Allow user to switch between countdowns #6
Description
In this issue you will allow a user to click between different countdowns in the list, and this will display the correct countdown in the DOM.
To do this, the "Make single (Christmas) working countdown function" and "Create list of countdowns for other dates" issues should already have been completed.
I imagine that by clicking on a different countdown, this will pass the date into the function that calculatutes time remaining, and this then passes that information to the DOM.
You may want to implement some styling to highlight the selected countdown. If you want to create a separate issue for the front end team to do this, that's fine.