export const FieldMatchValidator = (errorName: string = 'notMatched') => {
return (...formControlNames: string[]): ValidatorFn => {
return (group: FormGroup): { [key: string]: any } => {
const controls: AbstractControl[] = formControlNames.map(name => {
return group.controls[name];
});
const areMatched = controls.every((control, index, array) => {
throw new Error('Control not exist or given bad name!');
}
return array[0].value === control.value;
});
controls.forEach(control => {
const controlErrors = control.errors || {};
controlErrors[errorName] = true;
control.setErrors(controlErrors);
control.markAsTouched();
});
return { [errorName]: true };
}
controls.forEach(control => {
const controlErrors = control.errors || {};
delete controlErrors[errorName];
if (Object
.keys
(controlErrors
).length
=== 0) {
control.setErrors(null);
}
});
return null;
};
};
};
// in component (.ts)
this.form = this.formBuilder.group({
usernameInput: ['', Validators.required],
emailInput: ['', [Validators.required, Validators.email]],
phoneInput: ['', Validators.required],
confirmPhoneInput: ['', Validators.required],
passwordInput: ['', [Validators.required]],
confirmPasswordInput: ['', [Validators.required]]
}, { validators: [
FieldMatchValidator('notMatchedPasswords')('passwordInput', 'confirmPasswordInput'),
FieldMatchValidator('notMatchedPhones')('phoneInput', 'confirmPhoneInput')
] });
// in component (.html)
*ngIf="form.hasError('notMatchedPasswords')" or
*ngIf="form.controls['passwordInput'].hasError('notMatchedPasswords')"
{"html5":"htmlmixed","css":"css","javascript":"javascript","php":"php","python":"python","ruby":"ruby","lua":"text\/x-lua","bash":"text\/x-sh","go":"go","c":"text\/x-csrc","cpp":"text\/x-c++src","diff":"diff","latex":"stex","sql":"sql","xml":"xml","apl":"apl","asterisk":"asterisk","c_loadrunner":"text\/x-csrc","c_mac":"text\/x-csrc","coffeescript":"text\/x-coffeescript","csharp":"text\/x-csharp","d":"d","ecmascript":"javascript","erlang":"erlang","groovy":"text\/x-groovy","haskell":"text\/x-haskell","haxe":"text\/x-haxe","html4strict":"htmlmixed","java":"text\/x-java","java5":"text\/x-java","jquery":"javascript","mirc":"mirc","mysql":"sql","ocaml":"text\/x-ocaml","pascal":"text\/x-pascal","perl":"perl","perl6":"perl","plsql":"sql","properties":"text\/x-properties","q":"text\/x-q","scala":"scala","scheme":"text\/x-scheme","tcl":"text\/x-tcl","vb":"text\/x-vb","verilog":"text\/x-verilog","yaml":"text\/x-yaml","z80":"text\/x-z80"}