dynvar/dist/index.js

Dynamic variable support for JS

'use strict';

Object.defineProperty(exports, '__esModule', {
  value: true
});
var vars = Symbol('VARS');
var top = Symbol('TOPVARS');
global[vars] = global[top] = Object.create(null);

function dynvar(name, value) {
  if (arguments.length < 2) {
    return global[vars][name];
  } else {
    global[vars][name] = value;
    return value;
  }
}
dynvar.define = function (name, value) {
  return global[top][name] = value;
};
dynvar.bind = function (varsAndValues, cb) {
  try {
    global[vars] = Object.create(global[vars]);
    for (var key in varsAndValues) {
      if (varsAndValues.hasOwnProperty(key)) {
        global[vars][key] = varsAndValues[key];
      }
    }
    return cb();
  } finally {
    global[vars] = Object.getPrototypeOf(global[vars]) || top;
  }
};

exports['default'] = dynvar;
module.exports = exports['default'];