Introducing JSX
It is called JSX, and it is a syntax extension to JavaScript.
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Rendering Elements
Unlike browser DOM elements, React elements are plain objects, and are cheap to create.
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Goharbar farm and nursery in local news TV channel
Forwarding Refs
This is typically not necessary for most components in the application.
Lifting State Up
Every update goes through the same steps so the inputs stay in sync.
Code-Splitting
Bundling is great, but as your app grows, your bundle will grow too.
Handling Events
Handling events with React elements is very similar to handling events on DOM elements.
Composition vs Inheritance
Sometimes we think about components as being “special cases” of other components.
Conditional Rendering
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.
Components and Props
They accept arbitrary inputs and return React elements describing what should appear on the screen.