{"id":4890,"date":"2023-01-05T11:13:34","date_gmt":"2023-01-05T03:13:34","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=4890"},"modified":"2023-01-05T11:13:34","modified_gmt":"2023-01-05T03:13:34","slug":"%e4%ba%86%e8%a7%a3typescript%e4%b8%ad%e8%81%af%e5%90%88%e9%a1%9e%e5%9e%8b%e7%9a%84%e5%8a%9f%e8%83%bd%e8%88%87%e6%87%89%e7%94%a8","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/typescript\/%e4%ba%86%e8%a7%a3typescript%e4%b8%ad%e8%81%af%e5%90%88%e9%a1%9e%e5%9e%8b%e7%9a%84%e5%8a%9f%e8%83%bd%e8%88%87%e6%87%89%e7%94%a8\/","title":{"rendered":"\u4e86\u89e3TypeScript\u4e2d\u806f\u5408\u985e\u578b\u7684\u529f\u80fd\u8207\u61c9\u7528"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"TypeScript, Union Types\"><\/p>\n<h1>TypeScript \u806f\u5408\u985e\u578b(Union Types)<\/h1>\n<p>TypeScript \u662f\u4e00\u7a2e JavaScript \u7684\u8d85\u96c6\uff0c\u5b83\u63d0\u4f9b\u4e86\u985e\u578b\u7cfb\u7d71\uff0c\u8b93\u958b\u767c\u8005\u53ef\u4ee5\u5728\u7a0b\u5f0f\u78bc\u4e2d\u6307\u5b9a\u8b8a\u6578\u7684\u985e\u578b\uff0c\u4ee5\u63d0\u5347\u7a0b\u5f0f\u78bc\u7684\u53ef\u8b80\u6027\u548c\u53ef\u7dad\u8b77\u6027\u3002\u5176\u4e2d\uff0c\u806f\u5408\u985e\u578b(Union Types)\u662f TypeScript \u4e2d\u4e00\u7a2e\u975e\u5e38\u6709\u7528\u7684\u985e\u578b\uff0c\u5b83\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u6307\u5b9a\u4e00\u500b\u8b8a\u6578\u53ef\u4ee5\u63a5\u53d7\u591a\u7a2e\u985e\u578b\u7684\u503c\u3002<\/p>\n<p><!--more--><\/p>\n<p>\u806f\u5408\u985e\u578b\u7684\u8a9e\u6cd5\u5f88\u7c21\u55ae\uff0c\u53ea\u8981\u5c07\u591a\u7a2e\u985e\u578b\u7528 <span style=\"color: #009900; font-weight: bold;\">&#8220;|&#8221;<\/span> \u7b26\u865f\u9694\u958b\u5373\u53ef\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre class=\"brush: javascript\">\nlet myVariable: string | number;\n<\/pre>\n<p>\u4e0a\u9762\u7684\u7a0b\u5f0f\u78bc\u8868\u793a\uff0cmyVariable \u8b8a\u6578\u53ef\u4ee5\u63a5\u53d7\u5b57\u4e32\u985e\u578b\u6216\u6578\u5b57\u985e\u578b\u7684\u503c\u3002<\/p>\n<p>\u806f\u5408\u985e\u578b\u4e5f\u53ef\u4ee5\u7528\u65bc\u51fd\u5f0f\u7684\u53c3\u6578\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre class=\"brush: javascript\">\nfunction add(a: string | number, b: string | number): string | number {\n    return a + b;\n}\n<\/pre>\n<p>\u4e0a\u9762\u7684\u51fd\u5f0f add() \u63a5\u53d7\u5169\u500b\u53c3\u6578\uff0c\u5169\u500b\u53c3\u6578\u90fd\u53ef\u4ee5\u63a5\u53d7\u5b57\u4e32\u985e\u578b\u6216\u6578\u5b57\u985e\u578b\u7684\u503c\uff0c\u4e26\u4e14\u51fd\u5f0f\u7684\u56de\u50b3\u503c\u4e5f\u53ef\u4ee5\u662f\u5b57\u4e32\u985e\u578b\u6216\u6578\u5b57\u985e\u578b\u3002<\/p>\n<p>\u806f\u5408\u985e\u578b\u4e5f\u53ef\u4ee5\u7528\u65bc\u9663\u5217\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre class=\"brush: javascript\">\nlet myArray: (string | number)[];\n<\/pre>\n<p>\u4e0a\u9762\u7684\u7a0b\u5f0f\u78bc\u8868\u793a\uff0cmyArray \u9663\u5217\u53ef\u4ee5\u63a5\u53d7\u5b57\u4e32\u985e\u578b\u6216\u6578\u5b57\u985e\u578b\u7684\u503c\u3002<\/p>\n<p>\u806f\u5408\u985e\u578b\u4e5f\u53ef\u4ee5\u7528\u65bc\u7269\u4ef6\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre class=\"brush: javascript\">\nlet myObject: {\n    name: string;\n    age: number;\n    gender: string | number;\n};\n<\/pre>\n<p>\u4e0a\u9762\u7684\u7a0b\u5f0f\u78bc\u8868\u793a\uff0cmyObject \u7269\u4ef6\u6709 name \u548c age \u5c6c\u6027\uff0c\u5169\u500b\u5c6c\u6027\u7684\u503c\u5206\u5225\u662f\u5b57\u4e32\u985e\u578b\u548c\u6578\u5b57\u985e\u578b\uff0c\u800c gender \u5c6c\u6027\u7684\u503c\u53ef\u4ee5\u662f\u5b57\u4e32\u985e\u578b\u6216\u6578\u5b57\u985e\u578b\u3002<\/p>\n<p>\u806f\u5408\u985e\u578b\u662f TypeScript \u4e2d\u4e00\u7a2e\u975e\u5e38\u6709\u7528\u7684\u985e\u578b\uff0c\u5b83\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u6307\u5b9a\u4e00\u500b\u8b8a\u6578\u53ef\u4ee5\u63a5\u53d7\u591a\u7a2e\u985e\u578b\u7684\u503c\uff0c\u4ee5\u63d0\u5347\u7a0b\u5f0f\u78bc\u7684\u53ef\u8b80\u6027\u548c\u53ef\u7dad\u8b77\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6458\u8981:TypeScript\u4e2d\u7684\u806f\u5408\u985e\u578b\u662f\u4e00\u7a2e\u53ef\u4ee5\u63a5\u53d7\u591a\u7a2e\u985e\u578b\u7684\u8b8a\u6578\uff0c\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u6709\u5f48\u6027\u5730\u64b0\u5beb\u7a0b\u5f0f\u78bc\uff0c\u672c\u6587\u5c07\u4ecb\u7d39\u806f\u5408\u985e\u578b\u7684\u529f\u80fd\u8207\u61c9\u7528\uff0c\u8b93\u958b\u767c\u8005\u80fd\u5920\u66f4\u6709\u6548\u7387\u5730\u4f7f\u7528TypeScript\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-4890","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\/pcFK27-1gS","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4890","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=4890"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4890\/revisions"}],"predecessor-version":[{"id":4891,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4890\/revisions\/4891"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=4890"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=4890"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=4890"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}