| # | title | topic | type | difficulty |
|---|---|---|---|---|
| 1 | Event loop machine: microtasks cutting the line | Event Loop & Memory | Runtime machine | Hard |
| 2 | Hoisting machine: inside a function call | Scope & Hoisting | Runtime machine | Hard |
| 3 | Scope machine: one j, many i's | Scope & Hoisting | Runtime machine | Hard |
| 4 | The this machine: an arrow is not a fifth rule | this Binding | Runtime machine |
| Hard |
| 5 | The this machine: new beats bind | this Binding | Runtime machine | Hard |
| 6 | The frame machine: a rAF inside a rAF | Rendering & Frames | Runtime machine | Hard |
| 7 | The module machine: a circular import, half-built | Modules | Runtime machine | Hard |