The idea
Coercion rules are learnable but not guessable. The practical takeaway is to use === and to convert explicitly; the rules are worth knowing mainly so you can read other people's code.
Lesson
No lesson built yet. The worked solutions below are the material it would be assembled from.
Questions (4)
| Question | Type | Difficulty | Drift | Accuracy |
|---|---|---|---|---|
| What does typeof null return? | mcq | Easy -0.90 | — | — (0) |
| What is the value of '5' + 3 and '5' - 3 ? | mcq | Moderate -0.30 | — | — (0) |
| Which of these is true in JavaScript? | mcq | Moderate 0.40 | — | — (0) |
| Explain the difference between ?? and || when providing a default value, and give a case where choosing wr… | short | Hard 1.00 | — | — (0) |