Introducing JSX
It is called JSX, and it is a syntax extension to JavaScript.
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It is called JSX, and it is a syntax extension to JavaScript.
Unlike browser DOM elements, React elements are plain objects, and are cheap to create.
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This is typically not necessary for most components in the application.
![](https://www.datocms-assets.com/91338/1672138990-45aa4393-b079-42e1-80f7-13ec397854c4.jpeg)
Bundling is great, but as your app grows, your bundle will grow too.
Sometimes we think about components as being “special cases” of other components.
You can use variables to store elements. This can help you conditionally render a part of the component while the rest of the output doesn’t change.
They accept arbitrary inputs and return React elements describing what should appear on the screen.