{"id":39052,"date":"2023-01-08T19:39:43","date_gmt":"2024-01-25T12:23:43","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/angular-%e8%a1%a8%e5%8d%95%ef%bc%882%ef%bc%89%ef%bc%9a%e9%aa%8c%e8%af%81\/"},"modified":"2024-04-29T09:07:51","modified_gmt":"2024-04-29T01:07:51","slug":"angular-%e8%a1%a8%e5%8d%95%ef%bc%882%ef%bc%89%ef%bc%9a%e9%aa%8c%e8%af%81","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/angular-%e8%a1%a8%e5%8d%95%ef%bc%882%ef%bc%89%ef%bc%9a%e9%aa%8c%e8%af%81\/","title":{"rendered":"Angular \u8868\u5355\uff082\uff09\uff1a\u9a8c\u8bc1"},"content":{"rendered":"<h1>\u9a8c\u8bc1<\/h1>\n<p>\u4f7f\u7528\u8868\u5355\u9a8c\u8bc1\u7684\u8bbe\u7f6e\u5982\u4e0b\uff1a<\/p>\n<h5>\u5728app.module.ts\u6587\u4ef6\u4e2d\uff0c\u5bfc\u5165FormsModule\u6a21\u5757\u3002<\/h5>\n<ul class=\"post-ul\">\u30d5\u30a9\u30fc\u30e0\u30e2\u30b8\u30e5\u30fc\u30eb\u3092\u4f7f\u3046\u306b\u306f<\/ul>\n<h5>2. \u6dfb\u52a0\u7ec4\u4ef6TS\u6587\u4ef6\u4e2d\u7684Validators\u7684\u5bfc\u5165\u3002<\/h5>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">FormGroup<\/span><span class=\"p\">,<\/span> <span class=\"nx\">FormBuilder<\/span><span class=\"p\">,<\/span> <span class=\"nx\">Validators<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">@angular\/forms<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<h5>\u5728\u7ec4\u4ef6\u7684TS\u6587\u4ef6\u4e2d\u7684ngOnInit()\u51fd\u6570\u4e2d\u4e3a\u6bcf\u4e2a\u8868\u5355\u63a7\u4ef6\u8bbe\u7f6e\u9a8c\u8bc1\u89c4\u5219\u3002<\/h5>\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=\"nx\">OnInit<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">@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\">FormGroup<\/span><span class=\"p\">,<\/span> <span class=\"nx\">FormBuilder<\/span><span class=\"p\">,<\/span> <span class=\"nx\">Validators<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">@angular\/forms<\/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> <span class=\"nx\">\u7701\u7565<\/span> <span class=\"p\">})<\/span>\r\n<span class=\"k\">export<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">SampleComponent<\/span> <span class=\"k\">implements<\/span> <span class=\"nx\">OnInit<\/span> <span class=\"p\">{<\/span>\r\n\r\n  <span class=\"nx\">title<\/span><span class=\"o\">!<\/span><span class=\"p\">:<\/span><span class=\"kr\">string<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"nx\">message<\/span><span class=\"o\">!<\/span><span class=\"p\">:<\/span><span class=\"kr\">string<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"nx\">sampleForm<\/span><span class=\"o\">!<\/span><span class=\"p\">:<\/span> <span class=\"nx\">FormGroup<\/span><span class=\"p\">;<\/span>\r\n\r\n  <span class=\"nf\">constructor<\/span><span class=\"p\">(<\/span>\r\n    <span class=\"k\">private<\/span> <span class=\"nx\">formBuilder<\/span><span class=\"p\">:<\/span><span class=\"nx\">FormBuilder<\/span>\r\n  <span class=\"p\">)<\/span> <span class=\"p\">{<\/span> <span class=\"p\">}<\/span>\r\n\r\n  <span class=\"nf\">ngOnInit<\/span><span class=\"p\">():<\/span> <span class=\"k\">void<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">title<\/span> <span class=\"o\">=<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">Hello-app<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">message<\/span> <span class=\"o\">=<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">FormControl\u3092\u4f7f\u3046<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n    <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">sampleForm<\/span> <span class=\"o\">=<\/span> <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">formBuilder<\/span><span class=\"p\">.<\/span><span class=\"nf\">group<\/span><span class=\"p\">({<\/span>\r\n      <span class=\"na\">name<\/span><span class=\"p\">:<\/span> <span class=\"p\">[<\/span><span class=\"dl\">''<\/span><span class=\"p\">,<\/span> <span class=\"p\">[<\/span><span class=\"nx\">Validators<\/span><span class=\"p\">.<\/span><span class=\"nx\">required<\/span><span class=\"p\">,<\/span> <span class=\"nx\">Validators<\/span><span class=\"p\">.<\/span><span class=\"nf\">minLength<\/span><span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">)]],<\/span>\r\n      <span class=\"na\">email<\/span><span class=\"p\">:<\/span> <span class=\"p\">[<\/span><span class=\"dl\">''<\/span><span class=\"p\">,<\/span> <span class=\"p\">[<\/span><span class=\"nx\">Validators<\/span><span class=\"p\">.<\/span><span class=\"nx\">required<\/span><span class=\"p\">,<\/span> <span class=\"nx\">Validators<\/span><span class=\"p\">.<\/span><span class=\"nx\">email<\/span><span class=\"p\">]],<\/span>\r\n      <span class=\"na\">age<\/span><span class=\"p\">:<\/span> <span class=\"p\">[<\/span><span class=\"mi\">0<\/span><span class=\"p\">,<\/span> <span class=\"p\">[<\/span><span class=\"nx\">Validators<\/span><span class=\"p\">.<\/span><span class=\"nf\">min<\/span><span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">),<\/span> <span class=\"nx\">Validators<\/span><span class=\"p\">.<\/span><span class=\"nf\">max<\/span><span class=\"p\">(<\/span><span class=\"mi\">150<\/span><span class=\"p\">)]]<\/span>\r\n    <span class=\"p\">});<\/span>\r\n  <span class=\"p\">}<\/span>\r\n\r\n  <span class=\"kd\">get<\/span> <span class=\"nf\">name<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span> <span class=\"k\">return<\/span> <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">sampleForm<\/span><span class=\"p\">.<\/span><span class=\"nf\">get<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">name<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span> <span class=\"p\">}<\/span>\r\n  <span class=\"kd\">get<\/span> <span class=\"nf\">email<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span> <span class=\"k\">return<\/span> <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">sampleForm<\/span><span class=\"p\">.<\/span><span class=\"nf\">get<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">email<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span> <span class=\"p\">}<\/span>\r\n  <span class=\"kd\">get<\/span> <span class=\"nf\">age<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span> <span class=\"k\">return<\/span> <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">sampleForm<\/span><span class=\"p\">.<\/span><span class=\"nf\">get<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">age<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span> <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h5>4. HTML\u7ec4\u4ef6<\/h5>\n<pre class=\"post-pre\"><code><span class=\"nt\">&lt;div<\/span> <span class=\"na\">id=<\/span><span class=\"s\">\"body\"<\/span><span class=\"nt\">&gt;<\/span>\r\n  <span class=\"nt\">&lt;h1&gt;<\/span>{{title}}<span class=\"nt\">&lt;\/h1&gt;<\/span>\r\n  <span class=\"nt\">&lt;p&gt;<\/span>\u30e1\u30c3\u30bb\u30fc\u30b8\uff1a{{message}}<span class=\"nt\">&lt;\/p&gt;<\/span>\r\n  <span class=\"nt\">&lt;form<\/span> <span class=\"na\">[formGroup]=<\/span><span class=\"s\">\"sampleForm\"<\/span><span class=\"nt\">&gt;<\/span>\r\n    <span class=\"nt\">&lt;table&gt;<\/span>\r\n      <span class=\"nt\">&lt;tr&gt;<\/span>\r\n        <span class=\"nt\">&lt;th&gt;<\/span>\u540d\u524d\uff1a<span class=\"nt\">&lt;\/th&gt;<\/span>\r\n        <span class=\"nt\">&lt;td&gt;<\/span>\r\n          <span class=\"nt\">&lt;input<\/span> <span class=\"na\">type=<\/span><span class=\"s\">\"text\"<\/span> <span class=\"na\">formControlName=<\/span><span class=\"s\">\"name\"<\/span><span class=\"nt\">&gt;<\/span>\r\n          <span class=\"nt\">&lt;ng-container<\/span> <span class=\"na\">*ngIf=<\/span><span class=\"s\">\"name?.invalid &amp;&amp; (name?.dirty || name?.touched)\"<\/span><span class=\"nt\">&gt;<\/span>\r\n            <span class=\"nt\">&lt;div<\/span> <span class=\"na\">*ngIf=<\/span><span class=\"s\">\"name?.errors?.['required'] === true\"<\/span> <span class=\"na\">class=<\/span><span class=\"s\">\"error\"<\/span><span class=\"nt\">&gt;<\/span>\u540d\u524d\u306f\u5fc5\u9808\u5165\u529b\u3067\u3059\u3002<span class=\"nt\">&lt;\/div&gt;<\/span>\r\n          <span class=\"nt\">&lt;\/ng-container&gt;<\/span>\r\n        <span class=\"nt\">&lt;\/td&gt;<\/span>\r\n      <span class=\"nt\">&lt;\/tr&gt;<\/span>\r\n      <span class=\"nt\">&lt;tr&gt;<\/span>\r\n        <span class=\"nt\">&lt;th&gt;<\/span>E\u30e1\u30fc\u30eb\uff1a<span class=\"nt\">&lt;\/th&gt;<\/span>\r\n        <span class=\"nt\">&lt;td&gt;<\/span>\r\n          <span class=\"nt\">&lt;input<\/span> <span class=\"na\">type=<\/span><span class=\"s\">\"text\"<\/span> <span class=\"na\">formControlName=<\/span><span class=\"s\">\"email\"<\/span><span class=\"nt\">&gt;<\/span>\r\n          <span class=\"nt\">&lt;ng-container<\/span> <span class=\"na\">*ngIf=<\/span><span class=\"s\">\"email?.invalid &amp;&amp; (email?.dirty || email?.touched)\"<\/span><span class=\"nt\">&gt;<\/span>\r\n            <span class=\"nt\">&lt;div<\/span> <span class=\"na\">*ngIf=<\/span><span class=\"s\">\"email?.errors?.required\"<\/span> <span class=\"na\">class=<\/span><span class=\"s\">\"error\"<\/span><span class=\"nt\">&gt;<\/span>E\u30e1\u30fc\u30eb\u306f\u5fc5\u9808\u5165\u529b\u3067\u3059\u3002<span class=\"nt\">&lt;\/div&gt;<\/span>\r\n            <span class=\"nt\">&lt;div<\/span> <span class=\"na\">*ngIf=<\/span><span class=\"s\">\"email?.errors?.email\"<\/span> <span class=\"na\">class=<\/span><span class=\"s\">\"error\"<\/span><span class=\"nt\">&gt;<\/span>E\u30e1\u30fc\u30eb\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u4e0d\u6b63\u3067\u3059\u3002<span class=\"nt\">&lt;\/div&gt;<\/span>\r\n          <span class=\"nt\">&lt;\/ng-container&gt;<\/span>\r\n        <span class=\"nt\">&lt;\/td&gt;<\/span>\r\n      <span class=\"nt\">&lt;\/tr&gt;<\/span>\r\n      <span class=\"nt\">&lt;tr&gt;<\/span>\r\n        <span class=\"nt\">&lt;th&gt;<\/span>\u5e74\u9f62\uff1a<span class=\"nt\">&lt;\/th&gt;<\/span>\r\n        <span class=\"nt\">&lt;td&gt;<\/span>\r\n          <span class=\"nt\">&lt;input<\/span> <span class=\"na\">type=<\/span><span class=\"s\">\"number\"<\/span> <span class=\"na\">formControlName=<\/span><span class=\"s\">\"age\"<\/span><span class=\"nt\">&gt;<\/span>\r\n          <span class=\"nt\">&lt;ng-container<\/span> <span class=\"na\">*ngIf=<\/span><span class=\"s\">\"age?.invalid &amp;&amp; (age?.dirty || age?.touched)\"<\/span><span class=\"nt\">&gt;<\/span>\r\n            <span class=\"nt\">&lt;div<\/span> <span class=\"na\">*ngIf=<\/span><span class=\"s\">\"age?.errors?.min\"<\/span> <span class=\"na\">class=<\/span><span class=\"s\">\"error\"<\/span><span class=\"nt\">&gt;<\/span>\u5e74\u9f62\u306f1\u624d\u4ee5\u4e0a\u3067\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002<span class=\"nt\">&lt;\/div&gt;<\/span>\r\n            <span class=\"nt\">&lt;div<\/span> <span class=\"na\">*ngIf=<\/span><span class=\"s\">\"age?.errors?.max\"<\/span> <span class=\"na\">class=<\/span><span class=\"s\">\"error\"<\/span><span class=\"nt\">&gt;<\/span>\u5e74\u9f62\u306f150\u624d\u4ee5\u4e0b\u3067\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002<span class=\"nt\">&lt;\/div&gt;<\/span>\r\n          <span class=\"nt\">&lt;\/ng-container&gt;<\/span>\r\n        <span class=\"nt\">&lt;\/td&gt;<\/span>\r\n      <span class=\"nt\">&lt;\/tr&gt;<\/span>\r\n    <span class=\"nt\">&lt;\/table&gt;<\/span>\r\n    <span class=\"nt\">&lt;input<\/span> <span class=\"na\">type=<\/span><span class=\"s\">\"button\"<\/span> <span class=\"na\">value=<\/span><span class=\"s\">\"\u30af\u30ea\u30c3\u30af\"<\/span> <span class=\"na\">[disabled]=<\/span><span class=\"s\">\"sampleForm.invalid\"<\/span><span class=\"nt\">&gt;<\/span>\r\n  <span class=\"nt\">&lt;\/form&gt;<\/span>\r\n<span class=\"nt\">&lt;\/div&gt;<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\u30af\u30ea\u30c3\u30af\u30dc\u30bf\u30f3\u306e [disabled]=&#8221;sampleForm.invalid&#8221; \u306f\u3001\u30a8\u30e9\u30fc\u304c\u306a\u3051\u308c\u3070\u3001\u4f7f\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u305f\u3081\u306e\u8a2d\u5b9a\u3067\u3059\u3002<\/ul>\n<h6>\u5c0f\u5fc3\u8981\u70b9<\/h6>\n<p>\u5c3d\u7ba1\u6309\u7167\u793a\u4f8b\u8fdb\u884c\u4e86\u63cf\u8ff0\uff0c\u4f46\u5728\u786e\u8ba4\u68c0\u67e5\u7ed3\u679c\u65f6\uff0c\u4f7f\u7528ngIf\u8fdb\u884c\u7f16\u8bd1\u65f6\u51fa\u73b0\u4e86\u9519\u8bef\u3002\u7531\u4e8e\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u82b1\u8d39\u4e86\u4e00\u4e9b\u65f6\u95f4\uff0c\u6240\u4ee5\u6211\u7559\u4e0b\u4e86\u5907\u5fd8\u5f55\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nb\">Error<\/span><span class=\"p\">:<\/span> <span class=\"nx\">src<\/span><span class=\"o\">\/<\/span><span class=\"nx\">app<\/span><span class=\"o\">\/<\/span><span class=\"nx\">sample<\/span><span class=\"o\">\/<\/span><span class=\"nx\">sample<\/span><span class=\"p\">.<\/span><span class=\"nx\">component<\/span><span class=\"p\">.<\/span><span class=\"nx\">html<\/span><span class=\"p\">:<\/span><span class=\"mi\">10<\/span><span class=\"p\">:<\/span><span class=\"mi\">59<\/span> <span class=\"o\">-<\/span> <span class=\"nx\">error<\/span> <span class=\"nx\">TS2531<\/span><span class=\"p\">:<\/span> <span class=\"nb\">Object<\/span> <span class=\"k\">is<\/span> <span class=\"nx\">possibly<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">null<\/span><span class=\"dl\">'<\/span><span class=\"p\">.<\/span>\r\n\r\n<span class=\"mi\">10<\/span>           <span class=\"o\">&lt;<\/span><span class=\"nx\">div<\/span> <span class=\"o\">*<\/span><span class=\"nx\">ngIf<\/span><span class=\"o\">=<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">name.invalid &amp;&amp; (name.dirty || name.touched)<\/span><span class=\"dl\">\"<\/span><span class=\"o\">&gt;<\/span>\r\n                                                             <span class=\"o\">~~~~~~~<\/span>\r\n<\/code><\/pre>\n<p>\u5c06\u300cname.touch\u300d\u4fee\u6539\u4e3a\u300cname?.touch\u300d\u540e\uff0c\u9519\u8bef\u5f97\u5230\u89e3\u51b3\u3002\u8fd9\u4e2a\u63cf\u8ff0\u4f3c\u4e4e\u53ef\u4ee5\u907f\u514d\u5728\u51fa\u73b0\u7a7a\u503c\u65f6\u51fa\u73b0\u9519\u8bef\u3002<\/p>\n<p>\u5728\u5c5e\u6027\u58f0\u660e\u4e2d\uff0c\u5982\u679c\u4e0d\u8fdb\u884c\u521d\u59cb\u5316\uff0c\u7f16\u8f91\u5668\u4f1a\u51fa\u73b0\u9519\u8bef\u3002\u4f7f\u7528VS Code\u4e2d\u7684\u5feb\u901f\u4fee\u590d\u529f\u80fd\uff0c\u9519\u8bef\u5c31\u6d88\u5931\u4e86\u3002<\/p>\n<ul class=\"post-ul\">\u300cAdd &#8216;undefined&#8217; type to property &#8216;sampleForm&#8217;\u300d\u3092\u9078\u629e\u3057\u305f\u5834\u5408<\/ul>\n<blockquote><p>\u6837\u672c\u8868\u5355: FormGroup | undefined;<\/p><\/blockquote>\n<p>\u5c5e\u6027\u58f0\u660e\u4e0d\u4f1a\u5f15\u53d1\u9519\u8bef\uff0c\u4f46\u7531\u4e8e\u53c2\u8003\u4f4d\u7f6e\u53ef\u80fd\u4e3aundefined\uff0c\u56e0\u6b64\u53d1\u751f\u4e86\u9519\u8bef\u3002<\/p>\n<ul class=\"post-ul\">\u300cAdd definite assignment assertion to property &#8216;sampleForm:FormGroup&#8217;\u300d\u3092\u9078\u629e\u3057\u305f\u5834\u5408<\/ul>\n<blockquote><p>\u6837\u672c\u8868\u5355\uff01\uff1aFormGroup<\/p><\/blockquote>\n<p>\u7531\u4e8e\u9519\u8bef\u88ab\u4fee\u590d\uff0c\u56e0\u6b64\u8fd9\u4e2a\u5b9a\u4e49\u4f3c\u4e4e\u662f\u6700\u4f73\u9009\u62e9\u3002<\/p>\n<p>\u53ef\u80fd\u7684\u7ffb\u8bd1\uff1a<br \/>\n\u4e0e\u793a\u4f8b\u548c\u4e66\u7c4d\u4e0d\u540c\uff0c\u5b9e\u9645\u4e0a\u51fa\u73b0\u9519\u8bef\u7684\u73b0\u8c61\u53ef\u80fd\u662f\u56e0\u4e3a\u4f7f\u7528\u7684Angular\u6216Node.js\u7248\u672c\u66f4\u65b0\uff0c\u5bfc\u81f4\u4e86TypeScript\u7684\u68c0\u67e5\u66f4\u52a0\u4e25\u683c\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$ <\/span>ng version\r\nYour global Angular CLI version <span class=\"o\">(<\/span>13.1.0<span class=\"o\">)<\/span> is greater than your <span class=\"nb\">local <\/span>version <span class=\"o\">(<\/span>12.1.4<span class=\"o\">)<\/span><span class=\"nb\">.<\/span> The <span class=\"nb\">local <\/span>Angular CLI version is used.\r\n\r\nTo disable this warning use <span class=\"s2\">\"ng config -g cli.warnings.versionMismatch false\"<\/span><span class=\"nb\">.<\/span>\r\n\r\n     _                      _                 ____ _     ___\r\n    \/ <span class=\"se\">\\ <\/span>  _ __   __ _ _   _| | __ _ _ __     \/ ___| |   |_ _|\r\n   \/ \u25b3 <span class=\"se\">\\ <\/span>| <span class=\"s1\">'_ \\ \/ _` | | | | |\/ _` | '<\/span>__|   | |   | |    | |\r\n  \/ ___ <span class=\"se\">\\|<\/span> | | | <span class=\"o\">(<\/span>_| | |_| | | <span class=\"o\">(<\/span>_| | |      | |___| |___ | |\r\n \/_\/   <span class=\"se\">\\_\\_<\/span>| |_|<span class=\"se\">\\_<\/span>_, |<span class=\"se\">\\_<\/span>_,_|_|<span class=\"se\">\\_<\/span>_,_|_|       <span class=\"se\">\\_<\/span>___|_____|___|\r\n                |___\/\r\n\r\n\r\nAngular CLI: 12.1.4\r\nNode: 16.13.1 <span class=\"o\">(<\/span>Unsupported<span class=\"o\">)<\/span>\r\nPackage Manager: npm 8.1.2\r\nOS: win32 x64\r\n\r\nAngular: 12.1.5\r\n... animations, common, compiler, compiler-cli, core, forms\r\n... platform-browser, platform-browser-dynamic, router\r\n\r\nPackage                         Version\r\n<span class=\"nt\">---------------------------------------------------------<\/span>\r\n@angular-devkit\/architect       0.1201.4\r\n@angular-devkit\/build-angular   12.1.4\r\n@angular-devkit\/core            12.1.4\r\n@angular-devkit\/schematics      12.1.4\r\n@angular\/cli                    12.1.4\r\n@schematics\/angular             12.1.4\r\nrxjs                            6.6.7\r\ntypescript                      4.3.5\r\n\r\nWarning: The current version of Node <span class=\"o\">(<\/span>16.13.1<span class=\"o\">)<\/span> is not supported by Angular.\r\n\r\n<\/code><\/pre>\n<h2>\u5355\u72ec\u9a8c\u8bc1<\/h2>\n<pre class=\"post-pre\"><code><span class=\"nf\">\u30e1\u30bd\u30c3\u30c9\u540d <\/span><span class=\"p\">(<\/span><span class=\"nx\">c<\/span><span class=\"p\">:<\/span> <span class=\"nx\">FormControl<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n\r\n  <span class=\"c1\">\/\/\u554f\u984c\u304c\u306a\u3044\u5834\u5408<\/span>\r\n  <span class=\"k\">return<\/span> <span class=\"kc\">null<\/span><span class=\"p\">;<\/span>\r\n\r\n  <span class=\"c1\">\/\/ \u554f\u984c\u304c\u3042\u308b\u5834\u5408<\/span>\r\n  <span class=\"c1\">\/\/return { \u540d\u524d: { valid: boolean\u5024, ... } };<\/span>\r\n  <span class=\"k\">return<\/span> <span class=\"p\">{<\/span> <span class=\"na\">\u540d\u524d<\/span><span class=\"p\">:<\/span> <span class=\"nx\">boolean\u5024<\/span> <span class=\"p\">};<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u4f5c\u4e3a\u793a\u4f8b\uff0c\u6211\u5df2\u7ecf\u6dfb\u52a0\u4e86\u4e00\u4e2a\u9a8c\u8bc1\u65e5\u8bed\u7684\u540d\u5b57\u3002\u4ee5\u4e0b\u662f\u6458\u5f55\u3002<\/p>\n<h5>\u7ec4\u4ef6TS\u6587\u4ef6\u3002<\/h5>\n<pre class=\"post-pre\"><code><span class=\"k\">export<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">SampleComponent<\/span> <span class=\"k\">implements<\/span> <span class=\"nx\">OnInit<\/span> <span class=\"p\">{<\/span>\r\n\r\n  <span class=\"nf\">ngOnInit<\/span><span class=\"p\">():<\/span> <span class=\"k\">void<\/span> <span class=\"p\">{<\/span>\r\n\r\n    <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">sampleForm<\/span> <span class=\"o\">=<\/span> <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">formBuilder<\/span><span class=\"p\">.<\/span><span class=\"nf\">group<\/span><span class=\"p\">({<\/span>\r\n      <span class=\"na\">name<\/span><span class=\"p\">:<\/span> <span class=\"p\">[<\/span><span class=\"dl\">''<\/span><span class=\"p\">,<\/span> <span class=\"p\">[<\/span><span class=\"nx\">Validators<\/span><span class=\"p\">.<\/span><span class=\"nx\">required<\/span><span class=\"p\">,<\/span> <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">isJapanese<\/span><span class=\"p\">]],<\/span>\r\n      <span class=\"na\">email<\/span><span class=\"p\">:<\/span> <span class=\"p\">[<\/span><span class=\"dl\">''<\/span><span class=\"p\">,<\/span> <span class=\"p\">[<\/span><span class=\"nx\">Validators<\/span><span class=\"p\">.<\/span><span class=\"nx\">required<\/span><span class=\"p\">,<\/span> <span class=\"nx\">Validators<\/span><span class=\"p\">.<\/span><span class=\"nx\">email<\/span><span class=\"p\">]],<\/span>\r\n      <span class=\"na\">age<\/span><span class=\"p\">:<\/span> <span class=\"p\">[<\/span><span class=\"mi\">0<\/span><span class=\"p\">,<\/span> <span class=\"p\">[<\/span><span class=\"nx\">Validators<\/span><span class=\"p\">.<\/span><span class=\"nf\">min<\/span><span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">),<\/span> <span class=\"nx\">Validators<\/span><span class=\"p\">.<\/span><span class=\"nf\">max<\/span><span class=\"p\">(<\/span><span class=\"mi\">150<\/span><span class=\"p\">)]]<\/span>\r\n    <span class=\"p\">});<\/span>\r\n  <span class=\"p\">}<\/span>\r\n\r\n  <span class=\"nf\">isJapanese<\/span><span class=\"p\">(<\/span><span class=\"nx\">c<\/span><span class=\"p\">:<\/span> <span class=\"nx\">FormControl<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">JSON<\/span><span class=\"p\">.<\/span><span class=\"nf\">stringify<\/span><span class=\"p\">(<\/span><span class=\"nx\">c<\/span><span class=\"p\">.<\/span><span class=\"nx\">value<\/span><span class=\"p\">));<\/span>\r\n    <span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"nx\">c<\/span><span class=\"p\">.<\/span><span class=\"nx\">value<\/span> <span class=\"o\">==<\/span> <span class=\"kc\">null<\/span> <span class=\"o\">||<\/span> <span class=\"nx\">c<\/span><span class=\"p\">.<\/span><span class=\"nx\">value<\/span> <span class=\"o\">==<\/span> <span class=\"dl\">\"\"<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"kc\">null<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"nx\">c<\/span><span class=\"p\">.<\/span><span class=\"nx\">value<\/span><span class=\"p\">.<\/span><span class=\"nf\">match<\/span><span class=\"p\">(<\/span><span class=\"sr\">\/^<\/span><span class=\"se\">[\\u<\/span><span class=\"sr\">30a0-<\/span><span class=\"se\">\\u<\/span><span class=\"sr\">30ff<\/span><span class=\"se\">\\u<\/span><span class=\"sr\">3040-<\/span><span class=\"se\">\\u<\/span><span class=\"sr\">309f<\/span><span class=\"se\">\\u<\/span><span class=\"sr\">3005-<\/span><span class=\"se\">\\u<\/span><span class=\"sr\">3006<\/span><span class=\"se\">\\u<\/span><span class=\"sr\">30e0-<\/span><span class=\"se\">\\u<\/span><span class=\"sr\">9fcf<\/span><span class=\"se\">]<\/span><span class=\"sr\">+$\/<\/span><span class=\"p\">))<\/span> <span class=\"p\">{<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"kc\">null<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"p\">{<\/span> <span class=\"na\">isJapanese<\/span><span class=\"p\">:<\/span> <span class=\"kc\">false<\/span> <span class=\"p\">};<\/span>\r\n  <span class=\"p\">}<\/span>\r\n\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h4>\u7ec4\u4ef6HTML\u6587\u4ef6<\/h4>\n<pre class=\"post-pre\"><code>      <span class=\"nt\">&lt;tr&gt;<\/span>\r\n        <span class=\"nt\">&lt;th&gt;<\/span>\u540d\u524d\uff1a<span class=\"nt\">&lt;\/th&gt;<\/span>\r\n        <span class=\"nt\">&lt;td&gt;<\/span>\r\n          <span class=\"nt\">&lt;input<\/span> <span class=\"na\">type=<\/span><span class=\"s\">\"text\"<\/span> <span class=\"na\">formControlName=<\/span><span class=\"s\">\"name\"<\/span><span class=\"nt\">&gt;<\/span>\r\n          <span class=\"nt\">&lt;ng-container<\/span> <span class=\"na\">*ngIf=<\/span><span class=\"s\">\"name?.invalid &amp;&amp; (name?.dirty || name?.touched)\"<\/span><span class=\"nt\">&gt;<\/span>\r\n            <span class=\"nt\">&lt;div<\/span> <span class=\"na\">*ngIf=<\/span><span class=\"s\">\"name?.errors?.['required'] === true\"<\/span> <span class=\"na\">class=<\/span><span class=\"s\">\"error\"<\/span><span class=\"nt\">&gt;<\/span>\u540d\u524d\u306f\u5fc5\u9808\u5165\u529b\u3067\u3059\u3002<span class=\"nt\">&lt;\/div&gt;<\/span>\r\n            <span class=\"nt\">&lt;div<\/span> <span class=\"na\">*ngIf=<\/span><span class=\"s\">\"name?.errors?.isJapanese === false\"<\/span> <span class=\"na\">class=<\/span><span class=\"s\">\"error\"<\/span><span class=\"nt\">&gt;<\/span>\u65e5\u672c\u8a9e\u3067\u5165\u529b\u3057\u3066\u4e0b\u3055\u3044\u3002<span class=\"nt\">&lt;\/div&gt;<\/span>\r\n          <span class=\"nt\">&lt;\/ng-container&gt;<\/span>\r\n        <span class=\"nt\">&lt;\/td&gt;<\/span>\r\n      <span class=\"nt\">&lt;\/tr&gt;<\/span>\r\n<\/code><\/pre>\n<h1>\u76f8\u5173\u6587\u7ae0<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Angular \u306f\u3058\u3081\u306b\u899a\u3048\u308b\u3053\u3068<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Angular \u30d5\u30a9\u30fc\u30e0 (1)\uff1a\u57fa\u790e<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">Angular \u6b21\u306b\u899a\u3048\u308b\u3053\u3068<\/ul>\n<h1>\u8bf7\u67e5\u9605\u53c2\u8003\u8d44\u6599\u3002<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u300eAngular\u8d85\u5165\u9580\u300f \u8457\u8005\uff1a\u638c\u7530 \u6d25\u90aa\u4e43<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">https:\/\/angular.jp\/start<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">https:\/\/angular.jp\/guide\/form-validation<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">https:\/\/hepokon365.hatenablog.com\/entry\/2020\/08\/23\/220835<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">https:\/\/itblog.verdy-it.xyz\/ypescript\u578b\u5ba3\u8a00\u5b57\u306e\u30af\u30a8\u30b9\u30c1\u30e7\u30f3\u30de\u30fc\u30af\u3068\u30d3\u30c3\u30af\u30ea\u30de\/<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Angular\u306e\u4fbf\u5229\u30bf\u30b0ng-container, ng-content, ng-template<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">javascript \u65e5\u672c\u8a9e\u30c1\u30a7\u30c3\u30af\u3067\u3059<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">JavaScript\u3067\u3072\u3089\u304c\u306a\u30fb\u30ab\u30bf\u30ab\u30bf\u30fb\u6f22\u5b57\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u65b9\u6cd5\u307e\u3068\u3081<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u9a8c\u8bc1 \u4f7f\u7528\u8868\u5355\u9a8c\u8bc1\u7684\u8bbe\u7f6e\u5982\u4e0b\uff1a \u5728app.module.ts\u6587\u4ef6\u4e2d\uff0c\u5bfc\u5165FormsModule\u6a21\u5757\u3002 \u30d5\u30a9\u30fc\u30e0 [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-39052","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 \u8868\u5355\uff082\uff09\uff1a\u9a8c\u8bc1 - 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-\u8868\u5355\uff082\uff09\uff1a\u9a8c\u8bc1\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Angular \u8868\u5355\uff082\uff09\uff1a\u9a8c\u8bc1\" \/>\n<meta property=\"og:description\" content=\"\u9a8c\u8bc1 \u4f7f\u7528\u8868\u5355\u9a8c\u8bc1\u7684\u8bbe\u7f6e\u5982\u4e0b\uff1a \u5728app.module.ts\u6587\u4ef6\u4e2d\uff0c\u5bfc\u5165FormsModule\u6a21\u5757\u3002 \u30d5\u30a9\u30fc\u30e0 [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/angular-\u8868\u5355\uff082\uff09\uff1a\u9a8c\u8bc1\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2024-01-25T12:23:43+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-29T01:07:51+00:00\" \/>\n<meta name=\"author\" content=\"\u9038, \u79d1\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u9038, \u79d1\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/angular-%e8%a1%a8%e5%8d%95%ef%bc%882%ef%bc%89%ef%bc%9a%e9%aa%8c%e8%af%81\/\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/angular-%e8%a1%a8%e5%8d%95%ef%bc%882%ef%bc%89%ef%bc%9a%e9%aa%8c%e8%af%81\/\",\"name\":\"Angular \u8868\u5355\uff082\uff09\uff1a\u9a8c\u8bc1 - Blog - Silicon 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