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JavaScript Creating Elements — exercises and bug fixes

5 hands-on exercises and 5 find-the-bug challenges for the JavaScript Creating 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

    Create and attach an element

    easy10 min

    Create a paragraph, put it in the box, and report how many exist.

  2. 2

    Set content before attaching

    easy10 min

    Create a button with the text Save and report its text.

  3. 3

    Build a list in a loop

    easy10 min

    Create one list item per name and report how many were made.

  4. 4

    Set a class on a new element

    easy10 min

    Create a div with the class card and report its class.

  5. 5

    Clone an element

    medium10 min

    Clone the row and report how many rows there are afterwards.

Find the bug(5)

  1. 1

    Fix the element never attached

    easy8 min

    A created element is invisible until it is appended.

  2. 2

    Fix the tag written with brackets

    easy8 min

    createElement takes a tag name, not markup.

  3. 3

    Fix the element created outside the loop

    easy8 min

    One element is being reused, so only the last name survives.

  4. 4

    Fix the shallow clone

    easy8 min

    cloneNode without true copies the element but not its contents.

  5. 5

    Fix append called on the new element

    easy8 min

    The new element is being appended to itself instead of the box.

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