小编Fuz*_*ley的帖子

在Angular2/Typescript中,是否可以"观察"对象的字段以进行更改.

例如,假设我有一个类Person与领域firstName,lastName和fullName.是否有可能自动更新fullName每当要么firstName或lastName改变？

像这样的东西:

export class Person {
  firstName: string= '';
  lastName: string = '';
  fullName: string = '';

  constructor(firstName: string, lastName: string) {
    this.firstName.onChange(() => { this.updateFullName(); });
    this.lastName.onChange(() => { this.updateFullName(); });

    this.firstName = firstName;
    this.lastName = lastName;
  }

  updateFullName() {
    this.fullName = `${this.firstName} ${this.lastName}`;
  }
}