10 React Questions part 1

1. How can you import and export components?

- export default ComponentName
- import ComponentName from
'components/ComponentName';

2. How can you optimize a React app?

1) useMemo hook memoizes
expensive data

2) PureComponent
and putting state down reduce
re-renders

3) lazy loading makes
the app load faster

3. How can you perform an automatic redirect?

With:

<Redirect to="/some-path" />

4. How do you create a React app?

- install Node,
- call npx create-react-app my-app,
- open the code in your favorite
code editor.

5. How do you memoize a component?

By wrapping a function returning
a component with React.memo.
React.memo will re-render the
component only when function
props change.