Data Types Playground
Practice Arrays, Objects, Sets, and Maps. Add, update, delete, and see how each structure behaves.
Controls
Choose structure
Array
Object
Set
Map
Action
Add
Update
Delete
Key (Object/Map only)
Value
Use non-mutating array methods (toSorted / toSpliced)
Freeze Object (demo)
Map Demo: Object Key
Run Action
Output
Array
Object
Set
Map
Loop and Method Demos
Run Loop Demos
Run Method Demos