Angular 物料输入模块不工作角度9

我使用的是角材料组件 但是材质动画不起作用

包依赖关系

"dependencies": {
"@angular/animations": "~9.1.1",
"@angular/cdk": "^9.2.1",
"@angular/common": "~9.1.1",
"@angular/compiler": "~9.1.1",
"@angular/core": "~9.1.1",
"@angular/forms": "~9.1.1",
"@angular/material": "^9.2.1",
"@angular/platform-browser": "~9.1.1",
"@angular/platform-browser-dynamic": "~9.1.1",
"@angular/router": "~9.1.1",
"rxjs": "~6.5.4",
"tslib": "^1.10.0",
"zone.js": "~0.10.2"

},

App.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { FormsModule} from '@angular/forms';
import {MatInputModule} from '@angular/material/input';
import { MatCardModule} from '@angular/material/card';
import { MatButtonModule} from '@angular/material/button';
import { MatToolbarModule} from '@angular/material/toolbar';
import {MatExpansionModule} from '@angular/material/expansion';
import {MatFormFieldModule} from '@angular/material/form-field';

import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import {PostCreateComponent} from './posts/post-create/post-create.component';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { HeaderComponent } from './header/header.component';
import { PostListComponent } from './posts/post-list/post-list.component';


@NgModule({
  declarations: [
    AppComponent,
    PostCreateComponent,
    HeaderComponent,
    PostListComponent
  ],
  imports: [
    BrowserModule,
    AppRoutingModule,
    FormsModule,
    BrowserAnimationsModule,
    MatInputModule, MatCardModule,MatButtonModule,MatToolbarModule,MatExpansionModule,MatFormFieldModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

HTML:

---

请像这样在

@NgModule

相应模块的decorator中导入

MatInputModule

@NgModule({
  declarations: [
    AppComponent,
    UserComponent
  ],
  imports: [
    BrowserModule,
    BrowserAnimationsModule,
    MatInputModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})

---

你添加Css了吗？它已经在原始问题的导入中导入了？

mat-card{

  background-color: lavender;
  box-shadow: currentColor;

}
mat-form-field,
textarea{
  background-color: white;
  width: 100%;
  margin: 10px;
}

button{
  background-color: indigo;
  color: ivory;
  margin-left: 10px;
}

@NgModule({
  declarations: [
    AppComponent,
    UserComponent
  ],
  imports: [
    BrowserModule,
    BrowserAnimationsModule,
    MatInputModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})