[
  {
    "keys": ["tab"],
    "command": "chain",
    "args": {
      "commands": [
        ["expand_abbreviation_by_tab"],
        ["reg_replace", {"replacements": ["js_class", "js_quotes"]}]
      ]
    },
    "context": [
      {"operand": "source.js", "operator": "equal", "match_all": true, "key": "selector"}, 
      {"key": "preceding_text", "operator": "regex_contains", "operand": "(\\w+>\\w+|\\s(\\.?|a|div|span|p|button)\\.\\w+)", "match_all": true},
      {"key": "selection_empty", "operator": "equal", "operand": true, "match_all": true}
    ]
  }
]