Boolean Boolean Object
Last updated: 2026-09-09
Boolean Boolean Object
Boolean provides type checking.
| Category | Data Types |
|---|---|
| ES version | ES1 |
📝 Syntax
Boolean(val);▶ Example
Edit the code, press Run, and see the result in the output panel:
Output：
true
false
true⚠️ Warning 6 falsy values: false, 0, "", null, undefined, NaN.
🏷️ Related Items
💡 Related Cases
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📚 Related Tutorials
❓ FAQ
QWhat are the falsy values?
Afalse, 0, "", null, undefined, NaN.
QWhy is Boolean([]) true?
AAn empty array is an object — always truthy.
