{"id":4828,"date":"2023-01-05T10:38:32","date_gmt":"2023-01-05T02:38:32","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=4828"},"modified":"2023-01-05T10:38:32","modified_gmt":"2023-01-05T02:38:32","slug":"%e5%ad%b8%e7%bf%92%e5%a6%82%e4%bd%95%e5%88%a9%e7%94%a8typescript%e7%b1%bb%e5%9e%8b%e4%bf%9d%e6%8a%a4%e6%8f%90%e5%8d%87%e7%a8%8b%e5%bc%8f%e7%a2%bc%e5%93%81%e8%b3%aa","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/typescript\/%e5%ad%b8%e7%bf%92%e5%a6%82%e4%bd%95%e5%88%a9%e7%94%a8typescript%e7%b1%bb%e5%9e%8b%e4%bf%9d%e6%8a%a4%e6%8f%90%e5%8d%87%e7%a8%8b%e5%bc%8f%e7%a2%bc%e5%93%81%e8%b3%aa\/","title":{"rendered":"\u5b78\u7fd2\u5982\u4f55\u5229\u7528TypeScript\u7c7b\u578b\u4fdd\u62a4\u63d0\u5347\u7a0b\u5f0f\u78bc\u54c1\u8cea"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"TypeScript, Type Protection\"><\/p>\n<h1>TypeScript \u7c7b\u578b\u4fdd\u62a4(type protection)<\/h1>\n<p>TypeScript \u662f\u4e00\u7a2e\u7531 Microsoft \u958b\u767c\u7684 JavaScript \u7684\u8d85\u96c6\uff0c\u5b83\u63d0\u4f9b\u4e86\u985e\u578b\u6aa2\u67e5\u548c\u7d50\u69cb\u5316\u7a0b\u5f0f\u78bc\u7de8\u5beb\u7684\u529f\u80fd\uff0c\u53ef\u4ee5\u6e1b\u5c11\u7a0b\u5f0f\u78bc\u51fa\u932f\u7684\u6a5f\u6703\uff0c\u4e26\u4e14\u63d0\u9ad8\u7a0b\u5f0f\u78bc\u7684\u53ef\u8b80\u6027\u3002TypeScript \u7684\u7c7b\u578b\u4fdd\u62a4\uff08type protection\uff09\u529f\u80fd\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u5728\u7de8\u5beb\u7a0b\u5f0f\u78bc\u6642\uff0c\u66f4\u52a0\u5b89\u5168\u53ef\u9760\u3002<\/p>\n<p><!--more--><\/p>\n<p>TypeScript \u7684\u7c7b\u578b\u4fdd\u62a4\u529f\u80fd\u53ef\u4ee5\u5728\u7de8\u5beb\u7a0b\u5f0f\u78bc\u6642\uff0c\u6aa2\u67e5\u7a0b\u5f0f\u78bc\u4e2d\u7684\u8b8a\u91cf\u548c\u51fd\u6578\u662f\u5426\u7b26\u5408\u9810\u671f\u7684\u985e\u578b\uff0c\u4ee5\u53ca\u6aa2\u67e5\u51fd\u6578\u7684\u53c3\u6578\u662f\u5426\u7b26\u5408\u9810\u671f\u7684\u985e\u578b\u3002\u9019\u6a23\u53ef\u4ee5\u6709\u6548\u7684\u9632\u6b62\u7a0b\u5f0f\u78bc\u51fa\u932f\uff0c\u63d0\u9ad8\u7a0b\u5f0f\u78bc\u7684\u53ef\u8b80\u6027\u548c\u53ef\u7dad\u8b77\u6027\u3002<\/p>\n<h2>TypeScript \u7c7b\u578b\u4fdd\u62a4\u7684\u57fa\u672c\u7528\u6cd5<\/h2>\n<p>TypeScript \u7684\u7c7b\u578b\u4fdd\u62a4\u529f\u80fd\u53ef\u4ee5\u901a\u904e\u5b9a\u7fa9\u8b8a\u91cf\u548c\u51fd\u6578\u7684\u985e\u578b\u4f86\u5be6\u73fe\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre class=\"brush: typescript\">\nlet myNumber: number = 1;\nlet myString: string = 'Hello World';\n\nfunction add(a: number, b: number): number {\n  return a + b;\n}\n<\/pre>\n<p>\u4e0a\u9762\u7684\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u6211\u5011\u5b9a\u7fa9\u4e86\u4e00\u500b number \u985e\u578b\u7684\u8b8a\u91cf myNumber\uff0c\u4e00\u500b string \u985e\u578b\u7684\u8b8a\u91cf myString\uff0c\u4ee5\u53ca\u4e00\u500b\u63a5\u53d7\u5169\u500b number \u985e\u578b\u53c3\u6578\uff0c\u4e26\u8fd4\u56de\u4e00\u500b number \u985e\u578b\u7d50\u679c\u7684\u51fd\u6578 add\u3002<\/p>\n<p>TypeScript \u7684\u7c7b\u578b\u4fdd\u62a4\u529f\u80fd\u53ef\u4ee5\u5728\u7de8\u8b6f\u6642\u6aa2\u67e5\u7a0b\u5f0f\u78bc\u4e2d\u7684\u8b8a\u91cf\u548c\u51fd\u6578\u662f\u5426\u7b26\u5408\u9810\u671f\u7684\u985e\u578b\uff0c\u5982\u679c\u4e0d\u7b26\u5408\uff0c\u5247\u6703\u5831\u932f\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre class=\"brush: typescript\">\nlet myNumber: number = 1;\nlet myString: string = 'Hello World';\n\nfunction add(a: number, b: number): number {\n  return a + b;\n}\n\nmyNumber = 'Hello World'; \/\/ Error: Type 'string' is not assignable to type 'number'\nadd(1, '2'); \/\/ Error: Argument of type '\"2\"' is not assignable to parameter of type 'number'\n<\/pre>\n<p>\u4e0a\u9762\u7684\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u6211\u5011\u5c07 myNumber \u8b8a\u91cf\u8ce6\u503c\u70ba\u4e00\u500b string \u985e\u578b\u7684\u503c\uff0c\u5c0e\u81f4\u7de8\u8b6f\u6642\u51fa\u73fe\u932f\u8aa4\uff1b\u540c\u6a23\u7684\uff0c\u6211\u5011\u5c07 add \u51fd\u6578\u7684\u53c3\u6578\u8ce6\u503c\u70ba\u4e00\u500b string \u985e\u578b\u7684\u503c\uff0c\u4e5f\u5c0e\u81f4\u7de8\u8b6f\u6642\u51fa\u73fe\u932f\u8aa4\u3002<\/p>\n<p>\u901a\u904e TypeScript \u7684\u7c7b\u578b\u4fdd\u62a4\u529f\u80fd\uff0c\u53ef\u4ee5\u6709\u6548\u7684\u9632\u6b62\u7a0b\u5f0f\u78bc\u51fa\u932f\uff0c\u63d0\u9ad8\u7a0b\u5f0f\u78bc\u7684\u53ef\u8b80\u6027\u548c\u53ef\u7dad\u8b77\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6458\u8981\uff1aTypeScript\u7c7b\u578b\u4fdd\u62a4\u662f\u4e00\u7a2e\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u63d0\u5347\u7a0b\u5f0f\u78bc\u54c1\u8cea\uff0c\u6e1b\u5c11\u932f\u8aa4\uff0c\u63d0\u9ad8\u53ef\u7dad\u8b77\u6027\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u5229\u7528TypeScript\u7c7b\u578b\u4fdd\u62a4\u4f86\u63d0\u5347\u7a0b\u5f0f\u78bc\u54c1\u8cea\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[187],"tags":[186],"class_list":["post-4828","post","type-post","status-publish","format-standard","hentry","category-typescript","tag-typescript"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_shortlink":"https:\/\/wp.me\/pcFK27-1fS","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4828","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/comments?post=4828"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4828\/revisions"}],"predecessor-version":[{"id":4829,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4828\/revisions\/4829"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=4828"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=4828"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=4828"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}