Angular 9 mat-progress-buttons 错误：由于编译错误，无法编译入口点 mat-progress-buttons (es2015 as

# 解决Angular 9中mat-progress-buttons编译错误的步骤和案例

bash
    ng update @angular/cli@9
    

typescript
// app.module.ts
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { MatProgressButtonsModule } from 'mat-progress-buttons';
import { AppComponent } from './app.component';
@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    MatProgressButtonsModule.forRoot(),
  ],
  bootstrap: [AppComponent]
})
export class AppModule { }

html
  
  Click me

typescript
// app.component.ts
import { Component } from '@angular/core';
@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  isLoading = false;
  simulateAsyncOperation() {
    this.isLoading = true;
    // Simulate an async operation
    setTimeout(() => {
      this.isLoading = false;
    }, 2000);
  }
}