TS Basics Challenge

Write a function checkStar(star) that accepts an object conforming to the interface Star { name: string; magnitude?: number }. The function should:

If name is empty (length 0), return 'Invalid Star'.
If magnitude is present, return 'Magnitude: ' followed by the magnitude value.
If magnitude is missing, return 'Magnitude: unknown'.

Examples

checkStar({ name: "Vega", magnitude: 0.03 })

→ "Magnitude: 0.03"

checkStar({ name: "Polaris" })

→ "Magnitude: unknown"

solution.ts

TYPESCRIPT

Saved as you type

Tests

0 of 3 passing

•
Vega → Magnitude: 0.03
checkStar({ name: "Vega", magnitude: 0.03 })
expected "Magnitude: 0.03"
•
Polaris no magnitude → unknown
checkStar({ name: "Polaris" })
expected "Magnitude: unknown"
•
Empty name → Invalid Star
checkStar({ name: "", magnitude: 1.5 })
expected "Invalid Star"

On the line

+40 XP

Pass all 3 tests to claim it.