JavaScript · Collections, storage and utilities

localStorage

Stores strings per origin with no expiry. Serialise objects with JSON.

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Syntax

localStorage.setItem(key, value)

Example

Try it

try {
  localStorage.setItem("theme", "dark");
  console.log(localStorage.getItem("theme"));
  localStorage.removeItem("theme");
} catch {
  console.log("Storage is blocked in this sandbox.");
}

Notes

Storage can be blocked or full. Never store secrets or large data there.

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localStorage

Example

Notes

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