a\u7b80\u5355\u7684 TypeScript \u95ed\u5305\u793a\u4f8b\uff1a<\/p>\n

\nfunction outerFunction(arg) {\n  let variableInOuterFunction = arg;\n\n  function innerFunction() {\n    console.log(variableInOuterFunction);\n  }\n  innerFunction();\n}\nouterFunction(\"Hello Closure!\");\n<\/pre>\n
\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2a\u5916\u90e8\u51fd\u6570 outerFunction\uff0c\u5b83\u63a5\u53d7\u4e00\u4e2a\u53c2\u6570 arg\u3002\u7136\u540e\uff0c\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2a\u5185\u90e8\u51fd\u6570 innerFunction\uff0c\u5b83\u53ef\u4ee5\u8bbf\u95ee\u5916\u90e8\u51fd\u6570\u4f5c\u7528\u57df\u4e2d\u7684\u53d8\u91cf variableInOuterFunction\u3002<\/p>\n
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\u56e0\u6b64\uff0c\u5f53\u6211\u4eec\u8c03\u7528 outerFunction \u65f6\uff0c\u5b83\u4f1a\u6253\u5370\u51fa\u53c2\u6570 arg \u7684\u503c\uff0c\u5373 “Hello Closure!”\u3002<\/p>\n
TypeScript \u95ed\u5305\u7684\u53e6\u4e00\u4e2a\u91cd\u8981\u7279\u6027\u662f\u5b83\u53ef\u4ee5\u8bbf\u95ee\u5916\u90e8\u51fd\u6570\u4f5c\u7528\u57df\u4e2d\u7684\u53d8\u91cf\uff0c\u5373\u4f7f\u5916\u90e8\u51fd\u6570\u5df2\u7ecf\u6267\u884c\u5b8c\u6bd5\u3002\u8fd9\u610f\u5473\u7740\uff0c\u95ed\u5305\u53ef\u4ee5\u5728\u5916\u90e8\u51fd\u6570\u6267\u884c\u5b8c\u6bd5\u540e\u4ecd\u7136\u8bbf\u95ee\u5916\u90e8\u51fd\u6570\u4f5c\u7528\u57df\u4e2d\u7684\u53d8\u91cf\u3002<\/p>\n
\u4e0b\u9762\u662f\u4e00\u4e2a\u66f4\u590d\u6742\u7684 TypeScript \u95ed\u5305\u793a\u4f8b\uff1a<\/p>\n
\nfunction outerFunction(arg) {\n  let variableInOuterFunction = arg;\n\n  return function innerFunction() {\n    console.log(variableInOuterFunction);\n  }\n}\nlet innerFunction = outerFunction(\"Hello Closure!\");\ninnerFunction();\n<\/pre>\n
\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2a\u5916\u90e8\u51fd\u6570 outerFunction\uff0c\u5b83\u63a5\u53d7\u4e00\u4e2a\u53c2\u6570 arg\u3002\u7136\u540e\uff0c\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2a\u5185\u90e8\u51fd\u6570 innerFunction\uff0c\u5b83\u53ef\u4ee5\u8bbf\u95ee\u5916\u90e8\u51fd\u6570\u4f5c\u7528\u57df\u4e2d\u7684\u53d8\u91cf variableInOuterFunction\u3002<\/p>\n
\u5f53\u6211\u4eec\u8c03\u7528 outerFunction \u65f6\uff0c\u5b83\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u4f5c\u7528\u57df\uff0c\u5e76\u5c06\u53c2\u6570 arg \u7684\u503c\u8d4b\u7ed9\u53d8\u91cf variableInOuterFunction\u3002\u7136\u540e\uff0c\u5b83\u4f1a\u8fd4\u56de\u5185\u90e8\u51fd\u6570 innerFunction\uff0c\u5b83\u53ef\u4ee5\u8bbf\u95ee\u5916\u90e8\u51fd\u6570\u4f5c\u7528\u57df\u4e2d\u7684\u53d8\u91cf variableInOuterFunction\u3002<\/p>\n
\u56e0\u6b64\uff0c\u5f53\u6211\u4eec\u8c03\u7528 outerFunction \u65f6\uff0c\u5b83\u4f1a\u8fd4\u56de\u4e00\u4e2a\u51fd\u6570\uff0c\u8be5\u51fd\u6570\u53ef\u4ee5\u8bbf\u95ee\u5916\u90e8\u51fd\u6570\u4f5c\u7528\u57df\u4e2d\u7684\u53d8\u91cf\u3002\u6211\u4eec\u53ef\u4ee5\u5c06\u8fd4\u56de\u7684\u51fd\u6570\u8d4b\u503c\u7ed9\u53d8\u91cf innerFunction\uff0c\u7136\u540e\u8c03\u7528\u5b83\uff0c\u5b83\u4f1a\u6253\u5370\u51fa\u53c2\u6570 arg \u7684\u503c\uff0c\u5373 “Hello Closure!”\u3002<\/p>\n
\u603b\u4e4b\uff0cTypeScript \u95ed\u5305\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u51fd\u6570\uff0c\u5b83\u53ef\u4ee5\u8bbf\u95ee\u53e6\u4e00\u4e2a\u51fd\u6570\u4f5c\u7528\u57df\u4e2d\u7684\u53d8\u91cf\uff0c\u800c\u4e0d\u4f1a\u6c61\u67d3\u5168\u5c40\u4f5c\u7528\u57df\u3002\u5b83\u53ef\u4ee5\u8ba9\u4f60\u5728\u4e0d\u540c\u7684\u51fd\u6570\u4e2d\u5171\u4eab\u53d8\u91cf\uff0c\u800c\u4e0d\u4f1a\u6c61\u67d3\u5168\u5c40\u4f5c\u7528\u57df\u3002\u5b83\u8fd8\u53ef\u4ee5\u8ba9\u4f60\u5728\u5916\u90e8\u51fd\u6570\u6267\u884c\u5b8c\u6bd5\u540e\u4ecd\u7136\u8bbf\u95ee\u5916\u90e8\u51fd\u6570\u4f5c\u7528\u57df\u4e2d\u7684\u53d8\u91cf\u3002<\/p>\n
<\/p>\n
TypeScript \u95ed\u5305\u7684\u4f18\u70b9<\/h2>\n
TypeScript \u95ed\u5305\u6709\u8bb8\u591a\u4f18\u70b9\uff0c\u5176\u4e2d\u6700\u91cd\u8981\u7684\u662f\uff1a<\/p>\n
    \n
  • \u53ef\u4ee5\u8ba9\u4f60\u5728\u4e0d\u540c\u7684\u51fd\u6570\u4e2d\u5171\u4eab\u53d8\u91cf\uff0c\u800c\u4e0d\u4f1a\u6c61\u67d3\u5168\u5c40\u4f5c\u7528\u57df\u3002<\/strong> \u8fd9\u610f\u5473\u7740\uff0c\u4f60\u53ef\u4ee5\u5728\u4e0d\u540c\u7684\u51fd\u6570\u4e2d\u4f7f\u7528\u76f8\u540c\u7684\u53d8\u91cf\u540d\uff0c\u800c\u4e0d\u4f1a\u5f15\u8d77\u6df7\u6dc6\u3002<\/li>\n
  • \u53ef\u4ee5\u5728\u5916\u90e8\u51fd\u6570\u6267\u884c\u5b8c\u6bd5\u540e\u4ecd\u7136\u8bbf\u95ee\u5916\u90e8\u51fd\u6570\u4f5c\u7528\u57df\u4e2d\u7684\u53d8\u91cf\u3002<\/strong> \u8fd9\u610f\u5473\u7740\uff0c\u4f60\u53ef\u4ee5\u5728\u5916\u90e8\u51fd\u6570\u6267\u884c\u5b8c\u6bd5\u540e\u4ecd\u7136\u8bbf\u95ee\u5916\u90e8\u51fd\u6570\u4f5c\u7528\u57df\u4e2d\u7684\u53d8\u91cf\u3002<\/li>\n
  • \u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002<\/strong> \u8fd9\u610f\u5473\u7740\uff0c\u4f60\u53ef\u4ee5\u66f4\u5bb9\u6613\u5730\u7406\u89e3\u4ee3\u7801\uff0c\u5e76\u4e14\u53ef\u4ee5\u66f4\u5bb9\u6613\u5730\u4fee\u6539\u548c\u7ef4\u62a4\u4ee3\u7801\u3002<\/li>\n<\/ul>\n
    \u603b\u7ed3<\/h2>\n
    TypeScript \u95ed\u5305\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u51fd\u6570\uff0c\u5b83\u53ef\u4ee5\u8bbf\u95ee\u53e6\u4e00\u4e2a\u51fd\u6570\u4f5c\u7528\u57df\u4e2d\u7684\u53d8\u91cf\uff0c\u800c\u4e0d\u4f1a\u6c61\u67d3\u5168\u5c40\u4f5c\u7528\u57df\u3002\u5b83\u53ef\u4ee5\u8ba9\u4f60\u5728\u4e0d\u540c\u7684\u51fd\u6570\u4e2d\u5171\u4eab\u53d8\u91cf\uff0c\u800c\u4e0d\u4f1a\u6c61\u67d3\u5168\u5c40\u4f5c\u7528\u57df\u3002\u5b83\u8fd8\u53ef\u4ee5\u8ba9\u4f60\u5728\u5916\u90e8\u51fd\u6570\u6267\u884c\u5b8c\u6bd5\u540e\u4ecd\u7136\u8bbf\u95ee\u5916\u90e8\u51fd\u6570\u4f5c\u7528\u57df\u4e2d\u7684\u53d8\u91cf\u3002TypeScript \u95ed\u5305\u7684\u4f18\u70b9\u5305\u62ec\u53ef\u4ee5\u8ba9\u4f60\u5728\u4e0d\u540c\u7684\u51fd\u6570\u4e2d\u5171\u4eab\u53d8\u91cf\uff0c\u53ef\u4ee5\u5728\u5916\u90e8\u51fd\u6570\u6267\u884c\u5b8c\u6bd5\u540e\u4ecd\u7136\u8bbf\u95ee\u5916\u90e8\u51fd\u6570\u4f5c\u7528\u57df\u4e2d\u7684\u53d8\u91cf\uff0c\u4ee5\u53ca\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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