At least we don’t use the Roman method of varied hour lengths depending in the time of day and times of year.
I don’t have an example, but I would like to see a rotary phone dial ui as input method for a phone number.
Edit: I see there’s mentions and a gif in another comment.
My assumption is that it’s setting up an object to map element selectors -> callbacks.
var specialElementHandlers = { '#editor': function() { return true; } };
But yeah, could be something as
var specialElementHandlers = Object.assign({}, defaultHandlers, { '#editor': function() { return true; } }; // missing closing parenthesis