Here is a simple shortcut that runs the command upper_case
when you press ctrl+u.
{ "keys": ["ctrl+u"], "command": "upper_case" }
I've set the content of my keybindings like this, but it doesn't work!
It's normal! It's because it has to be a list of object (you probably want more than one shortcut, right?). Here's how it should look like:
[ { "keys": ["ctrl+u"], "command": "upper_case" } ]
Now it works!