React JS + Redux - Web development basic Series: Context API (useContext)
Passing props down through five levels just to reach one deeply nested component, called prop drilling, is a real, common pain point. Context lets you skip straight to any component that needs the data. In this video you'll build a real theme context.
Code walkthrough (javascript):
import { createContext } from 'react';
const ThemeContext = createContext('light');
function App() {
return (
‹ThemeContext.Provider value="dark"›
‹Toolbar /›
‹/ThemeContext.Provider›
);
}
function Toolbar() {
return ‹Button /›;
}
import { useContext } from 'react';
function Button() {
const theme = useContext(ThemeContext);
return ‹button className={theme}›Click‹/button›;
}
What it looks like: ❌ theme passed as a prop through Toolbar, which never actually uses it itself → ✅ Button reads theme directly via useContext -- no pass-through prop needed
Try it yourself: Create a real Context of your own, provide a value at the top, and read it with useContext several levels deep.
#react #redux #reacthooks #webdev #javascript #coding #tutorial
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