Condition Builder | HAP's Learning Lab

Robot ID Card Controls

isOnline

true

isCharging

false

energyLevel 75

Watch how these expressions evaluate as you change the controls:

isOnline && energyLevel > 20

isOnline && energyLevel > 20

Result: true

Both conditions checked

!isOnline || energyLevel < 25

!isOnline || energyLevel < 25

Result: false

Both conditions checked

isOnline && !isCharging && energyLevel > 50

isOnline && !isCharging && energyLevel > 50

Result: true

All conditions checked

energyLevel > 0 || isCharging

energyLevel > 0 || isCharging

Result: true

Short-circuited at first condition!

See how || returns the first truthy value:

nickname =

Try: "hello", 42, 0, null, undefined, "", []

nickname || "HyBit A. ProtoBot"

displayName: "HyBit A. ProtoBot"

nickname is empty (falsy), so it returns the second value