choo/dist/bundle.js

A 4kb framework for creating sturdy frontend applications

(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.Choo = f()}})(function(){var define,module,exports;return (function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){
var assert = require(8)
var LRU = require(11)

module.exports = ChooComponentCache

function ChooComponentCache (state, emit, lru) {
  assert.ok(this instanceof ChooComponentCache, 'ChooComponentCache should be created with `new`')

  assert.equal(typeof state, 'object', 'ChooComponentCache: state should be type object')
  assert.equal(typeof emit, 'function', 'ChooComponentCache: emit should be type function')

  if (typeof lru === 'number') this.cache = new LRU(lru)
  else this.cache = lru || new LRU(100)
  this.state = state
  this.emit = emit
}

// Get & create component instances.
ChooComponentCache.prototype.render = function (Component, id) {
  assert.equal(typeof Component, 'function', 'ChooComponentCache.render: Component should be type function')
  assert.ok(typeof id === 'string' || typeof id === 'number', 'ChooComponentCache.render: id should be type string or type number')

  var el = this.cache.get(id)
  if (!el) {
    var args = []
    for (var i = 2, len = arguments.length; i < len; i++) {
      args.push(arguments[i])
    }
    args.unshift(Component, id, this.state, this.emit)
    el = newCall.apply(newCall, args)
    this.cache.set(id, el)
  }

  return el
}

// Because you can't call `new` and `.apply()` at the same time. This is a mad
// hack, but hey it works so we gonna go for it. Whoop.
function newCall (Cls) {
  return new (Cls.bind.apply(Cls, arguments)) // eslint-disable-line
}

},{"11":11,"8":8}],2:[function(require,module,exports){
var scrollToAnchor = require(23)
var documentReady = require(7)
var nanotiming = require(19)
var nanorouter = require(17)
var nanomorph = require(12)
var nanoquery = require(15)
var nanohref = require(10)
var nanoraf = require(16)
var nanobus = require(9)
var assert = require(8)

var Cache = require(1)

module.exports = Choo

var HISTORY_OBJECT = {}

function Choo (opts) {
  var timing = nanotiming('choo.constructor')
  if (!(this instanceof Choo)) return new Choo(opts)
  opts = opts || {}

  assert.equal(typeof opts, 'object', 'choo: opts should be type object')

  var self = this

  // define events used by choo
  this._events = {
    DOMCONTENTLOADED: 'DOMContentLoaded',
    DOMTITLECHANGE: 'DOMTitleChange',
    REPLACESTATE: 'replaceState',
    PUSHSTATE: 'pushState',
    NAVIGATE: 'navigate',
    POPSTATE: 'popState',
    RENDER: 'render'
  }

  // properties for internal use only
  this._historyEnabled = opts.history === undefined ? true : opts.history
  this._hrefEnabled = opts.href === undefined ? true : opts.href
  this._hashEnabled = opts.hash === undefined ? false : opts.hash
  this._hasWindow = typeof window !== 'undefined'
  this._cache = opts.cache
  this._loaded = false
  this._stores = [ondomtitlechange]
  this._tree = null

  // state
  var _state = {
    events: this._events,
    components: {}
  }
  if (this._hasWindow) {
    this.state = window.initialState
      ? Object.assign({}, window.initialState, _state)
      : _state
    delete window.initialState
  } else {
    this.state = _state
  }

  // properties that are part of the API
  this.router = nanorouter({ curry: true })
  this.emitter = nanobus('choo.emit')
  this.emit = this.emitter.emit.bind(this.emitter)

  // listen for title changes; available even when calling .toString()
  if (this._hasWindow) this.state.title = document.title
  function ondomtitlechange (state) {
    self.emitter.prependListener(self._events.DOMTITLECHANGE, function (title) {
      assert.equal(typeof title, 'string', 'events.DOMTitleChange: title should be type string')
      state.title = title
      if (self._hasWindow) document.title = title
    })
  }
  timing()
}

Choo.prototype.route = function (route, handler) {
  var routeTiming = nanotiming("choo.route('" + route + "')")
  assert.equal(typeof route, 'string', 'choo.route: route should be type string')
  assert.equal(typeof handler, 'function', 'choo.handler: route should be type function')
  this.router.on(route, handler)
  routeTiming()
}

Choo.prototype.use = function (cb) {
  assert.equal(typeof cb, 'function', 'choo.use: cb should be type function')
  var self = this
  this._stores.push(function (state) {
    var msg = 'choo.use'
    msg = cb.storeName ? msg + '(' + cb.storeName + ')' : msg
    var endTiming = nanotiming(msg)
    cb(state, self.emitter, self)
    endTiming()
  })
}

Choo.prototype.start = function () {
  assert.equal(typeof window, 'object', 'choo.start: window was not found. .start() must be called in a browser, use .toString() if running in Node')
  var startTiming = nanotiming('choo.start')

  var self = this
  if (this._historyEnabled) {
    this.emitter.prependListener(this._events.NAVIGATE, function () {
      self._matchRoute(self.state)
      if (self._loaded) {
        self.emitter.emit(self._events.RENDER)
        setTimeout(scrollToAnchor.bind(null, window.location.hash), 0)
      }
    })

    this.emitter.prependListener(this._events.POPSTATE, function () {
      self.emitter.emit(self._events.NAVIGATE)
    })

    this.emitter.prependListener(this._events.PUSHSTATE, function (href) {
      assert.equal(typeof href, 'string', 'events.pushState: href should be type string')
      window.history.pushState(HISTORY_OBJECT, null, href)
      self.emitter.emit(self._events.NAVIGATE)
    })

    this.emitter.prependListener(this._events.REPLACESTATE, function (href) {
      assert.equal(typeof href, 'string', 'events.replaceState: href should be type string')
      window.history.replaceState(HISTORY_OBJECT, null, href)
      self.emitter.emit(self._events.NAVIGATE)
    })

    window.onpopstate = function () {
      self.emitter.emit(self._events.POPSTATE)
    }

    if (self._hrefEnabled) {
      nanohref(function (location) {
        var href = location.href
        var hash = location.hash
        if (href === window.location.href) {
          if (!self._hashEnabled && hash) scrollToAnchor(hash)
          return
        }
        self.emitter.emit(self._events.PUSHSTATE, href)
      })
    }
  }

  this._setCache(this.state)
  this._matchRoute(this.state)
  this._stores.forEach(function (initStore) {
    initStore(self.state)
  })

  this._tree = this._prerender(this.state)
  assert.ok(this._tree, 'choo.start: no valid DOM node returned for location ' + this.state.href)

  this.emitter.prependListener(self._events.RENDER, nanoraf(function () {
    var renderTiming = nanotiming('choo.render')
    var newTree = self._prerender(self.state)
    assert.ok(newTree, 'choo.render: no valid DOM node returned for location ' + self.state.href)

    assert.equal(self._tree.nodeName, newTree.nodeName, 'choo.render: The target node <' +
      self._tree.nodeName.toLowerCase() + '> is not the same type as the new node <' +
      newTree.nodeName.toLowerCase() + '>.')

    var morphTiming = nanotiming('choo.morph')
    nanomorph(self._tree, newTree)
    morphTiming()

    renderTiming()
  }))

  documentReady(function () {
    self.emitter.emit(self._events.DOMCONTENTLOADED)
    self._loaded = true
  })

  startTiming()
  return this._tree
}

Choo.prototype.mount = function mount (selector) {
  var mountTiming = nanotiming("choo.mount('" + selector + "')")
  if (typeof window !== 'object') {
    assert.ok(typeof selector === 'string', 'choo.mount: selector should be type String')
    this.selector = selector
    mountTiming()
    return this
  }

  assert.ok(typeof selector === 'string' || typeof selector === 'object', 'choo.mount: selector should be type String or HTMLElement')

  var self = this

  documentReady(function () {
    var renderTiming = nanotiming('choo.render')
    var newTree = self.start()
    if (typeof selector === 'string') {
      self._tree = document.querySelector(selector)
    } else {
      self._tree = selector
    }

    assert.ok(self._tree, 'choo.mount: could not query selector: ' + selector)
    assert.equal(self._tree.nodeName, newTree.nodeName, 'choo.mount: The target node <' +
      self._tree.nodeName.toLowerCase() + '> is not the same type as the new node <' +
      newTree.nodeName.toLowerCase() + '>.')

    var morphTiming = nanotiming('choo.morph')
    nanomorph(self._tree, newTree)
    morphTiming()

    renderTiming()
  })
  mountTiming()
}

Choo.prototype.toString = function (location, state) {
  state = state || {}
  state.components = state.components || {}
  state.events = Object.assign({}, state.events, this._events)

  assert.notEqual(typeof window, 'object', 'choo.mount: window was found. .toString() must be called in Node, use .start() or .mount() if running in the browser')
  assert.equal(typeof location, 'string', 'choo.toString: location should be type string')
  assert.equal(typeof state, 'object', 'choo.toString: state should be type object')

  this._setCache(state)
  this._matchRoute(state, location)
  this.emitter.removeAllListeners()
  this._stores.forEach(function (initStore) {
    initStore(state)
  })

  var html = this._prerender(state)
  assert.ok(html, 'choo.toString: no valid value returned for the route ' + location)
  assert(!Array.isArray(html), 'choo.toString: return value was an array for the route ' + location)
  return typeof html.outerHTML === 'string' ? html.outerHTML : html.toString()
}

Choo.prototype._matchRoute = function (state, locationOverride) {
  var location, queryString
  if (locationOverride) {
    location = locationOverride.replace(/\?.+$/, '').replace(/\/$/, '')
    if (!this._hashEnabled) location = location.replace(/#.+$/, '')
    queryString = locationOverride
  } else {
    location = window.location.pathname.replace(/\/$/, '')
    if (this._hashEnabled) location += window.location.hash.replace(/^#/, '/')
    queryString = window.location.search
  }
  var matched = this.router.match(location)
  this._handler = matched.cb
  state.href = location
  state.query = nanoquery(queryString)
  state.route = matched.route
  state.params = matched.params
}

Choo.prototype._prerender = function (state) {
  var routeTiming = nanotiming("choo.prerender('" + state.route + "')")
  var res = this._handler(state, this.emit)
  routeTiming()
  return res
}

Choo.prototype._setCache = function (state) {
  var cache = new Cache(state, this.emitter.emit.bind(this.emitter), this._cache)
  state.cache = renderComponent

  function renderComponent (Component, id) {
    assert.equal(typeof Component, 'function', 'choo.state.cache: Component should be type function')
    var args = []
    for (var i = 0, len = arguments.length; i < len; i++) {
      args.push(arguments[i])
    }
    return cache.render.apply(cache, args)
  }

  // When the state gets stringified, make sure `state.cache` isn't
  // stringified too.
  renderComponent.toJSON = function () {
    return null
  }
}

},{"1":1,"10":10,"12":12,"15":15,"16":16,"17":17,"19":19,"23":23,"7":7,"8":8,"9":9}],3:[function(require,module,exports){
(function (global){
'use strict';

var objectAssign = require(20);

// compare and isBuffer taken from https://github.com/feross/buffer/blob/680e9e5e488f22aac27599a57dc844a6315928dd/index.js
// original notice:

/*!
 * The buffer module from node.js, for the browser.
 *
 * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>
 * @license  MIT
 */
function compare(a, b) {
  if (a === b) {
    return 0;
  }

  var x = a.length;
  var y = b.length;

  for (var i = 0, len = Math.min(x, y); i < len; ++i) {
    if (a[i] !== b[i]) {
      x = a[i];
      y = b[i];
      break;
    }
  }

  if (x < y) {
    return -1;
  }
  if (y < x) {
    return 1;
  }
  return 0;
}
function isBuffer(b) {
  if (global.Buffer && typeof global.Buffer.isBuffer === 'function') {
    return global.Buffer.isBuffer(b);
  }
  return !!(b != null && b._isBuffer);
}

// based on node assert, original notice:
// NB: The URL to the CommonJS spec is kept just for tradition.
//     node-assert has evolved a lot since then, both in API and behavior.

// http://wiki.commonjs.org/wiki/Unit_Testing/1.0
//
// THIS IS NOT TESTED NOR LIKELY TO WORK OUTSIDE V8!
//
// Originally from narwhal.js (http://narwhaljs.org)
// Copyright (c) 2009 Thomas Robinson <280north.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the 'Software'), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

var util = require(6);
var hasOwn = Object.prototype.hasOwnProperty;
var pSlice = Array.prototype.slice;
var functionsHaveNames = (function () {
  return function foo() {}.name === 'foo';
}());
function pToString (obj) {
  return Object.prototype.toString.call(obj);
}
function isView(arrbuf) {
  if (isBuffer(arrbuf)) {
    return false;
  }
  if (typeof global.ArrayBuffer !== 'function') {
    return false;
  }
  if (typeof ArrayBuffer.isView === 'function') {
    return ArrayBuffer.isView(arrbuf);
  }
  if (!arrbuf) {
    return false;
  }
  if (arrbuf instanceof DataView) {
    return true;
  }
  if (arrbuf.buffer && arrbuf.buffer instanceof ArrayBuffer) {
    return true;
  }
  return false;
}
// 1. The assert module provides functions that throw
// AssertionError's when particular conditions are not met. The
// assert module must conform to the following interface.

var assert = module.exports = ok;

// 2. The AssertionError is defined in assert.
// new assert.AssertionError({ message: message,
//                             actual: actual,
//                             expected: expected })

var regex = /\s*function\s+([^\(\s]*)\s*/;
// based on https://github.com/ljharb/function.prototype.name/blob/adeeeec8bfcc6068b187d7d9fb3d5bb1d3a30899/implementation.js
function getName(func) {
  if (!util.isFunction(func)) {
    return;
  }
  if (functionsHaveNames) {
    return func.name;
  }
  var str = func.toString();
  var match = str.match(regex);
  return match && match[1];
}
assert.AssertionError = function AssertionError(options) {
  this.name = 'AssertionError';
  this.actual = options.actual;
  this.expected = options.expected;
  this.operator = options.operator;
  if (options.message) {
    this.message = options.message;
    this.generatedMessage = false;
  } else {
    this.message = getMessage(this);
    this.generatedMessage = true;
  }
  var stackStartFunction = options.stackStartFunction || fail;
  if (Error.captureStackTrace) {
    Error.captureStackTrace(this, stackStartFunction);
  } else {
    // non v8 browsers so we can have a stacktrace
    var err = new Error();
    if (err.stack) {
      var out = err.stack;

      // try to strip useless frames
      var fn_name = getName(stackStartFunction);
      var idx = out.indexOf('\n' + fn_name);
      if (idx >= 0) {
        // once we have located the function frame
        // we need to strip out everything before it (and its line)
        var next_line = out.indexOf('\n', idx + 1);
        out = out.substring(next_line + 1);
      }

      this.stack = out;
    }
  }
};

// assert.AssertionError instanceof Error
util.inherits(assert.AssertionError, Error);

function truncate(s, n) {
  if (typeof s === 'string') {
    return s.length < n ? s : s.slice(0, n);
  } else {
    return s;
  }
}
function inspect(something) {
  if (functionsHaveNames || !util.isFunction(something)) {
    return util.inspect(something);
  }
  var rawname = getName(something);
  var name = rawname ? ': ' + rawname : '';
  return '[Function' +  name + ']';
}
function getMessage(self) {
  return truncate(inspect(self.actual), 128) + ' ' +
         self.operator + ' ' +
         truncate(inspect(self.expected), 128);
}

// At present only the three keys mentioned above are used and
// understood by the spec. Implementations or sub modules can pass
// other keys to the AssertionError's constructor - they will be
// ignored.

// 3. All of the following functions must throw an AssertionError
// when a corresponding condition is not met, with a message that
// may be undefined if not provided.  All assertion methods provide
// both the actual and expected values to the assertion error for
// display purposes.

function fail(actual, expected, message, operator, stackStartFunction) {
  throw new assert.AssertionError({
    message: message,
    actual: actual,
    expected: expected,
    operator: operator,
    stackStartFunction: stackStartFunction
  });
}

// EXTENSION! allows for well behaved errors defined elsewhere.
assert.fail = fail;

// 4. Pure assertion tests whether a value is truthy, as determined
// by !!guard.
// assert.ok(guard, message_opt);
// This statement is equivalent to assert.equal(true, !!guard,
// message_opt);. To test strictly for the value true, use
// assert.strictEqual(true, guard, message_opt);.

function ok(value, message) {
  if (!value) fail(value, true, message, '==', assert.ok);
}
assert.ok = ok;

// 5. The equality assertion tests shallow, coercive equality with
// ==.
// assert.equal(actual, expected, message_opt);

assert.equal = function equal(actual, expected, message) {
  if (actual != expected) fail(actual, expected, message, '==', assert.equal);
};

// 6. The non-equality assertion tests for whether two objects are not equal
// with != assert.notEqual(actual, expected, message_opt);

assert.notEqual = function notEqual(actual, expected, message) {
  if (actual == expected) {
    fail(actual, expected, message, '!=', assert.notEqual);
  }
};

// 7. The equivalence assertion tests a deep equality relation.
// assert.deepEqual(actual, expected, message_opt);

assert.deepEqual = function deepEqual(actual, expected, message) {
  if (!_deepEqual(actual, expected, false)) {
    fail(actual, expected, message, 'deepEqual', assert.deepEqual);
  }
};

assert.deepStrictEqual = function deepStrictEqual(actual, expected, message) {
  if (!_deepEqual(actual, expected, true)) {
    fail(actual, expected, message, 'deepStrictEqual', assert.deepStrictEqual);
  }
};

function _deepEqual(actual, expected, strict, memos) {
  // 7.1. All identical values are equivalent, as determined by ===.
  if (actual === expected) {
    return true;
  } else if (isBuffer(actual) && isBuffer(expected)) {
    return compare(actual, expected) === 0;

  // 7.2. If the expected value is a Date object, the actual value is
  // equivalent if it is also a Date object that refers to the same time.
  } else if (util.isDate(actual) && util.isDate(expected)) {
    return actual.getTime() === expected.getTime();

  // 7.3 If the expected value is a RegExp object, the actual value is
  // equivalent if it is also a RegExp object with the same source and
  // properties (`global`, `multiline`, `lastIndex`, `ignoreCase`).
  } else if (util.isRegExp(actual) && util.isRegExp(expected)) {
    return actual.source === expected.source &&
           actual.global === expected.global &&
           actual.multiline === expected.multiline &&
           actual.lastIndex === expected.lastIndex &&
           actual.ignoreCase === expected.ignoreCase;

  // 7.4. Other pairs that do not both pass typeof value == 'object',
  // equivalence is determined by ==.
  } else if ((actual === null || typeof actual !== 'object') &&
             (expected === null || typeof expected !== 'object')) {
    return strict ? actual === expected : actual == expected;

  // If both values are instances of typed arrays, wrap their underlying
  // ArrayBuffers in a Buffer each to increase performance
  // This optimization requires the arrays to have the same type as checked by
  // Object.prototype.toString (aka pToString). Never perform binary
  // comparisons for Float*Arrays, though, since e.g. +0 === -0 but their
  // bit patterns are not identical.
  } else if (isView(actual) && isView(expected) &&
             pToString(actual) === pToString(expected) &&
             !(actual instanceof Float32Array ||
               actual instanceof Float64Array)) {
    return compare(new Uint8Array(actual.buffer),
                   new Uint8Array(expected.buffer)) === 0;

  // 7.5 For all other Object pairs, including Array objects, equivalence is
  // determined by having the same number of owned properties (as verified
  // with Object.prototype.hasOwnProperty.call), the same set of keys
  // (although not necessarily the same order), equivalent values for every
  // corresponding key, and an identical 'prototype' property. Note: this
  // accounts for both named and indexed properties on Arrays.
  } else if (isBuffer(actual) !== isBuffer(expected)) {
    return false;
  } else {
    memos = memos || {actual: [], expected: []};

    var actualIndex = memos.actual.indexOf(actual);
    if (actualIndex !== -1) {
      if (actualIndex === memos.expected.indexOf(expected)) {
        return true;
      }
    }

    memos.actual.push(actual);
    memos.expected.push(expected);

    return objEquiv(actual, expected, strict, memos);
  }
}

function isArguments(object) {
  return Object.prototype.toString.call(object) == '[object Arguments]';
}

function objEquiv(a, b, strict, actualVisitedObjects) {
  if (a === null || a === undefined || b === null || b === undefined)
    return false;
  // if one is a primitive, the other must be same
  if (util.isPrimitive(a) || util.isPrimitive(b))
    return a === b;
  if (strict && Object.getPrototypeOf(a) !== Object.getPrototypeOf(b))
    return false;
  var aIsArgs = isArguments(a);
  var bIsArgs = isArguments(b);
  if ((aIsArgs && !bIsArgs) || (!aIsArgs && bIsArgs))
    return false;
  if (aIsArgs) {
    a = pSlice.call(a);
    b = pSlice.call(b);
    return _deepEqual(a, b, strict);
  }
  var ka = objectKeys(a);
  var kb = objectKeys(b);
  var key, i;
  // having the same number of owned properties (keys incorporates
  // hasOwnProperty)
  if (ka.length !== kb.length)
    return false;
  //the same set of keys (although not necessarily the same order),
  ka.sort();
  kb.sort();
  //~~~cheap key test
  for (i = ka.length - 1; i >= 0; i--) {
    if (ka[i] !== kb[i])
      return false;
  }
  //equivalent values for every corresponding key, and
  //~~~possibly expensive deep test
  for (i = ka.length - 1; i >= 0; i--) {
    key = ka[i];
    if (!_deepEqual(a[key], b[key], strict, actualVisitedObjects))
      return false;
  }
  return true;
}

// 8. The non-equivalence assertion tests for any deep inequality.
// assert.notDeepEqual(actual, expected, message_opt);

assert.notDeepEqual = function notDeepEqual(actual, expected, message) {
  if (_deepEqual(actual, expected, false)) {
    fail(actual, expected, message, 'notDeepEqual', assert.notDeepEqual);
  }
};

assert.notDeepStrictEqual = notDeepStrictEqual;
function notDeepStrictEqual(actual, expected, message) {
  if (_deepEqual(actual, expected, true)) {
    fail(actual, expected, message, 'notDeepStrictEqual', notDeepStrictEqual);
  }
}


// 9. The strict equality assertion tests strict equality, as determined by ===.
// assert.strictEqual(actual, expected, message_opt);

assert.strictEqual = function strictEqual(actual, expected, message) {
  if (actual !== expected) {
    fail(actual, expected, message, '===', assert.strictEqual);
  }
};

// 10. The strict non-equality assertion tests for strict inequality, as
// determined by !==.  assert.notStrictEqual(actual, expected, message_opt);

assert.notStrictEqual = function notStrictEqual(actual, expected, message) {
  if (actual === expected) {
    fail(actual, expected, message, '!==', assert.notStrictEqual);
  }
};

function expectedException(actual, expected) {
  if (!actual || !expected) {
    return false;
  }

  if (Object.prototype.toString.call(expected) == '[object RegExp]') {
    return expected.test(actual);
  }

  try {
    if (actual instanceof expected) {
      return true;
    }
  } catch (e) {
    // Ignore.  The instanceof check doesn't work for arrow functions.
  }

  if (Error.isPrototypeOf(expected)) {
    return false;
  }

  return expected.call({}, actual) === true;
}

function _tryBlock(block) {
  var error;
  try {
    block();
  } catch (e) {
    error = e;
  }
  return error;
}

function _throws(shouldThrow, block, expected, message) {
  var actual;

  if (typeof block !== 'function') {
    throw new TypeError('"block" argument must be a function');
  }

  if (typeof expected === 'string') {
    message = expected;
    expected = null;
  }

  actual = _tryBlock(block);

  message = (expected && expected.name ? ' (' + expected.name + ').' : '.') +
            (message ? ' ' + message : '.');

  if (shouldThrow && !actual) {
    fail(actual, expected, 'Missing expected exception' + message);
  }

  var userProvidedMessage = typeof message === 'string';
  var isUnwantedException = !shouldThrow && util.isError(actual);
  var isUnexpectedException = !shouldThrow && actual && !expected;

  if ((isUnwantedException &&
      userProvidedMessage &&
      expectedException(actual, expected)) ||
      isUnexpectedException) {
    fail(actual, expected, 'Got unwanted exception' + message);
  }

  if ((shouldThrow && actual && expected &&
      !expectedException(actual, expected)) || (!shouldThrow && actual)) {
    throw actual;
  }
}

// 11. Expected to throw an error:
// assert.throws(block, Error_opt, message_opt);

assert.throws = function(block, /*optional*/error, /*optional*/message) {
  _throws(true, block, error, message);
};

// EXTENSION! This is annoying to write outside this module.
assert.doesNotThrow = function(block, /*optional*/error, /*optional*/message) {
  _throws(false, block, error, message);
};

assert.ifError = function(err) { if (err) throw err; };

// Expose a strict only variant of assert
function strict(value, message) {
  if (!value) fail(value, true, message, '==', strict);
}
assert.strict = objectAssign(strict, assert, {
  equal: assert.strictEqual,
  deepEqual: assert.deepStrictEqual,
  notEqual: assert.notStrictEqual,
  notDeepEqual: assert.notDeepStrictEqual
});
assert.strict.strict = assert.strict;

var objectKeys = Object.keys || function (obj) {
  var keys = [];
  for (var key in obj) {
    if (hasOwn.call(obj, key)) keys.push(key);
  }
  return keys;
};

}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"20":20,"6":6}],4:[function(require,module,exports){
if (typeof Object.create === 'function') {
  // implementation from standard node.js 'util' module
  module.exports = function inherits(ctor, superCtor) {
    ctor.super_ = superCtor
    ctor.prototype = Object.create(superCtor.prototype, {
      constructor: {
        value: ctor,
        enumerable: false,
        writable: true,
        configurable: true
      }
    });
  };
} else {
  // old school shim for old browsers
  module.exports = function inherits(ctor, superCtor) {
    ctor.super_ = superCtor
    var TempCtor = function () {}
    TempCtor.prototype = superCtor.prototype
    ctor.prototype = new TempCtor()
    ctor.prototype.constructor = ctor
  }
}

},{}],5:[function(require,module,exports){
module.exports = function isBuffer(arg) {
  return arg && typeof arg === 'object'
    && typeof arg.copy === 'function'
    && typeof arg.fill === 'function'
    && typeof arg.readUInt8 === 'function';
}
},{}],6:[function(require,module,exports){
(function (process,global){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

var formatRegExp = /%[sdj%]/g;
exports.format = function(f) {
  if (!isString(f)) {
    var objects = [];
    for (var i = 0; i < arguments.length; i++) {
      objects.push(inspect(arguments[i]));
    }
    return objects.join(' ');
  }

  var i = 1;
  var args = arguments;
  var len = args.length;
  var str = String(f).replace(formatRegExp, function(x) {
    if (x === '%%') return '%';
    if (i >= len) return x;
    switch (x) {
      case '%s': return String(args[i++]);
      case '%d': return Number(args[i++]);
      case '%j':
        try {
          return JSON.stringify(args[i++]);
        } catch (_) {
          return '[Circular]';
        }
      default:
        return x;
    }
  });
  for (var x = args[i]; i < len; x = args[++i]) {
    if (isNull(x) || !isObject(x)) {
      str += ' ' + x;
    } else {
      str += ' ' + inspect(x);
    }
  }
  return str;
};


// Mark that a method should not be used.
// Returns a modified function which warns once by default.
// If --no-deprecation is set, then it is a no-op.
exports.deprecate = function(fn, msg) {
  // Allow for deprecating things in the process of starting up.
  if (isUndefined(global.process)) {
    return function() {
      return exports.deprecate(fn, msg).apply(this, arguments);
    };
  }

  if (process.noDeprecation === true) {
    return fn;
  }

  var warned = false;
  function deprecated() {
    if (!warned) {
      if (process.throwDeprecation) {
        throw new Error(msg);
      } else if (process.traceDeprecation) {
        console.trace(msg);
      } else {
        console.error(msg);
      }
      warned = true;
    }
    return fn.apply(this, arguments);
  }

  return deprecated;
};


var debugs = {};
var debugEnviron;
exports.debuglog = function(set) {
  if (isUndefined(debugEnviron))
    debugEnviron = process.env.NODE_DEBUG || '';
  set = set.toUpperCase();
  if (!debugs[set]) {
    if (new RegExp('\\b' + set + '\\b', 'i').test(debugEnviron)) {
      var pid = process.pid;
      debugs[set] = function() {
        var msg = exports.format.apply(exports, arguments);
        console.error('%s %d: %s', set, pid, msg);
      };
    } else {
      debugs[set] = function() {};
    }
  }
  return debugs[set];
};


/**
 * Echos the value of a value. Trys to print the value out
 * in the best way possible given the different types.
 *
 * @param {Object} obj The object to print out.
 * @param {Object} opts Optional options object that alters the output.
 */
/* legacy: obj, showHidden, depth, colors*/
function inspect(obj, opts) {
  // default options
  var ctx = {
    seen: [],
    stylize: stylizeNoColor
  };
  // legacy...
  if (arguments.length >= 3) ctx.depth = arguments[2];
  if (arguments.length >= 4) ctx.colors = arguments[3];
  if (isBoolean(opts)) {
    // legacy...
    ctx.showHidden = opts;
  } else if (opts) {
    // got an "options" object
    exports._extend(ctx, opts);
  }
  // set default options
  if (isUndefined(ctx.showHidden)) ctx.showHidden = false;
  if (isUndefined(ctx.depth)) ctx.depth = 2;
  if (isUndefined(ctx.colors)) ctx.colors = false;
  if (isUndefined(ctx.customInspect)) ctx.customInspect = true;
  if (ctx.colors) ctx.stylize = stylizeWithColor;
  return formatValue(ctx, obj, ctx.depth);
}
exports.inspect = inspect;


// http://en.wikipedia.org/wiki/ANSI_escape_code#graphics
inspect.colors = {
  'bold' : [1, 22],
  'italic' : [3, 23],
  'underline' : [4, 24],
  'inverse' : [7, 27],
  'white' : [37, 39],
  'grey' : [90, 39],
  'black' : [30, 39],
  'blue' : [34, 39],
  'cyan' : [36, 39],
  'green' : [32, 39],
  'magenta' : [35, 39],
  'red' : [31, 39],
  'yellow' : [33, 39]
};

// Don't use 'blue' not visible on cmd.exe
inspect.styles = {
  'special': 'cyan',
  'number': 'yellow',
  'boolean': 'yellow',
  'undefined': 'grey',
  'null': 'bold',
  'string': 'green',
  'date': 'magenta',
  // "name": intentionally not styling
  'regexp': 'red'
};


function stylizeWithColor(str, styleType) {
  var style = inspect.styles[styleType];

  if (style) {
    return '\u001b[' + inspect.colors[style][0] + 'm' + str +
           '\u001b[' + inspect.colors[style][1] + 'm';
  } else {
    return str;
  }
}


function stylizeNoColor(str, styleType) {
  return str;
}


function arrayToHash(array) {
  var hash = {};

  array.forEach(function(val, idx) {
    hash[val] = true;
  });

  return hash;
}


function formatValue(ctx, value, recurseTimes) {
  // Provide a hook for user-specified inspect functions.
  // Check that value is an object with an inspect function on it
  if (ctx.customInspect &&
      value &&
      isFunction(value.inspect) &&
      // Filter out the util module, it's inspect function is special
      value.inspect !== exports.inspect &&
      // Also filter out any prototype objects using the circular check.
      !(value.constructor && value.constructor.prototype === value)) {
    var ret = value.inspect(recurseTimes, ctx);
    if (!isString(ret)) {
      ret = formatValue(ctx, ret, recurseTimes);
    }
    return ret;
  }

  // Primitive types cannot have properties
  var primitive = formatPrimitive(ctx, value);
  if (primitive) {
    return primitive;
  }

  // Look up the keys of the object.
  var keys = Object.keys(value);
  var visibleKeys = arrayToHash(keys);

  if (ctx.showHidden) {
    keys = Object.getOwnPropertyNames(value);
  }

  // IE doesn't make error fields non-enumerable
  // http://msdn.microsoft.com/en-us/library/ie/dww52sbt(v=vs.94).aspx
  if (isError(value)
      && (keys.indexOf('message') >= 0 || keys.indexOf('description') >= 0)) {
    return formatError(value);
  }

  // Some type of object without properties can be shortcutted.
  if (keys.length === 0) {
    if (isFunction(value)) {
      var name = value.name ? ': ' + value.name : '';
      return ctx.stylize('[Function' + name + ']', 'special');
    }
    if (isRegExp(value)) {
      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
    }
    if (isDate(value)) {
      return ctx.stylize(Date.prototype.toString.call(value), 'date');
    }
    if (isError(value)) {
      return formatError(value);
    }
  }

  var base = '', array = false, braces = ['{', '}'];

  // Make Array say that they are Array
  if (isArray(value)) {
    array = true;
    braces = ['[', ']'];
  }

  // Make functions say that they are functions
  if (isFunction(value)) {
    var n = value.name ? ': ' + value.name : '';
    base = ' [Function' + n + ']';
  }

  // Make RegExps say that they are RegExps
  if (isRegExp(value)) {
    base = ' ' + RegExp.prototype.toString.call(value);
  }

  // Make dates with properties first say the date
  if (isDate(value)) {
    base = ' ' + Date.prototype.toUTCString.call(value);
  }

  // Make error with message first say the error
  if (isError(value)) {
    base = ' ' + formatError(value);
  }

  if (keys.length === 0 && (!array || value.length == 0)) {
    return braces[0] + base + braces[1];
  }

  if (recurseTimes < 0) {
    if (isRegExp(value)) {
      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
    } else {
      return ctx.stylize('[Object]', 'special');
    }
  }

  ctx.seen.push(value);

  var output;
  if (array) {
    output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);
  } else {
    output = keys.map(function(key) {
      return formatProperty(ctx, value, recurseTimes, visibleKeys, key, array);
    });
  }

  ctx.seen.pop();

  return reduceToSingleString(output, base, braces);
}


function formatPrimitive(ctx, value) {
  if (isUndefined(value))
    return ctx.stylize('undefined', 'undefined');
  if (isString(value)) {
    var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '')
                                             .replace(/'/g, "\\'")
                                             .replace(/\\"/g, '"') + '\'';
    return ctx.stylize(simple, 'string');
  }
  if (isNumber(value))
    return ctx.stylize('' + value, 'number');
  if (isBoolean(value))
    return ctx.stylize('' + value, 'boolean');
  // For some reason typeof null is "object", so special case here.
  if (isNull(value))
    return ctx.stylize('null', 'null');
}


function formatError(value) {
  return '[' + Error.prototype.toString.call(value) + ']';
}


function formatArray(ctx, value, recurseTimes, visibleKeys, keys) {
  var output = [];
  for (var i = 0, l = value.length; i < l; ++i) {
    if (hasOwnProperty(value, String(i))) {
      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
          String(i), true));
    } else {
      output.push('');
    }
  }
  keys.forEach(function(key) {
    if (!key.match(/^\d+$/)) {
      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
          key, true));
    }
  });
  return output;
}


function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {
  var name, str, desc;
  desc = Object.getOwnPropertyDescriptor(value, key) || { value: value[key] };
  if (desc.get) {
    if (desc.set) {
      str = ctx.stylize('[Getter/Setter]', 'special');
    } else {
      str = ctx.stylize('[Getter]', 'special');
    }
  } else {
    if (desc.set) {
      str = ctx.stylize('[Setter]', 'special');
    }
  }
  if (!hasOwnProperty(visibleKeys, key)) {
    name = '[' + key + ']';
  }
  if (!str) {
    if (ctx.seen.indexOf(desc.value) < 0) {
      if (isNull(recurseTimes)) {
        str = formatValue(ctx, desc.value, null);
      } else {
        str = formatValue(ctx, desc.value, recurseTimes - 1);
      }
      if (str.indexOf('\n') > -1) {
        if (array) {
          str = str.split('\n').map(function(line) {
            return '  ' + line;
          }).join('\n').substr(2);
        } else {
          str = '\n' + str.split('\n').map(function(line) {
            return '   ' + line;
          }).join('\n');
        }
      }
    } else {
      str = ctx.stylize('[Circular]', 'special');
    }
  }
  if (isUndefined(name)) {
    if (array && key.match(/^\d+$/)) {
      return str;
    }
    name = JSON.stringify('' + key);
    if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
      name = name.substr(1, name.length - 2);
      name = ctx.stylize(name, 'name');
    } else {
      name = name.replace(/'/g, "\\'")
                 .replace(/\\"/g, '"')
                 .replace(/(^"|"$)/g, "'");
      name = ctx.stylize(name, 'string');
    }
  }

  return name + ': ' + str;
}


function reduceToSingleString(output, base, braces) {
  var numLinesEst = 0;
  var length = output.reduce(function(prev, cur) {
    numLinesEst++;
    if (cur.indexOf('\n') >= 0) numLinesEst++;
    return prev + cur.replace(/\u001b\[\d\d?m/g, '').length + 1;
  }, 0);

  if (length > 60) {
    return braces[0] +
           (base === '' ? '' : base + '\n ') +
           ' ' +
           output.join(',\n  ') +
           ' ' +
           braces[1];
  }

  return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];
}


// NOTE: These type checking functions intentionally don't use `instanceof`
// because it is fragile and can be easily faked with `Object.create()`.
function isArray(ar) {
  return Array.isArray(ar);
}
exports.isArray = isArray;

function isBoolean(arg) {
  return typeof arg === 'boolean';
}
exports.isBoolean = isBoolean;

function isNull(arg) {
  return arg === null;
}
exports.isNull = isNull;

function isNullOrUndefined(arg) {
  return arg == null;
}
exports.isNullOrUndefined = isNullOrUndefined;

function isNumber(arg) {
  return typeof arg === 'number';
}
exports.isNumber = isNumber;

function isString(arg) {
  return typeof arg === 'string';
}
exports.isString = isString;

function isSymbol(arg) {
  return typeof arg === 'symbol';
}
exports.isSymbol = isSymbol;

function isUndefined(arg) {
  return arg === void 0;
}
exports.isUndefined = isUndefined;

function isRegExp(re) {
  return isObject(re) && objectToString(re) === '[object RegExp]';
}
exports.isRegExp = isRegExp;

function isObject(arg) {
  return typeof arg === 'object' && arg !== null;
}
exports.isObject = isObject;

function isDate(d) {
  return isObject(d) && objectToString(d) === '[object Date]';
}
exports.isDate = isDate;

function isError(e) {
  return isObject(e) &&
      (objectToString(e) === '[object Error]' || e instanceof Error);
}
exports.isError = isError;

function isFunction(arg) {
  return typeof arg === 'function';
}
exports.isFunction = isFunction;

function isPrimitive(arg) {
  return arg === null ||
         typeof arg === 'boolean' ||
         typeof arg === 'number' ||
         typeof arg === 'string' ||
         typeof arg === 'symbol' ||  // ES6 symbol
         typeof arg === 'undefined';
}
exports.isPrimitive = isPrimitive;

exports.isBuffer = require(5);

function objectToString(o) {
  return Object.prototype.toString.call(o);
}


function pad(n) {
  return n < 10 ? '0' + n.toString(10) : n.toString(10);
}


var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep',
              'Oct', 'Nov', 'Dec'];

// 26 Feb 16:19:34
function timestamp() {
  var d = new Date();
  var time = [pad(d.getHours()),
              pad(d.getMinutes()),
              pad(d.getSeconds())].join(':');
  return [d.getDate(), months[d.getMonth()], time].join(' ');
}


// log is just a thin wrapper to console.log that prepends a timestamp
exports.log = function() {
  console.log('%s - %s', timestamp(), exports.format.apply(exports, arguments));
};


/**
 * Inherit the prototype methods from one constructor into another.
 *
 * The Function.prototype.inherits from lang.js rewritten as a standalone
 * function (not on Function.prototype). NOTE: If this file is to be loaded
 * during bootstrapping this function needs to be rewritten using some native
 * functions as prototype setup using normal JavaScript does not work as
 * expected during bootstrapping (see mirror.js in r114903).
 *
 * @param {function} ctor Constructor function which needs to inherit the
 *     prototype.
 * @param {function} superCtor Constructor function to inherit prototype from.
 */
exports.inherits = require(4);

exports._extend = function(origin, add) {
  // Don't do anything if add isn't an object
  if (!add || !isObject(add)) return origin;

  var keys = Object.keys(add);
  var i = keys.length;
  while (i--) {
    origin[keys[i]] = add[keys[i]];
  }
  return origin;
};

function hasOwnProperty(obj, prop) {
  return Object.prototype.hasOwnProperty.call(obj, prop);
}

}).call(this,require(21),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"21":21,"4":4,"5":5}],7:[function(require,module,exports){
'use strict'

module.exports = ready

function ready (callback) {
  if (typeof document === 'undefined') {
    throw new Error('document-ready only runs in the browser')
  }
  var state = document.readyState
  if (state === 'complete' || state === 'interactive') {
    return setTimeout(callback, 0)
  }

  document.addEventListener('DOMContentLoaded', function onLoad () {
    callback()
  })
}

},{}],8:[function(require,module,exports){
assert.notEqual = notEqual
assert.notOk = notOk
assert.equal = equal
assert.ok = assert

module.exports = assert

function equal (a, b, m) {
  assert(a == b, m) // eslint-disable-line eqeqeq
}

function notEqual (a, b, m) {
  assert(a != b, m) // eslint-disable-line eqeqeq
}

function notOk (t, m) {
  assert(!t, m)
}

function assert (t, m) {
  if (!t) throw new Error(m || 'AssertionError')
}

},{}],9:[function(require,module,exports){
var splice = require(22)
var nanotiming = require(19)
var assert = require(8)

module.exports = Nanobus

function Nanobus (name) {
  if (!(this instanceof Nanobus)) return new Nanobus(name)

  this._name = name || 'nanobus'
  this._starListeners = []
  this._listeners = {}
}

Nanobus.prototype.emit = function (eventName) {
  assert.ok(typeof eventName === 'string' || typeof eventName === 'symbol', 'nanobus.emit: eventName should be type string or symbol')

  var data = []
  for (var i = 1, len = arguments.length; i < len; i++) {
    data.push(arguments[i])
  }

  var emitTiming = nanotiming(this._name + "('" + eventName.toString() + "')")
  var listeners = this._listeners[eventName]
  if (listeners && listeners.length > 0) {
    this._emit(this._listeners[eventName], data)
  }

  if (this._starListeners.length > 0) {
    this._emit(this._starListeners, eventName, data, emitTiming.uuid)
  }
  emitTiming()

  return this
}

Nanobus.prototype.on = Nanobus.prototype.addListener = function (eventName, listener) {
  assert.ok(typeof eventName === 'string' || typeof eventName === 'symbol', 'nanobus.on: eventName should be type string or symbol')
  assert.equal(typeof listener, 'function', 'nanobus.on: listener should be type function')

  if (eventName === '*') {
    this._starListeners.push(listener)
  } else {
    if (!this._listeners[eventName]) this._listeners[eventName] = []
    this._listeners[eventName].push(listener)
  }
  return this
}

Nanobus.prototype.prependListener = function (eventName, listener) {
  assert.ok(typeof eventName === 'string' || typeof eventName === 'symbol', 'nanobus.prependListener: eventName should be type string or symbol')
  assert.equal(typeof listener, 'function', 'nanobus.prependListener: listener should be type function')

  if (eventName === '*') {
    this._starListeners.unshift(listener)
  } else {
    if (!this._listeners[eventName]) this._listeners[eventName] = []
    this._listeners[eventName].unshift(listener)
  }
  return this
}

Nanobus.prototype.once = function (eventName, listener) {
  assert.ok(typeof eventName === 'string' || typeof eventName === 'symbol', 'nanobus.once: eventName should be type string or symbol')
  assert.equal(typeof listener, 'function', 'nanobus.once: listener should be type function')

  var self = this
  this.on(eventName, once)
  function once () {
    listener.apply(self, arguments)
    self.removeListener(eventName, once)
  }
  return this
}

Nanobus.prototype.prependOnceListener = function (eventName, listener) {
  assert.ok(typeof eventName === 'string' || typeof eventName === 'symbol', 'nanobus.prependOnceListener: eventName should be type string or symbol')
  assert.equal(typeof listener, 'function', 'nanobus.prependOnceListener: listener should be type function')

  var self = this
  this.prependListener(eventName, once)
  function once () {
    listener.apply(self, arguments)
    self.removeListener(eventName, once)
  }
  return this
}

Nanobus.prototype.removeListener = function (eventName, listener) {
  assert.ok(typeof eventName === 'string' || typeof eventName === 'symbol', 'nanobus.removeListener: eventName should be type string or symbol')
  assert.equal(typeof listener, 'function', 'nanobus.removeListener: listener should be type function')

  if (eventName === '*') {
    this._starListeners = this._starListeners.slice()
    return remove(this._starListeners, listener)
  } else {
    if (typeof this._listeners[eventName] !== 'undefined') {
      this._listeners[eventName] = this._listeners[eventName].slice()
    }

    return remove(this._listeners[eventName], listener)
  }

  function remove (arr, listener) {
    if (!arr) return
    var index = arr.indexOf(listener)
    if (index !== -1) {
      splice(arr, index, 1)
      return true
    }
  }
}

Nanobus.prototype.removeAllListeners = function (eventName) {
  if (eventName) {
    if (eventName === '*') {
      this._starListeners = []
    } else {
      this._listeners[eventName] = []
    }
  } else {
    this._starListeners = []
    this._listeners = {}
  }
  return this
}

Nanobus.prototype.listeners = function (eventName) {
  var listeners = eventName !== '*'
    ? this._listeners[eventName]
    : this._starListeners

  var ret = []
  if (listeners) {
    var ilength = listeners.length
    for (var i = 0; i < ilength; i++) ret.push(listeners[i])
  }
  return ret
}

Nanobus.prototype._emit = function (arr, eventName, data, uuid) {
  if (typeof arr === 'undefined