Expects a string with a ':' delimiter. Meant for Vue.js select markup elements and table rendering

Sorting function for objects

sortBy(event = '') {
  let values = event.currentTarget
    ? event.currentTarget.value.split(':')
    : event.split(':');
  let cfg = {
    prop: values[0],
    desc: values[1] ? -1 : 1,
    parser: function(x) {
      return x;
    },
  };

  let parse = function(x) {
    return x;
  };
  let getItem = function(x) {
    var isObject = x != null && typeof x === 'object';
    var isProp = isObject && this.prop in x;
    return this.parser(isProp ? x[this.prop] : x);
  };

  return this.defaultList.sort((a, b) => {
    a = getItem.call(cfg, a);
    b = getItem.call(cfg, b);
    return cfg.desc * (a < b ? -1 : +(a > b));
  });
},