| # | title | topic | type | difficulty |
|---|---|---|---|---|
| 1 | Event loop machine: sync, a timer, and a promise | Event Loop & Memory | Runtime machine | Easy |
| 2 | Hoisting machine: the creation pass | Scope & Hoisting | Runtime machine | Easy |
| 3 | Scope machine: the lookup walks outward | Scope & Hoisting | Runtime machine | Easy |