如何在 Angular 中使用 @Hostbinding 来设置动态组件的样式？

Question

我目前正在开发一个 Angular 项目，该项目创建了一堆动态组件，我希望每个组件都具有不同的颜色，具体取决于它在初始化时对服务的调用结果。 该组件的代码如下：

@Component({
  selector: 'app-step',
  templateUrl: './step.component.html',
  styleUrls: ['./step.component.css'],
  providers: [DisplayService, MessageService]
})
export class StepComponent implements OnInit {

//a bunch of other functions and a constructor

findSolutions(defect: Defect): void {
    //this is where I make the call to the service
    this.defectService.getSolutions(defect, this.displayService).subscribe(solutions => {
      if(solutions[0] === undefined) {
          //HERE I want to change the back-ground color of .boxed (element 
          //in the style file) to yellow
        }
        else if(solutions !== undefined) {
          //HERE I want to change the back-ground color of .boxed to green
        }
    });
  }

ngOnInit(): void {
    this.findSolutions(this.defect);
  }
}

有人可以帮我弄清楚如何使用 HostBinding 吗？

Answer 1

为什么不使用 NgClass 添加或删除依赖于组件属性 bool 或值的类？