JustDoItTomorrow
3/8/2018 - 1:08 AM

响应式表单：监听控件变化

直接监听valueChanges事件就可以监听变化

hero-detail.component.ts
content_copyfile_download
nameChangeLog: string[] = [];
logNameChange() {
  const nameControl = this.heroForm.get('name');
  nameControl.valueChanges.forEach(
    (value: string) => this.nameChangeLog.push(value)
  );
}