JSX: Putting HTML Inside Your JavaScript Components

JSX is a syntax extension that lets you write HTML-like markup directly inside your JavaScript files, keeping UI logic and structure together. It's the standard way to define a React component's output. The footgun is that JSX is stricter than HTML.
JSX is a JavaScript syntax extension for writing HTML-like markup directly in your code. This keeps a component's rendering logic and visual structure together, ensuring they stay in sync. It's the standard way to declare what a React component should render. The main footgun is that JSX is stricter than HTML; for example, you must return a single root element from a component, often by wrapping your output in a `<div>` or a Fragment (`<>...</>`).
Read the original → react.dev
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