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我创建了一个 Angular 应用程序并成功编译它：

 10% building 3/3 modules 0 activei ｢wds｣: Project is running at http://localhost:4200/webpack-dev-server/
i ｢wds｣: webpack output is served from /
i ｢wds｣: 404s will fallback to //index.html

chunk {main} main.js, main.js.map (main) 163 kB [initial] [rendered]
chunk {polyfills} polyfills.js, polyfills.js.map (polyfills) 399 kB [initial] [rendered]
chunk {runtime} runtime.js, runtime.js.map (runtime) 6.09 kB [entry] [rendered]
chunk {styles} styles.js, styles.js.map (styles) 186 kB [initial] [rendered]
chunk {vendor} vendor.js, vendor.js.map (vendor) 7.95 MB [initial] [rendered]
Date: 2019-11-15T07:04:24.466Z - Hash: 14ff089b7b0356766301 - Time: 16736ms
** Angular Live Development Server is listening on localhost:4200, open your browser on http://localhost:4200/ **
i ｢wdm｣: Compiled successfully.

但是当我去时，http://localhost:4200我在浏览器选项卡中只看到应用程序的名称和徽标，但在内容位置看到一个空白页。我可以在此地址上运行其他应用程序，但这个新应用程序不起作用并显示任何内容。

您可以在此处找到项目文件：https ://github.com/rajishpajish/test

编辑：我检查了开发人员控制台作为建议的答案，并发现此错误消息：

Uncaught Error: Template parse errors:
Can't bind to 'dividerColor' since it isn't a known property of 'mat-form-field'.
1. If 'mat-form-field' is an Angular component and it has 'dividerColor' input, then verify that it is part of this module.
2. If 'mat-form-field' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message.
3. To allow any property add 'NO_ERRORS_SCHEMA' to the '@NgModule.schemas' of this component. ("
      <p>
        <mat-form-field class="full-width"
         [ERROR ->]dividerColor="{{(formErrors.author) ? 'warn' : 'primary'}}">
          <input matInput formControlNa"): ng:///AppModule/DishDetailComponent.html@62:9
Can't bind to 'dividerColor' since it isn't a known property of 'mat-form-field'.
1. If 'mat-form-field' is an Angular component and it has 'dividerColor' input, then verify that it is part of this module.
2. If 'mat-form-field' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message.
3. To allow any property add 'NO_ERRORS_SCHEMA' to the '@NgModule.schemas' of this component. ("
      <p>
        <mat-form-field class="full-width"
         [ERROR ->]dividerColor="{{(formErrors.comment) ? 'warn' : 'primary'}}">
          <textarea matInput formContr"): ng:///AppModule/DishDetailComponent.html@75:9
    at syntaxError (compiler.js:2175)
    at TemplateParser.parse (compiler.js:11188)
    at JitCompiler._parseTemplate (compiler.js:25721)
    at JitCompiler._compileTemplate (compiler.js:25709)
    at compiler.js:25653
    at Set.forEach (<anonymous>)
    at JitCompiler._compileComponents (compiler.js:25653)
    at compiler.js:25566
    at Object.then (compiler.js:2166)
    at JitCompiler._compileModuleAndComponents (compiler.js:25565)

由于我是一个新的 Angular 学习者，不知道这个模块是否已被弃用以及如何用新模块替换它？

4

2 回答 2

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如果您打开开发者控制台，您会看到其中一个模板 (DishDetailComponent.html@75:9) 中有错误：

模板 DishDetailComponent.html@75:9 中的错误

如您所见，它抱怨组件中没有dividerColor属性mat-form-field。也许这是一个已弃用的属性，因为我在其 API 中看不到它：https ://material.angular.io/components/form-field/api

于 2019-11-15T08:02:49.577 回答
0

我在这里找到了一个更改日志：https ://www.reddit.com/r/Angular2/comments/86ta8k/angular_material_600beta5_changelog/并在我的项目中替换了所有dividerColorscolor并且它有效！

感谢@Fel 的帮助。

于 2019-11-15T08:40:48.150 回答