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Answer:61 #1449

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291c596
feat: fix forms simplest signal form challenge
tsironis13 Mar 9, 2026
218a335
Merge branch 'main' into forms-simplest-signal-form-challenge
tsironis13 Mar 10, 2026
3d62432
feat: use declarative code to submit the form
tsironis13 Mar 10, 2026
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101 changes: 101 additions & 0 deletions apps/forms/61-simplest-signal-form/src/app/app.component.html
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Original file line number Diff line number Diff line change
@@ -0,0 +1,101 @@
<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 class="space-y-6" [formRoot]="userForm">
<div>
<label for="name" class="mb-2 block text-sm font-medium text-gray-700">
Name
<span class="text-red-500">*</span>
</label>
<input
id="name"
type="text"
[formField]="userForm.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]="
userForm.name().invalid() && userForm.name().touched()
" />
@if (userForm.name().errors().length > 0 && userForm.name().touched()) {
@for (error of userForm.name().errors(); track error) {
<p class="mt-1 text-sm text-red-600">{{ error.message }}</p>
}
}
</div>

<div>
<label
for="lastname"
class="mb-2 block text-sm font-medium text-gray-700">
Last Name
</label>
<input
id="lastname"
type="text"
[formField]="userForm.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>

<div>
<label for="age" class="mb-2 block text-sm font-medium text-gray-700">
Age
</label>
<input
id="age"
type="number"
[formField]="userForm.age"
placeholder="Enter your age (1-99)"
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]="
userForm.age().invalid() && userForm.age().touched()
" />
@if (userForm.age().errors().length > 0 && userForm.age().touched()) {
@for (error of userForm.age().errors(); track error) {
<p class="mt-1 text-sm text-red-600">{{ error.message }}</p>
}
}
</div>

<div>
<label for="note" class="mb-2 block text-sm font-medium text-gray-700">
Note
</label>
<input
id="note"
type="text"
[formField]="userForm.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]="userForm().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>
<button
type="button"
(click)="onReset()"
class="flex-1 rounded-md bg-gray-600 px-4 py-2 font-medium text-white transition hover:bg-gray-700">
Reset
</button>
</div>
</form>

@if (submittedData()) {
<div class="mt-8 rounded-lg border border-green-200 bg-green-50 p-4">
<h2 class="mb-2 text-lg font-semibold text-green-900">
Submitted Data:
</h2>
<pre
class="overflow-x-auto rounded border border-green-200 bg-white p-4 text-sm"
>{{ submittedData() | json }}</pre
>
</div>
}
</div>
</div>
202 changes: 55 additions & 147 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
@@ -1,160 +1,68 @@
import { JsonPipe } from '@angular/common';
import { Component, signal, WritableSignal } from '@angular/core';
import {
FormControl,
FormGroup,
ReactiveFormsModule,
Validators,
} from '@angular/forms';
ChangeDetectionStrategy,
Component,
signal,
WritableSignal,
} from '@angular/core';
import {
form,
FormField,
FormRoot,
max,
min,
required,
} from '@angular/forms/signals';

type UserData = {
name: string;
lastname: string;
age: number | null;
note: string;
};

@Component({
selector: 'app-root',
imports: [ReactiveFormsModule, 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">
<div>
<label
for="name"
class="mb-2 block text-sm font-medium text-gray-700">
Name
<span class="text-red-500">*</span>
</label>
<input
id="name"
type="text"
formControlName="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
" />
@if (form.controls.name.invalid && !form.controls.name.untouched) {
<p class="mt-1 text-sm text-red-600">Name is required</p>
}
</div>

<div>
<label
for="lastname"
class="mb-2 block text-sm font-medium text-gray-700">
Last Name
</label>
<input
id="lastname"
type="text"
formControlName="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>

<div>
<label
for="age"
class="mb-2 block text-sm font-medium text-gray-700">
Age
</label>
<input
id="age"
type="number"
formControlName="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
" />
@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>
}
</div>

<div>
<label
for="note"
class="mb-2 block text-sm font-medium text-gray-700">
Note
</label>
<input
id="note"
type="text"
formControlName="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"
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>
<button
type="button"
(click)="onReset()"
class="flex-1 rounded-md bg-gray-600 px-4 py-2 font-medium text-white transition hover:bg-gray-700">
Reset
</button>
</div>
</form>

@if (submittedData()) {
<div class="mt-8 rounded-lg border border-green-200 bg-green-50 p-4">
<h2 class="mb-2 text-lg font-semibold text-green-900">
Submitted Data:
</h2>
<pre
class="overflow-x-auto rounded border border-green-200 bg-white p-4 text-sm"
>{{ submittedData() | json }}</pre
>
</div>
}
</div>
</div>
`,
imports: [JsonPipe, FormField, FormRoot],
templateUrl: './app.component.html',
changeDetection: ChangeDetectionStrategy.OnPush,
})
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 }),
});
private readonly _initialData: UserData = {
name: '',
lastname: '',
age: null,
note: '',
};
private _userModel = signal<UserData>(this._initialData);

submittedData: WritableSignal<{
name: string;
lastname: string;
age: number | null;
note: string;
} | null> = signal(null);
protected userForm = form(
this._userModel,
(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' });
},
{
submission: {
action: async () => {
if (this.userForm().valid()) {
this.setSubmittedData();
}
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@tomalaforge tomalaforge Mar 10, 2026

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👍

},
},
},
);
protected submittedData: WritableSignal<UserData | null> = signal(null);

onSubmit(): void {
if (this.form.valid) {
this.submittedData.set(this.form.getRawValue());
console.log('Form submitted:', this.submittedData);
}
public onReset(): void {
this.userForm().reset(this._initialData);
this.setSubmittedData();
}

onReset(): void {
this.form.reset();
this.submittedData.set(null);
private setSubmittedData(): void {
const formData = this._userModel();
console.log('Form submitted:', formData);
this.submittedData.set(formData);
}
}