What this snippet does
typeof is the primary way to check a value's type, but null and arrays are known gotchas.
Expected output
number string boolean undefined object object object function
Why practise typing this
Typing types code builds muscle memory for the symbols and indentation JavaScript uses most, which prose-based typing tests never cover. DevType measures your words per minute and accuracy on this snippet and tracks the individual characters you mistype, so later lessons can target them.
More JavaScript practice
- typeof nullTypes · beginner
- implicit coercionTypes · beginner
- loose equalityTypes · intermediate
- explicit conversionTypes · intermediate
- let vs constVariables · beginner
- const configVariables · beginner