1. ReactJS

ReactJS is a component-based library developed by Facebook (Meta). It is not a full-fledged framework because React is responsible only for the "view layer," and you typically need to integrate additional libraries for other functionalities.

• Goal-Oriented Minimalism (Minimal Core)

  React offers a very streamlined approach: "only the essentials." For example, you add separate libraries for routing or global state management across your application.

• Virtual DOM

  The "Virtual DOM" is one of React's strongest features. When the UI needs to update, React first performs calculations in the virtual DOM and then updates only the necessary parts of the real DOM, often enhancing performance.

• Learning Curve

  React is relatively easy to learn, but you'll need to be familiar with additional libraries like React Router, Redux, Redux Toolkit, or Context API.

React Example Code:

import React from 'react';

// A small React component
function HelloWorld() {
  // Use Fragment or <> </> to return multiple tags in the return statement
  return (
    <>
      <h1>Hello World!</h1>
      <p>This is an example of a React component</p>
    </>
  );
}

export default HelloWorld;

2. Angular

Angular is a comprehensive front-end framework developed by Google, built on TypeScript. It includes all necessary functionalities out of the box, meaning you don't have to juggle multiple libraries.

• Strict Structure

  Angular has a clear set of rules and structures: sections like "components," "services," and "modules" are predefined.

• TypeScript

  TypeScript is a superset of JavaScript. Angular is written in TypeScript, providing a more organized structure and a strict type system, which is beneficial for large projects.

• Two-Way Data Binding

  Angular is traditionally known for its "two-way data binding," meaning the model (data) and the view (UI) stay synchronized.

• Complexity

  Angular is well-suited for corporate-level or complex projects due to its extensive features. However, this also adds to its complexity.

Angular Example Code:

import { Component } from '@angular/core';

@Component({
  selector: 'app-hello-world',
  template: `
    <!-- Example of two-way data binding in the template -->
    <h1>Hello World</h1>
    <p>This is an example of an Angular component</p>
  `
})
export class HelloWorldComponent {
  // We use TypeScript in Angular
}

3. VueJS

VueJS is a "progressive" framework created by Evan You. It's called "progressive" because Vue can be incrementally adopted, from small projects to large-scale applications.

• Minimal Core + Ecosystem

  Like React, Vue has a minimal core, but its official extensions (routing, global state management – Vuex or Pinia) integrate seamlessly.

• Easy Integration

  Integrating Vue into an existing project or starting fresh is both very straightforward.

• Reactivity

  Vue uses a unique "reactive" system for tracking and updating data. Similar to React's Virtual DOM, Vue also utilizes a Virtual DOM.

• Learning Curve

  Vue's syntax is simple and user-friendly, making it understandable even within half a day.

Vue Example Code:

<template>
  <!-- In Vue templates, we access data using {{ }} -->
  <div>
    <h1>Hello World</h1>
    <p>This is an example of a Vue component</p>
  </div>
</template>

<script>
export default {
  name: 'HelloWorld',
  data() {
    // data stores the component's state
    return {
      message: 'Greetings from the Vue component!'
    };
  }
};
</script>

<style scoped>
/* Scoped style - only applies to this component */
h1 {
  color: #42b983;
}
</style>

4. Which One is Right for You?

• ReactJS – If you're looking for a library that's quick to learn but requires high flexibility, React might be the right choice. It's very popular in "freelance" projects with many clients.
• Angular – Ideal for corporate or complex projects. It offers TypeScript, a clear structure, and years of community experience. However, it requires some time and effort to learn.
• VueJS – Very beginner-friendly. Easy to learn and adaptable to large projects. Vue is widely used for projects ranging from medium-sized to large "start-ups."

Conclusion

• ReactJS has a minimal core as a "library" and is one of the most widely used in the JavaScript ecosystem.
• Angular includes all necessary tools as a framework but is complex and requires TypeScript.
• VueJS allows for growth from beginner level to large-scale projects with its simplicity.

Consider the size of your project, your team's experience, and future scalability when making your choice. Each has its own set of advantages and limitations.