*** Please note that there will be no further versions of this extension. The functionality of this extension will shortly be merged into Hide Activity Details. Please see extension homepage for more details. ***
Trello shows completed checklist items by default. I often have multiple checklists on a card, and I like to see what’s left to do without having to scroll. This extension sets completed checklist items to be hidden on opening a card.
Completed items are still there, however — you can see them by clicking “Show completed items” in the checklist header. They’ll be hidden again when you open the card later.