Unlocking the Secrets of Top Front‑End Frameworks: React, Angular, and Vue Explained

The author explores the current top front‑end technologies to guide development choices.

React

React (React.js) is a JavaScript library for building user interfaces, maintained by Facebook and the open‑source community. It focuses on rendering UI to the DOM; additional libraries such as Redux and React Router are used for state management and routing.

Basic Usage

Example of a simple React component using JSX:

<div id="myReactApp"></div>
<script type="text/babel">
function Greeter(props) {
  return <h1>{props.greeting}</h1>;
}
var App = <Greeter greeting="Hello World!" />;
ReactDOM.render(App, document.getElementById("myReactApp"));
</script>

The result renders “Hello World!” inside the target div.

Key Features

Component‑based : UI is built from reusable components that receive props.

Functional and class components : Functions return JSX; class components extend React.Component and can hold state.

Virtual DOM : React computes a diff and updates only changed parts.

Lifecycle methods : e.g., shouldComponentUpdate, componentDidMount, componentWillUnmount, render.

JSX : JavaScript XML syntax that resembles HTML.

Hooks : useState, useEffect, etc., enable state and side‑effects in functional components.

Angular

Angular (Angular 2+) is a TypeScript‑based open‑source web application framework maintained by Google. It replaces the original AngularJS with a component‑centric architecture.

Differences from AngularJS

No scopes or controllers; uses hierarchical components.

Template syntax uses [] for property binding and () for event binding.

Modular design with extensive tooling (CLI, RxJS, etc.).

Key Features

Component‑based structure.

Routing with Angular Router.

Dependency injection and services.

CLI commands for project creation, development, and production builds.

Vue.js

Vue.js is an open‑source progressive JavaScript framework for building user interfaces and single‑page applications. It emphasizes a declarative rendering system and component composition.

Core Concepts

Component system that extends native HTML elements.

Template syntax that compiles to a virtual DOM.

Reactive data system that tracks dependencies.

Transition effects for entering/leaving elements.

Vue Router for SPA navigation.

Official tools such as Vue CLI, Vue Devtools, and Vuex for state management.

Example Component

<div id="tuto">
  <button-clicked v-bind:initial-count="0"></button-clicked>
</div>

<script>
Vue.component('button-clicked', {
  props: ["initialCount"],
  data: () => ({ count: 0 }),
  template: `<button v-on:click="onClick">Clicked {{ count }} times</button>`,
  methods: { onClick() { this.count += 1; } },
  mounted() { this.count = this.initialCount; }
});
new Vue({ el: '#tuto' });
</script>

Conclusion

The article compares React, Angular, and Vue, highlighting their component models, rendering strategies, ecosystem tools, and typical commands for creating, developing, and building projects. Choosing the right framework depends on team skill set, learning curve, and project complexity.