相关疑难解决方法(0)

index.html的:

  <app [myname]="some_name"></app>

app.component.ts:

  import {Component, Input, Output} from '@angular/core';

  @Component({
    selector: 'app',
    template: '<span>{{myname}}</span>'
  })

  export class CupBuyComponent {
      @Input() myname: String;

      constructor(){
          console.log(this.myname);
      }
  }

JS控制台说未定义.如何从.html文件中获取变量以将其发送到组件？