内容简介：翻译自：https://stackoverflow.com/questions/44460778/angular-2-reactive-forms-detect-input-change-event-on-component
我想检测更改事件的值到form.component.ts上的输入.
我不想调用函数ex：(onChange)=“function($event.target.value)”
public form: FormGroup;
constructor(private formBuilder: FormBuilder){
}
private loadForm(){
this.form = this.formBuilder.group({
tipo: [null, Validators.required],
nomeRazao: [null, Validators.compose([Validators.required, Validators.minLength(3), Validators.maxLength(64)])],
apelidoFantasia: [null, Validators.compose([Validators.required, Validators.minLength(3), Validators.maxLength(64)])],
cpfCnpj: [null, Validators.compose([Validators.required, Validators.minLength(11), Validators.maxLength(14)])],
rgIe: [null],
contato: this.formBuilder.group({
email: [null],
telefone: [null]
}),
endereco: this.formBuilder.group({
cep: [null, Validators.pattern('^([0-9]){5}([-])([0-9]){4}$')],
uf: [null],
cidade: [null],
bairro: [null, Validators.required],
logradouro: [null],
complemento: [null],
numero: [null, Validators.pattern('/^\d+$/')]
})
});
}
ngOnInit() {
this.loadForm();
}
您可以使用以下命令订阅表单更改：
this.form.valueChanges.subscribe(() => {
if (this.registerForm.controls['yourControlName'].value === 'someValue') {
//
}
});
翻译自：https://stackoverflow.com/questions/44460778/angular-2-reactive-forms-detect-input-change-event-on-component
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