Forms in React vs Angular

⚔️ React vs Angular: Forms Comparison

Feature React Angular

Approach Uncontrolled or Controlled (via state) Template-driven or Reactive Forms

Form Handling Manual handling using state/hooks Declarative, built-in support

Data Binding One-way binding Two-way binding (via [(ngModel)])

Validation Custom (manually coded or libraries) Built-in validators, async validators

Form State Management Via useState, useReducer, libraries Managed internally with FormGroup, etc.

Best for Fine-grained control, custom logic Complex forms, built-in structure

📘 Forms in React

1. Controlled Components (most common)

jsx

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import React, { useState } from 'react';

function MyForm() {

  const [name, setName] = useState('');

  const handleSubmit = (e) => {

    e.preventDefault();

    alert(`Submitted: ${name}`);

  };

  return (

    <form onSubmit={handleSubmit}>

      <input

        type="text"

        value={name}

        onChange={(e) => setName(e.target.value)}

      />

      <button type="submit">Submit</button>

    </form>

  );

}

Every change updates the React state (useState).

You have full control, but must manage state manually.

For complex forms, you might use libraries like:

Formik

React Hook Form

Yup for validation

📗 Forms in Angular

1. Template-driven Form

html

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<form #form="ngForm" (ngSubmit)="onSubmit(form)">

  <input type="text" name="name" ngModel required />

  <button type="submit">Submit</button>

</form>

2. Reactive Form (preferred for complex use cases)

ts

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// my-form.component.ts

import { FormGroup, FormControl } from '@angular/forms';

form = new FormGroup({

  name: new FormControl('')

});

onSubmit() {

  console.log(this.form.value);

}

html

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<form [formGroup]="form" (ngSubmit)="onSubmit()">

  <input type="text" formControlName="name" />

  <button type="submit">Submit</button>

</form>

More structured and powerful.

Good for dynamic and complex validation.

Built-in support for validators like Validators.required.

✅ Summary: When to Use What?

Use Case Use React if... Use Angular if...

Simple forms You want full control with minimal setup You prefer declarative templates

Complex forms with dynamic validation Use libraries like React Hook Form Angular's Reactive Forms are excellent

Need for rapid scaffolding React needs manual wiring Angular provides more out-of-the-box tools

Team preference / familiarity Familiar with JavaScript/JSX Comfortable with TypeScript and Angular concepts

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