{

  "keys": ["tab"],

  "command": "expand_abbreviation_by_tab", 

  // put comma-separated syntax selectors for which

  // you want to expandEmmet abbreviations into "operand" key

  // instead of SCOPE_SELECTOR.

  // Examples: source.js, text.html - source

  "context": [

    {

      "operand": "SCOPE_SELECTOR",

      "operator": "equal",

      "match_all": true,

      "key": "selector"

    }, 

    // run only if there's no selected text

    {

      "match_all": true,

      "key": "selection_empty"

    },

    // don't work if there are active tabstops

    {

      "operator": "equal",

      "operand": false,

      "match_all": true,

      "key": "has_next_field"

    }, 

    // don't work if completion popup is visible and you

    // want to insert completion with Tab. If you want to

    // expand Emmet with Tab even if popup is visible --

    // remove this section

    {

      "operand": false,

      "operator": "equal",

      "match_all": true,

      "key": "auto_complete_visible"

    },

    {

      "match_all": true,

      "key": "is_abbreviation"

    }

  ]

}