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JavaScript location Object — exercises and bug fixes

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

    Read the hostname

    easy10 min

    Parse a URL and report its host.

  2. 2

    Read the path

    easy10 min

    Parse a URL and report its path.

  3. 3

    Read a query parameter

    easy10 min

    Parse the query string and read the id.

  4. 4

    Handle a missing parameter

    easy10 min

    Report what a missing parameter gives back.

  5. 5

    Build a query string

    medium10 min

    Build a query string from two parameters.

Find the bug(5)

  1. 1

    Fix search read without URLSearchParams

    easy8 min

    The raw search string still has the question mark and the key attached.

  2. 2

    Fix pathname read as hostname

    easy8 min

    hostname and pathname give different parts of the URL.

  3. 3

    Fix the missing parameter unchecked

    easy8 min

    A missing parameter gives null, which must be checked.

  4. 4

    Fix the query string built by hand

    easy8 min

    Joining strings misses the escaping a real query string needs.

  5. 5

    Fix the parameter never set

    easy8 min

    The value must be set before toString includes it.

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