What is JSX?
Why use JSX?
1. Declarative Syntax: JSX enables developers to express the structure and behavior of UI components in a declarative way. With JSX, you can describe what your UI should look like, and React takes care of updating the actual DOM efficiently.
2. Familiar HTML-like Syntax: If you are already familiar with HTML, you'll find JSX syntax to be intuitive and easy to learn. It allows you to write HTML tags, attributes, and nested elements, just like you would in regular HTML.
4. Static Type Checking: JSX works well with static type checking tools like TypeScript and Flow. By using static types, you can catch errors and enforce correct prop types, reducing the chances of runtime errors.
How JSX Works
const element = <h1>Hello, JSX!</h1>;
const element = React.createElement("h1", null, "Hello, JSX!");
Using JSX in React Components
To use JSX in your React components, you need to follow a few conventions:
1. Import React: In every file that contains JSX code, you must import the React library. This is necessary because JSX elements are transformed into React elements.
2. One Root Element: JSX requires a single root element, meaning that you can't have adjacent sibling elements at the top level. Wrapping the elements in a container element solves this problem.
4. Self-Closing Tags: For tags without children, you can use self-closing tags in JSX, similar to HTML.