localStorage.getItem() Read data
Last updated: 2026-09-09
localStorage.getItem() Read data
getItem reads a value from localStorage by key. Returns null if the key doesn't exist.
| Category | Browser (BOM) |
|---|---|
| ES version | DOM |
📝 Syntax
const value = localStorage.getItem('key');⚙️ Parameters
| key | The storage key. |
|---|
Returns：The stored string value, or null.
Mutates the original：No (returns a new value)
▶ Example
Edit the code, press Run, and see the result in the output panel:
Output：
Zhang
Zhang
null💡 Tip Check for null before JSON.parse — the key may not exist on first visit.
ℹ️ info Values are always strings — use Number() to convert.
🌐 Browser support
| Browser |  Chrome |
 Edge |
 Firefox |
 Safari |
 Opera |
|---|---|---|---|---|---|
| localStorage.getItem() | ✓ v1 | ✓ v12 | ✓ v1 | ✓ v1 | ✓ v1 |
| Supported by all modern browsers | |||||
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❓ FAQ
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