What is sessionStorage used for?
PICTURE THIS: RAG CHATBOT
Simple meaning
SessionStorage is like localStorage but tied to the tab and cleared when that tab closes.
WHY — Browser instead of guessing?
Why interviewers care about Browser:
who only read docs from people who shipped.
and tied to Frontend work.
Name the idea, why it exists, then one short example.
End with when you use it and one common pitfall.
STEPS — What happens step by step?
Before you speak the answer, walk the interviewer through these steps:
- 1SessionStorage is like localStorage
but tied to the tab and cleared when that tab closes.
- 2I use it for
wizard draft data or a flag that should not follow the user to a new tab.
- 3It is still JS-readable,
so it is not a security boundary.
- 4Give an example
One tiny concrete case you can say aloud.
- 5Common mistake
What juniors usually get wrong.
- 6Close
When you pick this over the alternative.
EXAMPLE — See it in action
Here's a short line you can speak, broken into clear beats:
Note: Adapt this scaffold to your own project — keep it under 60–90 seconds.
Key takeaway
SessionStorage is like localStorage but tied to the tab and cleared when that tab closes. I use it for wizard draft data or a flag that should not follow the user to a new tab.