{"id":39035,"date":"2022-07-08T06:53:50","date_gmt":"2023-05-12T07:12:32","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/angular-%e5%85%b3%e4%ba%8e%e5%a4%84%e7%90%86-rxjs-behaviorsubject-%e8%af%bb%e5%8f%96%e9%94%99%e8%af%af%e7%9a%84%e6%96%b9%e6%b3%95%ef%bc%88%e7%96%91%e9%97%ae%ef%bc%89\/"},"modified":"2024-01-15T10:07:56","modified_gmt":"2024-01-15T02:07:56","slug":"angular-%e5%85%b3%e4%ba%8e%e5%a4%84%e7%90%86-rxjs-behaviorsubject-%e8%af%bb%e5%8f%96%e9%94%99%e8%af%af%e7%9a%84%e6%96%b9%e6%b3%95%ef%bc%88%e7%96%91%e9%97%ae%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/angular-%e5%85%b3%e4%ba%8e%e5%a4%84%e7%90%86-rxjs-behaviorsubject-%e8%af%bb%e5%8f%96%e9%94%99%e8%af%af%e7%9a%84%e6%96%b9%e6%b3%95%ef%bc%88%e7%96%91%e9%97%ae%ef%bc%89\/","title":{"rendered":"[Angular] \u5173\u4e8e\u5904\u7406 RxJS BehaviorSubject \u8bfb\u53d6\u9519\u8bef\u7684\u65b9\u6cd5\uff08\u7591\u95ee\uff09"},"content":{"rendered":"<p>\u5173\u4e8e RxJS BehaviorSubject \u7684\u5b9e\u73b0\u65b9\u6cd5<\/p>\n<pre class=\"post-pre\"><code>ERROR Error: Uncaught (in promise): TypeError: \r\nBehaviorSubject_1.BehaviorSubject is not a constructor\r\nTypeError: BehaviorSubject_1.BehaviorSubject is not a constructor\r\n<\/code><\/pre>\n<p>\u8fd9\u4e2a\u8fd0\u884c\u65f6\u9519\u8bef\u6211\u5b9e\u5728\u65e0\u6cd5\u89e3\u51b3\uff0c\u5c3d\u7ba1\u6211\u8fdb\u884c\u4e86\u5927\u91cf\u7684\u8c03\u67e5\u548c\u5c1d\u8bd5\uff0c\u6700\u7ec8\u627e\u5230\u4e86\u4e00\u79cd\u907f\u514d\u7684\u65b9\u6cd5\uff0c\u4f46\u6211\u4e0d\u77e5\u9053\u8fd9\u662f\u5426\u662f\u6b63\u786e\u7684\u5b9e\u65bd\u65b9\u5f0f&#8230;<\/p>\n<p>\u8fd0\u884c\u65f6\u51fa\u73b0\u9519\u8bef<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">Component<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">@angular\/core<\/span><span class=\"dl\">\"<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">BehaviorSubject<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">rxjs\/BehaviorSubject<\/span><span class=\"dl\">\"<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"p\">@<\/span><span class=\"nd\">Component<\/span><span class=\"p\">({<\/span>\r\n  <span class=\"na\">selector<\/span> <span class=\"p\">:<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">my-app<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"na\">template<\/span> <span class=\"p\">:<\/span> <span class=\"s2\">`&lt;h1&gt;Hello World&lt;\/h1&gt;`<\/span><span class=\"p\">,<\/span>\r\n<span class=\"p\">})<\/span>\r\n<span class=\"k\">export<\/span> <span class=\"kd\">class<\/span> <span class=\"nx\">MyAppComponent<\/span>\r\n<span class=\"p\">{<\/span>\r\n  <span class=\"k\">private<\/span> <span class=\"nx\">_isOpen<\/span><span class=\"p\">:<\/span> <span class=\"nx\">BehaviorSubject<\/span><span class=\"o\">&lt;<\/span><span class=\"nx\">boolean<\/span><span class=\"o\">&gt;<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nx\">BehaviorSubject<\/span><span class=\"p\">(<\/span><span class=\"kc\">false<\/span><span class=\"p\">);<\/span>\r\n\r\n  <span class=\"kd\">constructor<\/span><span class=\"p\">()<\/span>\r\n  <span class=\"p\">{<\/span>\r\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nx\">log<\/span><span class=\"p\">(<\/span><span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">_isOpen<\/span><span class=\"p\">);<\/span>\r\n  <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u4e0d\u4f1a\u53d1\u751f\u8fd0\u884c\u65f6\u9519\u8bef\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">Component<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">@angular\/core<\/span><span class=\"dl\">\"<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"o\">*<\/span> <span class=\"k\">as<\/span> <span class=\"nx\">Rx<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">rxjs<\/span><span class=\"dl\">\"<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"p\">@<\/span><span class=\"nd\">Component<\/span><span class=\"p\">({<\/span>\r\n  <span class=\"na\">selector<\/span> <span class=\"p\">:<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">my-app<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"na\">template<\/span> <span class=\"p\">:<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">&lt;h1&gt;Hello World&lt;\/h1&gt;<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span>\r\n<span class=\"p\">})<\/span>\r\n<span class=\"k\">export<\/span> <span class=\"kd\">class<\/span> <span class=\"nx\">MyAppComponent<\/span>\r\n<span class=\"p\">{<\/span>\r\n  <span class=\"k\">private<\/span> <span class=\"nx\">_isOpen<\/span><span class=\"p\">:<\/span> <span class=\"nx\">Rx<\/span><span class=\"p\">.<\/span><span class=\"nx\">BehaviorSubject<\/span><span class=\"o\">&lt;<\/span><span class=\"nx\">boolean<\/span><span class=\"o\">&gt;<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nx\">Rx<\/span><span class=\"p\">.<\/span><span class=\"nx\">BehaviorSubject<\/span><span class=\"p\">(<\/span><span class=\"kc\">false<\/span><span class=\"p\">);<\/span>\r\n\r\n  <span class=\"kd\">constructor<\/span><span class=\"p\">()<\/span>\r\n  <span class=\"p\">{<\/span>\r\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nx\">log<\/span><span class=\"p\">(<\/span><span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">_isOpen<\/span><span class=\"p\">);<\/span>\r\n  <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u7cfb\u7edf\u914d\u7f6e\u6587\u4ef6 system.config.js<\/p>\n<pre class=\"post-pre\"><code><span class=\"err\">\uff08<\/span><span class=\"nx\">\u4e2d\u7565<\/span><span class=\"err\">\uff09<\/span>\r\n  <span class=\"kd\">const<\/span> <span class=\"nx\">map<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"na\">rxjs<\/span> <span class=\"p\">:<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">node_modules\/rxjs<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"p\">}<\/span> <span class=\"k\">as<\/span> <span class=\"p\">{[<\/span><span class=\"na\">key<\/span><span class=\"p\">:<\/span> <span class=\"kr\">string<\/span><span class=\"p\">]:<\/span> <span class=\"kr\">string<\/span><span class=\"p\">};<\/span>\r\n<span class=\"err\">\uff08<\/span><span class=\"nx\">\u4e2d\u7565<\/span><span class=\"err\">\uff09<\/span>\r\n\r\n  <span class=\"kd\">const<\/span> <span class=\"nx\">packages<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"na\">rxjs<\/span> <span class=\"p\">:<\/span> <span class=\"p\">{<\/span> <span class=\"na\">defaultExtension<\/span> <span class=\"p\">:<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">js<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span> <span class=\"na\">main<\/span> <span class=\"p\">:<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">bundles\/Rx.js<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">},<\/span>\r\n  <span class=\"p\">}<\/span> <span class=\"k\">as<\/span> <span class=\"p\">{[<\/span><span class=\"na\">key<\/span><span class=\"p\">:<\/span> <span class=\"kr\">string<\/span><span class=\"p\">]:<\/span> <span class=\"kr\">any<\/span><span class=\"p\">};<\/span>\r\n<span class=\"err\">\uff08<\/span><span class=\"nx\">\u4e2d\u7565<\/span><span class=\"err\">\uff09<\/span>\r\n<\/code><\/pre>\n<p>\u7248\u672c<\/p>\n<pre class=\"post-pre\"><code><span class=\"p\">{<\/span>\r\n    <span class=\"nl\">\"dependencies\"<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"nl\">\"@angular\/animations\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"^4.3.1\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"nl\">\"@angular\/common\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"^4.3.1\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"nl\">\"@angular\/compiler\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"^4.3.1\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"nl\">\"@angular\/compiler-cli\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"^4.3.1\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"nl\">\"@angular\/core\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"^4.3.1\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"nl\">\"@angular\/forms\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"^4.3.1\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"nl\">\"@angular\/http\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"^4.3.1\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"nl\">\"@angular\/platform-browser\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"^4.3.1\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"nl\">\"@angular\/platform-browser-dynamic\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"^4.3.1\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"nl\">\"@angular\/platform-server\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"^4.3.1\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"nl\">\"@angular\/router\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"^4.3.1\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"nl\">\"reflect-metadata\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"^0.1.10\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"nl\">\"rxjs\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"^5.4.2\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"nl\">\"systemjs\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"^0.20.16\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"nl\">\"zone.js\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"^0.8.14\"<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u5173\u4e8e RxJS BehaviorSubject \u7684\u5b9e\u73b0\u65b9\u6cd5 ERROR Error: Uncaught (in [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-39035","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Angular] \u5173\u4e8e\u5904\u7406 RxJS BehaviorSubject \u8bfb\u53d6\u9519\u8bef\u7684\u65b9\u6cd5\uff08\u7591\u95ee\uff09 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/angular-\u5173\u4e8e\u5904\u7406-rxjs-behaviorsubject-\u8bfb\u53d6\u9519\u8bef\u7684\u65b9\u6cd5\uff08\u7591\u95ee\uff09\/\" \/>\n<meta property=\"og:locale\" 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