function umd(name, api) {
  if (typeof exports === "object" && typeof module !== "undefined") {
    module.exports = api;
  } else if (typeof define === "function" && define.amd) {
    define([], function() { return api; });
  } else {
    var globalScope;
    if (typeof window !== "undefined") {
      globalScope = window;
    } else if (typeof global !== "undefined") {
      globalScope = global;
    } else if (typeof self !== "undefined") {
      globalScope = self;
    } else {
      globalScope = this;
    }
    globalScope[name] = api;
  }
}