DOM Interview Trainer

A tiny local practice app for DOM manipulation interviews: type real JavaScript, run it against a sandboxed page, and get tests.

Run it

From the clawd workspace:

cd /home/dallin/clawd/dom-trainer
# any simple static server works; pick one
npx --yes serve .
# or
python3 -m http.server 8080

Then open the printed URL (e.g. http://localhost:3000 or :8080).

What to practice

• querySelector / getElementById
• addEventListener (click, keydown Enter)
• input.value → Number(...) → Number.isFinite
• textContent updates
• createElement + appendChild
• innerHTML clear-and-rebuild
• array ops: push, pop, includes, reduce

Add your own challenges

Edit challenges.js and add another object to the challenges array. Each test is a function that can click buttons, set input values, and assert DOM state.