Electronでfont-managerを使う

 
const fm = require('font-manager');
var fonts = fm.getAvailableFontsSync();

const fm = require('font-manager');
var fonts = fm.getAvailableFontsSync();
object_array_sort(fonts, 'family', 'asc', function(fonts_sorted){

  console.log(fonts_sorted);  //fonts_sortedに整理されたフォントが入る

});

function object_array_sort(data,key,order,fn){
  //デフォは降順(DESC)
  var num_a = -1;
  var num_b = 1;

  if(order === 'asc'){//指定があれば昇順(ASC)
    num_a = 1;
    num_b = -1;
  }

  data = data.sort(function(a, b){
    var x = a[key];
    var y = b[key];
    if (x > y) return num_a;
    if (x < y) return num_b;
    return 0;
  });

  //重複排除
  var arrObj = {};
  for (var i = 0; i < data.length; i++) {
    arrObj[data[i]['family']] = data[i];
  }

  data = [];
  for (var key in arrObj) {
    data.push(arrObj[key]);
  }

  fn(data); // ソート後の配列を返す
}

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Electronでfont-managerを使う