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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.
Every update goes through the same steps so the inputs stay in sync.
Bundling is great, but as your app grows, your bundle will grow too.
Handling events with React elements is very similar to handling events on DOM elements.
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.