| # | title | topic | type | difficulty |
|---|---|---|---|---|
| 1 | Microtasks vs macrotasks | Quiz: JS Questions | Drag & drop | Hard |
| 2 | Two async functions interleave | Event Loop & Memory | Drag & drop | Medium |
| 3 | Drag the output: timers scheduling timers | Event Loop & Memory | Drag & drop | Hard |
| 4 | Drag the output into order: async/await | Quiz: JS Questions | Drag & drop | Hard |
| 5 | Drag the output into order: closures in loops |
| Quiz: JS Questions |
| Drag & drop |
| Medium |
| 6 | Drag the coercion algorithm into order: [10] == 10 | Type Coercion | Drag & drop | Hard |
| 7 | Drag the property lookup into order | Objects | Drag & drop | Medium |
| 8 | Drag the output into order: references vs copies | Objects | Drag & drop | Medium |
| 9 | Coercion flow: false + 4 | Type Coercion | Drag & drop | Easy |
| 10 | Coercion flow: '5' + 1 | Type Coercion | Drag & drop | Easy |
| 11 | Coercion flow: '5' - 1 | Type Coercion | Drag & drop | Easy |
| 12 | Coercion flow: typeof typeof false | Type Coercion | Drag & drop | Easy |
| 13 | Coercion flow: !!'0' | Type Coercion | Drag & drop | Easy |
| 14 | Coercion flow: 1 + true | Type Coercion | Drag & drop | Easy |
| 15 | Coercion flow: '' || 'anon' | Type Coercion | Drag & drop | Easy |
| 16 | Coercion flow: null + 1 | Type Coercion | Drag & drop | Easy |
| 17 | Coercion flow: building the baNaNa | Type Coercion | Drag & drop | Medium |
| 18 | Coercion flow: 1 + '2' - 3 | Type Coercion | Drag & drop | Medium |
| 19 | Coercion flow: '5' - - '2' | Type Coercion | Drag & drop | Medium |
| 20 | Coercion flow: '10' < '9' | Type Coercion | Drag & drop | Medium |
| 21 | Coercion flow: 1 < 2 < 3 | Type Coercion | Drag & drop | Medium |
| 22 | Coercion flow: 3 > 2 > 1 | Type Coercion | Drag & drop | Medium |
| 23 | Coercion flow: null == undefined | Type Coercion | Drag & drop | Medium |
| 24 | Coercion flow: true + true + '1' | Type Coercion | Drag & drop | Medium |
| 25 | Coercion flow: NaN == NaN | Type Coercion | Drag & drop | Medium |
| 26 | Coercion flow: [] + {} | Type Coercion | Drag & drop | Hard |
| 27 | Coercion flow: {} + [] (statement position) | Type Coercion | Drag & drop | Hard |
| 28 | Coercion flow: [] == ![] | Type Coercion | Drag & drop | Hard |
| 29 | Coercion flow: null >= 0 | Type Coercion | Drag & drop | Hard |
| 30 | Hoisting flow: console.log(x); var x = 5 | Scope & Hoisting | Drag & drop | Easy |