Can't bind command to Spacebar in Sublime Text

Question

I'm using this two bindings for auto complete:

{
"keys": ["tab"],
"command": "move",
"args": {"by": "lines", "forward": true},
"context":
    [
        { "key": "auto_complete_visible", "operator": "equal", "operand": true }
    ]
},
{
"keys": ["shift+tab"],
"command": "move",
"args": {"by": "lines", "forward": false},
"context":
    [
        { "key": "auto_complete_visible", "operator": "equal", "operand": true }
    ]
},

I would like to add "commit_completion" command to space key:

"keys": ["space"],
"command": "commit_completion",
"context":
    [
        { "key": "auto_complete_visible", "operator": "equal", "operand": true }
    ]
},

But it's not binding, when I press space it acts as normal space(it makes space xD). I'm able to bind it to any other key but not space. What am I missing?

Answer 1

There's not a key code for the space bar that you can bind like that; if you want to bind something to space, you need to use a literal space character:

{
  "keys": [" "],
  "command": "commit_completion",
  "context": [
    { "key": "auto_complete_visible", "operator": "equal", "operand": true }
  ]
},

This is visible in the Sublime console by using sublime.log_input(True) to turn on input logging and then pressing the key; the only thing that gets logged is a character event, and not a key event.

It's also important to note that you never want to bind anything to a character like this unless you're using a context to constrain when the binding applies, or you lose the ability to type that character.