Inside [jr]feat: Dynamic Forms And Wizards Educational

Demo 1 puts FormArray to work with a live participant list where users add and remove attendees—watch form state update instantly. The live preview of form values and validation status turns abstract concepts into clear, visible outcomes. Demo 2 builds a step-by-step wizard, each phase validated separately; progress halts until each step is complete. Together, they show how Angular’s form system lets developers build intuitive, safe forms—no magic, just structure. The noSpacesValidator and minAgeValidator ensure real-world rules feel tangible, not theoretical. Here is the full component: src/app/dynamic-forms/dynamic-forms.component.ts, dynamic-forms.component.html, and custom-validators/no-spaces.validator.ts. The FormArray lets developers manage dynamic lists with ease—each participant form group reacts instantly to changes. The wizard structure enforces logic step-by-step, preventing invalid data flow. Both demos rely on <app-error-message> for accessible error feedback, reinforcing good UX. The current step indicator guides users, while live value displays keep the model transparent. Here is the component:nntsnimport { Component, OnInit } from '@angular/forms';nimport { FormBuilder, FormGroup, FormArray, FormControl, Validators } from '@angular/forms';nimport { minAgeValidator } from 'custom-validators/min-age.validator';nimport { noSpacesValidator } from 'custom-validators/no-spaces.validator';nnexport class DynamicFormsComponent implements OnInit {n form: FormGroup;nn constructor(private fb: FormBuilder) {}nn ngOnInit() {n this.form = this.fb.group({n participants: this.fb.array([]) as FormArrayn });n }nn get participants(): FormArray {n return this.form.get('participants') as FormArray;n }nn addParticipant() {n const participant = this.fb.group({n name: new FormControl('', [noSpacesValidator(), Validators.required]),n age: new FormControl(null, [minAgeValidator(18), Validators.required])}n );n this.participants.push(participant);n }nn removeParticipant(index: number) {n this.participants.removeAt(index);n }n}nnn```htmlnn