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Sweet Angular good forms, never felt so good

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@cironunesdev

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Fill

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Fill React

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Fill React Validate

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Fill React Validate Submit

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Template-driven

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Template-driven Model-driven
 (reactive)

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Template-driven

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FormsModule

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[(ngModel)] FormsModule

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[(ngModel)] #tpl reference variables FormsModule

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import { NgModule } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { FormsModule } from '@angular/forms'; @NgModule({ imports: [ BrowserModule, FormsModule ] }) export class AppModule {}

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model = { name: '' };

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{{ model.name }} model = { name: '' };

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Invalid!

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Model-driven
 (reactive)

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ReactiveFormsModule

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FormGroup, FormControl, FormArray, FormBuilder ReactiveFormsModule

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import { NgModule } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { ReactiveFormsModule } from '@angular/forms'; @NgModule({ imports: [ BrowserModule, ReactiveFormsModule ] }) export class AppModule {}

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constructor(private fb: FormBuilder) { this.heroForm = fb.group({ name: ['', [Validators.required, Validators.minLength(3)]], rival: [], superpowers: fb.group({ invisibility: false, fly: false, nightVision: false, healing: false }, { validator: superpowersValidator }), sex: [], skills: fb.group({ programming: 0, bjj: 0, fifa: 0 }), github: [] }); }

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Name is required
The min length for the name is 3

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constructor(private fb: FormBuilder) { this.heroForm = fb.group({ name: ['', [Validators.required, Validators.minLength(3)]], rival: [], superpowers: fb.group({ invisibility: false, fly: false, nightVision: false, healing: false }, { validator: superpowersValidator }), sex: [], skills: fb.group({ programming: 0, bjj: 0, fifa: 0 }), github: [] }); }

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export const superpowersValidator = (control: AbstractControl) => { const invisibility = control.get('invisibility'); const fly = control.get('fly'); const healing = control.get('healing'); const nightVision = control.get('nightVision'); const fields = [invisibility, fly, healing, nightVision] .filter(field => field.value === true); if (fields.length < 2) { return { atleasttwo: true }; } return null; };

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Not covered

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Not covered Custom controls

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Not covered Custom controls Async validators

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Not covered Custom controls Async validators Dynamic forms

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T akeaways

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T akeaways Both styles can be used in the same app

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T akeaways Both styles can be used in the same app Pick up the one that works the best for each situation

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T akeaways Both styles can be used in the same app Pick up the one that works the best for each situation Embrace Observables

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github.com/cironunes/good-forms

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Thanks! @cironunesdev