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Answer:61 #1413

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97 changes: 48 additions & 49 deletions apps/forms/61-simplest-signal-form/src/app/app.component.ts
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Original file line number Diff line number Diff line change
@@ -1,21 +1,23 @@
import { JsonPipe } from '@angular/common';
import { Component, signal, WritableSignal } from '@angular/core';
import {
FormControl,
FormGroup,
ReactiveFormsModule,
Validators,
} from '@angular/forms';
import { Field, form, max, min, required } from '@angular/forms/signals';

interface IFormData {
name: string;
lastname: string;
age: number;
note: string;
}

@Component({
selector: 'app-root',
imports: [ReactiveFormsModule, JsonPipe],
imports: [Field, JsonPipe],
template: `
<div class="min-h-screen bg-gray-100 px-4 py-12 sm:px-6 lg:px-8">
<div class="mx-auto max-w-md rounded-lg bg-white p-8 shadow-md">
<h1 class="mb-6 text-3xl font-bold text-gray-900">Simple Form</h1>

<form [formGroup]="form" (ngSubmit)="onSubmit()" class="space-y-6">
<form (submit)="onSubmit($event)" class="space-y-6">
<div>
<label
for="name"
Expand All @@ -26,14 +28,16 @@ import {
<input
id="name"
type="text"
formControlName="name"
[field]="form.name"
placeholder="Enter your name"
class="w-full rounded-md border border-gray-300 px-4 py-2 outline-none transition focus:border-blue-500 focus:ring-2 focus:ring-blue-500"
[class.border-red-500]="
form.controls.name.invalid && !form.controls.name.untouched
form.name().invalid() && form.name().touched()
" />
@if (form.controls.name.invalid && !form.controls.name.untouched) {
<p class="mt-1 text-sm text-red-600">Name is required</p>
@if (form.name().errors().length > 0 && form.name().touched()) {
@for (error of form.name().errors(); track error) {
<p class="mt-1 text-sm text-red-600">{{ error.message }}</p>
}
}
</div>

Expand All @@ -46,7 +50,7 @@ import {
<input
id="lastname"
type="text"
formControlName="lastname"
[field]="form.lastname"
placeholder="Enter your last name"
class="w-full rounded-md border border-gray-300 px-4 py-2 outline-none transition focus:border-blue-500 focus:ring-2 focus:ring-blue-500" />
</div>
Expand All @@ -60,23 +64,16 @@ import {
<input
id="age"
type="number"
formControlName="age"
[field]="form.age"
placeholder="Enter your age (1-99)"
min="1"
max="99"
class="w-full rounded-md border border-gray-300 px-4 py-2 outline-none transition focus:border-blue-500 focus:ring-2 focus:ring-blue-500"
[class.border-red-500]="
form.controls.age.invalid && !form.controls.age.untouched
form.age().invalid() && form.age().touched()
" />
@if (form.controls.age.invalid && !form.controls.age.untouched) {
<p class="mt-1 text-sm text-red-600">
@if (form.controls.age.hasError('min')) {
Age must be at least 1
}
@if (form.controls.age.hasError('max')) {
Age must be at most 99
}
</p>
@if (form.age().errors().length > 0 && form.age().touched()) {
@for (error of form.age().errors(); track error) {
<p class="mt-1 text-sm text-red-600">{{ error.message }}</p>
}
}
</div>

Expand All @@ -89,15 +86,15 @@ import {
<input
id="note"
type="text"
formControlName="note"
[field]="form.note"
placeholder="Enter a note"
class="w-full rounded-md border border-gray-300 px-4 py-2 outline-none transition focus:border-blue-500 focus:ring-2 focus:ring-blue-500" />
</div>

<div class="flex gap-4">
<button
type="submit"
[disabled]="form.invalid"
[disabled]="form().invalid()"
class="flex-1 rounded-md bg-blue-600 px-4 py-2 font-medium text-white transition hover:bg-blue-700 disabled:cursor-not-allowed disabled:bg-gray-400">
Submit
</button>
Expand Down Expand Up @@ -126,35 +123,37 @@ import {
`,
})
export class AppComponent {
form = new FormGroup({
name: new FormControl('', {
validators: Validators.required,
nonNullable: true,
}),
lastname: new FormControl('', { nonNullable: true }),
age: new FormControl<number | null>(null, [
Validators.min(1),
Validators.max(99),
]),
note: new FormControl('', { nonNullable: true }),
formDefaults: IFormData = {
name: '',
lastname: '',
age: null!,
note: '',
};

formModel = signal<IFormData>(this.formDefaults);

form = form<IFormData>(this.formModel, (schemaPath) => {
required(schemaPath.name, { message: 'Name is required' });
min(schemaPath.age, 1, { message: 'Age must be at least 1' });
max(schemaPath.age, 99, { message: 'Age must be at most 99' });
});

submittedData: WritableSignal<{
name: string;
lastname: string;
age: number | null;
note: string;
} | null> = signal(null);
submittedData: WritableSignal<IFormData | null> = signal(null);

onSubmit(): void {
if (this.form.valid) {
this.submittedData.set(this.form.getRawValue());
onSubmit(e: Event): void {
e.preventDefault();
if (this.form().valid()) {
this.submittedData.set({
...this.form().value(),
// Form returns age as string from the input for some reason, convert it to number
age: +this.form().value().age,
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Owner

@tomalaforge tomalaforge Jan 7, 2026

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That's interesting. I'll check that.

});
console.log('Form submitted:', this.submittedData);
}
}

onReset(): void {
this.form.reset();
this.form().reset(this.formDefaults);
this.submittedData.set(null);
}
}
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