Report the key pressed — practice exercise

What you'll be asked to do

1. 1.Report the key pressedexercise · easy · 10 min

   Report which key was pressed.

   Passes when: #out should show a.

2. 2.React to Enterexercise · easy · 10 min · practice plan

   Report Submitted only when Enter is pressed.

   Passes when: #out should show Submitted.

3. 3.Detect a shortcutexercise · easy · 10 min · practice plan

   Report Saved when Ctrl and s are pressed together.

   Passes when: #out should show Saved.

4. 4.Use the input eventexercise · easy · 10 min · practice plan

   Report the field value after it changes.

   Passes when: #out should show abc.

5. 5.Listen on the whole pageexercise · medium · 10 min · practice plan

   Report Closed when Escape is pressed anywhere.

   Passes when: #out should show Closed.

6. 6.Fix keyCode used instead of keybug fix · easy · 8 min

   event.key gives the key name directly.

   Passes when: #out should show Enter.

7. 7.Fix the lowercase key namebug fix · easy · 8 min · practice plan

   Named keys are capitalised, so enter never matches.

   Passes when: #out should show Submitted.

8. 8.Fix keydown used to read the new valuebug fix · easy · 8 min · practice plan

   On keydown the value has not been updated yet.

   Passes when: #out should show abc.

9. 9.Fix the modifier never checkedbug fix · easy · 8 min · practice plan

   The shortcut fires on s alone, without Ctrl.

   Passes when: #out should show Saved.

10. 10.Fix keypress used for Escapebug fix · easy · 8 min · practice plan

    keypress is deprecated and never fires for Escape.

    Passes when: #out should show Closed.

Between them these tasks cover keydown, event.key and Modifier keys.

Looking for a different chapter? See every practice set, or switch to the interview theory questions.