Key Bindings — User.json

{"keys": ["tab"], "command": "expand_abbreviation_by_tab", "context":
  [
    { "operand": "source.js", "operator": "equal", "match_all": true, "key": "selector" },
    { "match_all": true, "key": "selection_empty" },
    { "operator": "equal", "operand": false, "match_all": true, "key": "has_next_field" },
    { "operand": false, "operator": "equal", "match_all": true, "key": "auto_complete_visible" },
    { "match_all": true, "key": "is_abbreviation" }
  ]
}

Thank you!

Works amazing!, thanks you