Where is React used?

React Alternatives

Vue.js

Progressive JS framework for building user interfaces & single-page applications. Lightweight & flexible with a component-based architecture.

// Example: Defining a component
Vue.component('todo-item', {
  props: ['todo'],
  template: '{{ todo.text }}'
})

• Easier learning curve than React.

• Flexible integration with other libraries.

• Good documentation.

• Potentially lower performance for very large applications.

• Smaller community and ecosystem.

• Less corporate backing compared to React.

Angular

Platform and framework for building client-side applications using TypeScript. Full-scale data binding and dependency injection.

// Example: Component definition
@Component({
  selector: 'app-root',
  template: '

{{title}}

'
})
export class AppComponent {
  title = 'Hello World';
}

• Robust framework with strong typing.

• Comprehensive feature set (routing, forms).

• Corporate backing by Google.

• Steep learning curve due to complexity.

• Verbose and complex code structure.

• May be overkill for small projects.

Svelte

Compiler-based framework that generates efficient code to update DOM. Emphasizes less code and leaner project structures.

// Example: Defining a reactive variable
<script>
  let name = 'world';
</script>

<h1>Hello {name}!</h1>

• No virtual DOM - updates are applied directly.

• Enhanced reactivity with cleaner syntax.

• Reduced boilerplate code.

• Smaller community, fewer resources.

• Less mainstream, could impact hiring.

• Tooling is less mature compared to React.

Quick Facts about React

React's Debut as a Game-Changer

Imagine a world where web pages are as rigid as a starched shirt. Then 2013 hits, and Facebook says 'nah' and spins the game on its head with React. Birthed by Jordan Walke, a software engineer with a craving for dynamism, React splashes onto the scene. It's not just any old JavaScript library—this baby introduces JSX, a quirky syntax marriage between JavaScript and HTML, which lets developers talk to the UI like it's an old pal. Fun Fact: React was first used on Facebook's newsfeed in 2011 before becoming open-source!

Virtual DOM – React’s Secret Ninja

Gone are the days of the clunky, old-school DOM. React developers don a ninja mask with the Virtual DOM—a crafty shadow clone technique. Anytime something changes, this sneaky doppelganger updates ninja-fast without needing to disturb the entire DOM. It's like changing your socks without having to redo your entire outfit—smooth and efficient. This cool trick leaves other libraries in slow-mo, eating React's pixel dust.

The Rise of Hooks in React's Saga

Flash forward to 2018: React developers are chillaxing when suddenly React v16.8 drops, and BOOM—Hooks explode onto the scene. These little wonders let devs use state and other React features without writing a class. It's like having cheat codes for state management and side-effects. With a flick of a useState or useEffect, you're Harry Potter, casting spells in your functional components. No more class warfare. Magic!

function Example() {
  const [count, setCount] = useState(0);

  useEffect(() => {
    document.title = `You clicked ${count} times`;
  });

  return (
    

  );
}

What is the difference between Junior, Middle, Senior and Expert React developer?

Top 10 React Related Tech

1. 
   

   JavaScript (Sure, duh!)

   
   

   Imagine trying to build a house without bricks. That's coding React without JavaScript. It's the Numero Uno, the backbone, the very essence of React. It's like the air for breathing or the water for a fish—absolutely essential, non-negotiable, and omnipresent in the React universe.

1. 
   

   React (The Star of the Show)

   
   

   The belle of the ball, the main squeeze, the showstopper. React's like that cool kid everyone wants to sit with at lunch. It brings components to the party, dances with JSX, and plays well with state and props.

   
   

   
       
       const Greeting = () => <h1>Hello, React World!</h1>;
       
       

1. 
   

   Redux (State’s Guardian)

   
   

   When your states are more scattered than your thoughts on a Monday morning, Redux is the hero that swoops in. It's the keeper of states, the maestro conducting the symphony of actions, reducers, and stores.

   
   

   
       
       import { createStore } from 'redux'
       let store = createStore(todos, ['Use Redux'])
       
       

1. 
   

   TypeScript (JavaScript with a Monocle)

   
   

   It’s JavaScript who went to private school. TypeScript adds type-checking to keep your code as tight as your grandma's knitting. Messy types will have nowhere to hide!

1. 
   

   HTML/CSS (The Fashion Designers)

   
   

   Without HTML/CSS, your React components would be wandering the digital world naked. They give your app the style, the sass, the pizzazz! It's the makeover crew for your JSX elements.

   
   

   
       
       const divStyle = {
         color: 'blue',
         backgroundImage: 'url(' + imgUrl + ')',
       };
       <div style={divStyle}>Stylish!</div>
       
       

1. 
   

   React Router (The Path Finder)

   
   

   Ever been lost in a new city? React Router is your GPS in the React metropolis. It'll navigate you through the concrete jungle of components without breaking a sweat.

1. 
   

   Webpack (The Packing Genius)

   
   

   Imagine packing for vacation with a space limit. Webpack's that genius who fits a month's stuff into a backpack. It bundles up your assets, minifies them, and serves them fresh.

1. 
   

   Babel (The Translator)

   
   

   It's like your polyglot friend who speaks modern JavaScript, but also translates it to a language your grandpa’s browser can understand. It ensures the cool new features you use are comprehensible to the ancient digital beings.

1. 
   

   ESLint (The Code Nanny)

   
   

   It's the stern governess for your code, keeping it clean and proper. ESLint will wag its finger at you for any code mischief and make sure your syntax is as neat as a pin.

1. 
   

   Jest (The Test Master)

   
   

   With Jest, your React components get their own personal drill sergeant ensuring they’re fit for service. Jest runs them through the gauntlet of tests and tells you if they're up to snuff or if they need to hit the gym.

   
   

   
       
       test('two plus two is four', () => {
         expect(2 + 2).toBe(4);
       });