如何解决“您可能需要适当的加载程序来处理此文件类型”错误消息

Question

我用angular8构建了一个简单的应用程序，当我对我的component.ts使用模型时遇到了这个错误。我不知道为什么会这样。任何人都可以帮助我解决这个问题？任何错误消息。但是当我在浏览器上运行它时，它在下面显示错误消息

./src/app/test-form/test-form.component.ts 7:70
Module parse failed: Invalid number (7:70)
You may need an appropriate loader to handle this file type.
|     constructor() {
|         this.topics = ['Angular', 'React', 'Vue'];
>         this.userModel = new User('galih', 'galihindra650@gmail.com', 082312514, '', 'morning', true);
|     }
|     ngOnInit() {

这是我的组件代码

import { User } from '../model/user';

@Component({
  selector: 'app-test-form',
  templateUrl: './test-form.component.html',
  styleUrls: ['./test-form.component.css']
})

export class TestFormComponent implements OnInit {
  topics = ['Angular', 'React', 'Vue'];
  userModel = new User('galih', 'galihindra650@gmail.com', 082312514, '', 'morning', true);
  constructor() { }

  ngOnInit() {
  }

}

班级用户

export class User {
    constructor(
        public name: string,
        public email: string,
        public phone: number,
        public topic: string,
        public timePreference: string,
        public subscribe: boolean
    ) { }
}

该组件的html

<div class="container-fluid col-6">
    <h3>Tes Form</h3>
    <form #userForm="ngForm">
        {{ userForm.value | json }} <br>User model : {{ userModel|json }}
        <!-- <div ngModelGroup="address">
            <div class="form-group">
                <label>City</label>
                <input type="text" required class="form-control" ngModel name="city">
                <small class="text-danger">Name is required</small>
            </div>

            <div class="form-group">
                <label> Street</label>
                <input type="text" class="form-control" ngModel name="street">
            </div>

        </div> -->
        <!-- Biar value setiam input bisa terbaca harus pake ngModel dan dikasih name -->
        <div class="form-group">
            <label>Name</label>
            <input type="text" required class="form-control" [(ngModel)]="userModel.name" name="name">
            <small class="text-danger">Name is required</small>
        </div>

        <div class="form-group">
            <label>Email</label>
            <input type="email" class="form-control" [(ngModel)]="userModel.email" name="email">

. . .