React

An open-source library javascript library primarily used for website development.

• maintained by Meta
• can be used w/ frameworks like Next.js
• only for rendering DOM
  • relies on libraries for routing & client side functionality
  • only re-renders those parts of the page that have changed

React components are JavaScript functions that return markup:

React Component || Typescript

function MyButton() {
  return (
    <button>I'm a button</button>
  );
}

Now you can use this react component in other react components/markup

...
<h2>Hi Kasi</h2>
<MyButton />
...

JSX

JavaScript syntax extension popularized by React. It lets you write HTML-like markup inside a JavaScript file.

https://react.dev/learn/writing-markup-with-jsx

Citations

• https://react.dev/learn
• https://en.wikipedia.org/wiki/React_(software)