Guided Notes

ES6 for React

Arrow functions, classes, destructuring, spread, array methods, modules, and the ternary operator.

Why modern JavaScript matters

Slide 1 / 5

React code leans heavily on JavaScript features added in ES6 (2015) and later. You'll see them on nearly every line:

FeatureWhere it shows up in React
Arrow functionsEvent handlers, components, callbacks
const / letEvery variable and component
DestructuringProps and useState: const [a, setA] = …
Spread ...Copying state objects and arrays
Array map / filterRendering and filtering lists
Modulesimport React / export default App
Ternary ? :Conditional rendering inside JSX
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