Angular Form Valid Status Monitor

 ngOnInit(): void {
    this.validateForm = this.formBuilder.group({
      from_name: ['', Validators.required],
      from_companyName: [''],
      from_email: ['', [Validators.pattern(this.emailRegex), Validators.maxLength(49)]],
      from_phone: [''],
      from_address1: ['', [Validators.required, Validators.maxLength(39)]],
      from_address2: ['', Validators.maxLength(39)],
      from_suburb: ['', [Validators.required]],
      from_country: ['', Validators.required],
      from_state: ['', Validators.required],
      from_postcode: ['', [Validators.required, postcodeValidator()]],
    });

    //监听数据变化 
    this.validateForm.valueChanges.subscribe(data => console.log('form', data));
    //监听状态变化 
    this.validateForm.statusChanges.subscribe(data => console.log('status', data));

  }