try...catch Error handling
Last updated: 2026-09-09
try...catch Error handling
try...catch catches runtime errors; finally runs regardless.
| Category | Statements |
|---|---|
| ES version | ES1 |
📝 Syntax
try { ... } catch (err) { ... } finally { ... }Returns：undefined.
Mutates the original：No (returns a new value)
▶ Example
Edit the code, press Run, and see the result in the output panel:
Output：
always runs💡 Tip Always wrap JSON.parse and fetch in try/catch.
ℹ️ info throw new Error('msg') raises an error caught by the nearest catch.
🌐 Browser support
| Browser |  Chrome |
 Edge |
 Firefox |
 Safari |
 Opera |
|---|---|---|---|---|---|
| try...catch | ✓ v1 | ✓ v12 | ✓ v1 | ✓ v1 | ✓ v1 |
| Supported by all modern browsers | |||||
🏷️ Related Items
💡 Related Cases
More case studies coming soon — check back later.
📚 Related Tutorials
❓ FAQ
QDoes try...catch catch async errors?
ANot for Promise errors — use async/await + try/catch or Promise.catch.
QWhat is finally for?
ARuns regardless — for cleanup.
QWhat is throw?
ARaises an error caught by the nearest try...catch.
