React HMR SystemJS experiment

system.js

'use strict';

exports.translate = function(load) {

    var prependText =
`
var __export = eval('_export');

var hotExport = function(name, exported) {
    if (!Object.prototype.hasOwnProperty.call(exported, '__source')) {
        Object.defineProperty(exported, '__source', {
            enumerable: false,
            configurable: true,
            value: {
                fileName: '${load.name}',
                exportName: name
            }
        });
    }

    return __export(name, exported);
};

eval('_export = hotExport');

`;

    return prependText + load.source;
};