无法读取未定义Angular 5的属性“ hostView”

Question

我正在尝试创建自己的模态，除了单击外部以将其关闭之外，其他所有功能均正常。我收到错误消息“无法读取未定义的属性'hostView'     在DomService.removeComponent上，这是我的代码： 在我的布局中：

<div id="modal-container" class="hidden" (click)="removeModal()">
    <div id="app-modal"></div>
</div>
removeModal() {   
 this.modalService.destroy();
}

我的modalService：

init(component: any, inputs: object, outputs: object, mc?: string) {
    this.component = component;
    const componentConfig = {
      inputs: inputs,
      outputs: outputs
};
this.domService.appendComponentTo(this.modalElementId, component, componentConfig);

document.getElementById(this.modalElementIdWrapper).className = 'show';
document.getElementById(this.overlayElementId).className = 'show';
document.getElementById(this.modalElementId).addEventListener('click', function(event) { 
  event.stopPropagation();
});
  document.getElementById(this.modalElementId).className = 'dialog';
  document.getElementById(this.modalElementId).className = mc + ' dialog';
}

destroy() {
    this.domService.removeComponent();
    document.getElementById(this.modalElementIdWrapper).className = 'hidden';
    document.getElementById(this.overlayElementId).className = 'hidden';
}

我的Dom服务：

public appendComponentTo(parentId: string, child: any, childConfig?: childConfig) {
// Create a component reference from the component 
const childComponentRef = this.componentFactoryResolver
  .resolveComponentFactory(child)
  .create(this.injector);



// Attach the config to the child (inputs and outputs)
this.attachConfig(childConfig, childComponentRef);

this.childComponentRef = childComponentRef;
// Attach component to the appRef so that it's inside the ng component tree
this.appRef.attachView(childComponentRef.hostView);

// Get DOM element from component
const childDomElem = (childComponentRef.hostView as EmbeddedViewRef<any>)
  .rootNodes[0] as HTMLElement;

// Append DOM element to the body
document.getElementById(parentId).appendChild(childDomElem);

}

public removeComponent() {
  this.appRef.detachView(this.childComponentRef.hostView);
  this.childComponentRef.destroy();
}