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JavaScript Removing Elements — exercises and bug fixes

5 hands-on exercises and 5 find-the-bug challenges for the JavaScript Removing Elements lesson. Every one is checked automatically in the browser — write the code, run it, and the tests tell you what still fails.

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Exercises(5)

  1. 1

    Remove an element

    easy10 min

    Remove the paragraph and report how many are left in the box.

  2. 2

    Empty an element

    easy10 min

    Clear everything inside the list and report how many items remain.

  3. 3

    Remove several elements

    easy10 min

    Remove every element with the class old and report how many paragraphs are left.

  4. 4

    Guard a missing element

    easy10 min

    Only remove the element if it was actually found, then report a message.

  5. 5

    Put an element back

    medium10 min

    Remove the paragraph then append it again, and report how many are in the box.

Find the bug(5)

  1. 1

    Fix remove called on the parent

    easy8 min

    The paragraph should go, not the whole box.

  2. 2

    Fix remove used without brackets

    easy8 min

    remove is a method and must be called.

  3. 3

    Fix the unguarded removal

    easy8 min

    A missing element gives null, and calling remove on it would throw.

  4. 4

    Fix the text cleared instead of the elements

    easy8 min

    Setting textContent leaves no elements, but the wrong thing was targeted.

  5. 5

    Fix the wrong class removed

    easy8 min

    The elements to keep are being taken off instead.

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