core-js/internals/enum-keys.js

Standard library

var objectKeys = require('../internals/object-keys');
var getOwnPropertySymbolsModule = require('../internals/object-get-own-property-symbols');
var propertyIsEnumerableModule = require('../internals/object-property-is-enumerable');

// all enumerable object keys, includes symbols
module.exports = function (it) {
  var result = objectKeys(it);
  var getOwnPropertySymbols = getOwnPropertySymbolsModule.f;
  if (getOwnPropertySymbols) {
    var symbols = getOwnPropertySymbols(it);
    var propertyIsEnumerable = propertyIsEnumerableModule.f;
    var i = 0;
    var key;
    while (symbols.length > i) if (propertyIsEnumerable.call(it, key = symbols[i++])) result.push(key);
  } return result;
};