JS Hoist implementation

hoist.js

function hoist (source, target, property, prfx, sufx) {
  for (var p in source[property]) {
    target[(prfx||'') + p + (sufx||'')] = source[property][p];
  }
}

var source = {
  loader: {
    fire: function () { alert('fire!') }
  }
};

var target = {};

hoist(source, target, 'loader', 'loader_');

target.loader_fire();