React Accordion / FAQ Component

Challenge summary

Build a simple FAQ (accordion) UI in React using component state. Clicking a question should toggle its answer.

What you'll practice

• Each FAQ item has a question (header) and an answer (body).
• In the default mode, only one FAQ item can be open at a time.
• Add a control (e.g. a checkbox) to switch to 'allow multiple open' mode.
• In 'allow multiple open' mode, more than one FAQ item can be open at the same time.
• Initially all FAQ items are closed.

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