'垫子形式字段'不是已知的元素-Angular 9&材料9.2.0

Question

嗨，我使用的是angular 9，我的代码如下：HTML组件为"post-create.component.HTML">：

<mat-mat-form-field>
<textarea rows="6" [(ngModel)]="enteredValue"></textarea>
</mat-mat-form-field>

我的应用程序模块.ts文件

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { MatCardModule } from '@angular/material/Card';
import { MatInputModule } from '@angular/material/input';

import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { PostCreateComponent } from './posts/post-create/post-create.component';
import { from } from 'rxjs';

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

package.json

{
"name": "mean-course",
"version": "0.0.0",
"scripts": {
"ng": "ng",
"start": "ng serve",
"build": "ng build",
"test": "ng test",
"lint": "ng lint",
"e2e": "ng e2e"
},
"private": true,
"dependencies": {
"@angular/animations": "~9.1.0",
"@angular/cdk": "^9.2.0",
"@angular/common": "~9.1.0",
"@angular/compiler": "~9.1.0",
"@angular/core": "~9.1.0",
"@angular/forms": "~9.1.0",
"@angular/material": "^9.2.0",
"@angular/platform-browser": "~9.1.0",
"@angular/platform-browser-dynamic": "~9.1.0",
"@angular/router": "~9.1.0",
"rxjs": "~6.5.4",
"tslib": "^1.10.0",
"zone.js": "~0.10.2"
},
"devDependencies": {
"@angular-devkit/build-angular": "~0.901.0",
"@angular/cli": "~9.1.0",
"@angular/compiler-cli": "~9.1.0",
"@angular/language-service": "~9.1.0",
"@types/node": "^12.11.1",
"@types/jasmine": "~3.5.0",
"@types/jasminewd2": "~2.0.3",
"codelyzer": "^5.1.2",
"jasmine-core": "~3.5.0",
"jasmine-spec-reporter": "~4.2.1",
"karma": "~4.4.1",
"karma-chrome-launcher": "~3.1.0",
"karma-coverage-istanbul-reporter": "~2.1.0",
"karma-jasmine": "~3.0.1",
"karma-jasmine-html-reporter": "^1.4.2",
"protractor": "~5.4.3",
"ts-node": "~8.3.0",
"tslint": "~6.1.0",
"typescript": "~3.8.3"
}
}
{
"name": "mean-course",
"version": "0.0.0",
"scripts": {
"ng": "ng",
"start": "ng serve",
"build": "ng build",
"test": "ng test",
"lint": "ng lint",
"e2e": "ng e2e"
},
"private": true,
"dependencies": {
"@angular/animations": "~9.1.0",
"@angular/cdk": "^9.2.0",
"@angular/common": "~9.1.0",
"@angular/compiler": "~9.1.0",
"@angular/core": "~9.1.0",
"@angular/forms": "~9.1.0",
"@angular/material": "^9.2.0",
"@angular/platform-browser": "~9.1.0",
"@angular/platform-browser-dynamic": "~9.1.0",
"@angular/router": "~9.1.0",
"rxjs": "~6.5.4",
"tslib": "^1.10.0",
"zone.js": "~0.10.2"
},
"devDependencies": {
"@angular-devkit/build-angular": "~0.901.0",
"@angular/cli": "~9.1.0",
"@angular/compiler-cli": "~9.1.0",
"@angular/language-service": "~9.1.0",
"@types/node": "^12.11.1",
"@types/jasmine": "~3.5.0",
"@types/jasminewd2": "~2.0.3",
"codelyzer": "^5.1.2",
"jasmine-core": "~3.5.0",
"jasmine-spec-reporter": "~4.2.1",
"karma": "~4.4.1",
"karma-chrome-launcher": "~3.1.0",
"karma-coverage-istanbul-reporter": "~2.1.0",
"karma-jasmine": "~3.0.1",
"karma-jasmine-html-reporter": "^1.4.2",
"protractor": "~5.4.3",
"ts-node": "~8.3.0",
"tslint": "~6.1.0",
"typescript": "~3.8.3"
}
}

如果我正确地理解我不知何故/在哪里错过了垫子的定义。。。标签，但我不知道我需要把什么样的定义放在哪里？有人能给我一点启发吗？

Answer 1

必须将MatFormFieldModule添加到AppModule

import { MatFormFieldModule } from '@angular/material/form-field';
...
@NgModule({
imports: [
...
MatFormFieldModule
]
})

Answer 2

我知道它的回复很晚，但我也遇到了同样的问题，只需安装jquery并将其添加到脚本中即可解决。您需要执行以下步骤：

1. 打字错误，它将是"垫形式字段"；而不是"；垫子形式字段">
2. npm install jquery--save运行此命令
3. 添加jquery"/node_modules/jquery/dist/jquery.min.js"；路径下的angular.json文件；脚本"：[]