From c3e4ab5add287882b5f85fd7bf7920a8d2b5bc88 Mon Sep 17 00:00:00 2001
From: Vincent Giersch <vincent@giersch.fr>
Date: Mon, 13 May 2019 20:10:14 +0200
Subject: [PATCH] feat: support for MIDI

---
 CHANGELOG.md          | 4 ++++
 README.md             | 4 ++--
 dist/embed.js         | 3 ++-
 dist/embed.js.map     | 2 +-
 dist/embed.min.js     | 4 ++--
 dist/embed.min.js.map | 2 +-
 package.json          | 2 +-
 src/lib/embed.js      | 1 +
 8 files changed, 14 insertions(+), 8 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index be12346..3aa5225 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## v1.1.0
+
+* Support for MIDI Output
+
 ## v1.0.0
 
 * Host on our CDN (`https://prod.flat-cdn.com/embed-js/${VERSION}/embed.min.js`)
diff --git a/README.md b/README.md
index c6c9130..ab792e4 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ yarn add flat-embed
 Or use the latest version hosted on our CDN:
 
 ```html
-<script src="https://prod.flat-cdn.com/embed-js/v1.0.0/embed.min.js"></script>
+<script src="https://prod.flat-cdn.com/embed-js/v1.1.0/embed.min.js"></script>
 ```
 
 ## Getting Started
@@ -31,7 +31,7 @@ The simplest way to get started is to pass a DOM element to our embed that will
 
 ```html
 <div id="embed-container"></div>
-<script src="https://prod.flat-cdn.com/embed-js/v1.0.0/embed.min.js"></script>
+<script src="https://prod.flat-cdn.com/embed-js/v1.1.0/embed.min.js"></script>
 <script>
   var container = document.getElementById('embed-container');
   var embed = new Flat.Embed(container, {
diff --git a/dist/embed.js b/dist/embed.js
index 1a4eaa7..57d5484 100644
--- a/dist/embed.js
+++ b/dist/embed.js
@@ -1,4 +1,4 @@
-/*! flat-embed v1.0.0 | (c) 2019 Tutteo Ltd. (Flat) | Apache-2.0 License | https://github.com/FlatIO/embed-client */
+/*! flat-embed v1.1.0 | (c) 2019 Tutteo Ltd. (Flat) | Apache-2.0 License | https://github.com/FlatIO/embed-client */
 (function (global, factory) {
   typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
   typeof define === 'function' && define.amd ? define(factory) :
@@ -111,6 +111,7 @@
     iframe.setAttribute('width', parameters.width || '100%');
     iframe.setAttribute('height', parameters.height || '100%');
     iframe.setAttribute('allowfullscreen', true);
+    iframe.setAttribute('allow', 'midi');
     iframe.setAttribute('frameborder', '0');
     element.appendChild(iframe);
     return iframe;
diff --git a/dist/embed.js.map b/dist/embed.js.map
index da7ed4b..ef47eea 100644
--- a/dist/embed.js.map
+++ b/dist/embed.js.map
@@ -1 +1 @@
-{"version":3,"file":"embed.js","sources":["src/lib/compatibility.js","src/lib/dom.js","src/lib/embed.js","src/lib/communication.js","src/lib/callback.js","src/embed.js"],"sourcesContent":["if (typeof window.postMessage === 'undefined') {\n  throw new Error('The Flat Embed JS API is not supported in this browser');\n}\n","/**\n * Select and normalize the DOM element input\n *\n * @param {(HTMLIFrameElement|HTMLElement|string|jQuery)} element\n * @return {(HTMLIFrameElement|HTMLElement)}\n */\nexport function normalizeElement(element) {\n  if (window.jQuery && element instanceof window.jQuery) {\n    element = element[0];\n  }\n\n  // Find an element by identifier\n  if (typeof element === 'string') {\n    element = document.getElementById(element);\n  }\n\n  // Check if a DOM element\n  if (!(element instanceof window.HTMLElement)) {\n    throw new TypeError('The first parameter must be an existing DOM element or an identifier.');\n  }\n\n  // The element is not an embed iframe?\n  if (element.nodeName !== 'IFRAME') {\n    // check if already present in the element\n    const iframe = element.querySelector('iframe');\n    if (iframe) {\n      element = iframe;\n    }\n  }\n\n  return element;\n}\n","/**\n * Build url for the new iframe\n *\n * @param {object} parameters\n */\nexport function buildIframeUrl(parameters) {\n  let url = (parameters.baseUrl || 'https://flat-embed.com');\n\n  // Score id or blank embed\n  url += '/' + (parameters.score || 'blank');\n\n  // Build qs parameters\n  let urlParameters = Object.assign({\n    jsapi: true\n  }, parameters.embedParams);\n\n  let qs = Object.keys(urlParameters)\n    .map(k => `${encodeURIComponent(k)}=${encodeURIComponent(urlParameters[k])}`)\n    .join('&');\n\n  return url + '?' + qs;\n}\n\n/**\n * Create an iframe inside a specified element\n *\n * @param {HTMLElement} element\n * @param {object} parameters\n */\nexport function createEmbedIframe(element, parameters) {\n  let url = buildIframeUrl(parameters);\n\n  var iframe = document.createElement('iframe');\n  iframe.setAttribute('src', url);\n  iframe.setAttribute('width', parameters.width || '100%');\n  iframe.setAttribute('height', parameters.height || '100%');\n  iframe.setAttribute('allowfullscreen', true);\n  iframe.setAttribute('frameborder', '0');\n\n  element.appendChild(iframe);\n\n  return iframe;\n}\n","/**\n * Send a message to the embed via postMessage\n *\n * @param {Embed} embed\n * @param {string} method The name of the method to call\n * @param {string} parameters The parameters to pass to the method\n */\nexport function postMessage(embed, method, parameters) {\n  if (!embed.element.contentWindow || !embed.element.contentWindow.postMessage) {\n    throw new Error('No `contentWindow` or `contentWindow.postMessage` avaialble on the element');\n  }\n\n  let message = {\n    method,\n    parameters\n  };\n\n  embed.element.contentWindow.postMessage(message, embed.origin);\n}\n\n/**\n * Parse a message received from postMessage\n *\n * @param {string|object} data The data received from postMessage\n * @return {object}\n */\nexport function parseMessage(data) {\n  if (typeof data === 'string') {\n    data = JSON.parse(data);\n  }\n  return data;\n}\n","\nclass EmbedCallback {\n  constructor(embed) {\n    this.embed = embed;\n    this.promises = {};\n    this.eventCallbacks = {};\n    return this;\n  }\n\n  pushCall(name, resolve, reject) {\n    this.promises[name] = this.promises[name] || [];\n    this.promises[name].push({resolve, reject});\n  }\n\n  /**\n   * Register a callback for a specified event\n   *\n   * @param {string} event The name of the event.\n   * @param {function} callback The function to call when receiving an event\n   * @return {boolen} `true` if it is the first subscriber, `false otherwise`\n   */\n  subscribeEvent(event, callback) {\n    this.eventCallbacks[event] = this.eventCallbacks[event] || [];\n    this.eventCallbacks[event].push(callback);\n    return this.eventCallbacks[event].length === 1;\n  }\n\n  /**\n   * Unregister a callback for a specified event\n   *\n   * @param {string} event The name of the event.\n   * @param {function} [callback] The function to call when receiving an event\n   * @return {boolen} `true` if it is the last subscriber, `false otherwise`\n   */\n  unsubscribeEvent(event, callback) {\n    // Was not subscribed\n    if (!this.eventCallbacks[event]) {\n      return false;\n    }\n\n    // If a callback is specified, unsub this one\n    if (callback) {\n      let idx = this.eventCallbacks[event].indexOf(callback);\n      if (idx >= 0) {\n        this.eventCallbacks[event].splice(idx, 1);\n      }\n    }\n    // Unsub all\n    else {\n      this.eventCallbacks[event] = [];\n    }\n\n    return !callback || this.eventCallbacks[event].length === 0;\n  }\n\n  /**\n   * Process a message received from postMessage\n   *\n   * @param {object} data The data received from postMessage\n   */\n  process(data) {\n    if (data.method) {\n      this.processMethodResponse(data);\n    }\n    else if (data.event) {\n      this.processEvent(data);\n    }\n  }\n\n  /**\n   * Process a method response\n   *\n   * @param {object} data The data received from postMessage\n   */\n  processMethodResponse(data) {\n    if (!this.promises[data.method]) {\n      return;\n    }\n    var promise = this.promises[data.method].shift();\n    if (!promise) {\n      return;\n    }\n    if (data.error) {\n      promise.reject(data.error);\n    }\n    else {\n      promise.resolve(data.response);\n    }\n  }\n\n  /**\n   * Process a receieved event\n   *\n   * @param {object} data The data received from postMessage\n   */\n  processEvent(data) {\n    if (!this.eventCallbacks[data.event] ||\n        this.eventCallbacks[data.event].length === 0) {\n      return;\n    }\n    this.eventCallbacks[data.event].forEach((callback) => {\n      callback.call(this.embed, data.parameters);\n    });\n  }\n}\n\nexport default EmbedCallback;\n","import './lib/compatibility';\n\nimport { normalizeElement } from './lib/dom';\nimport { createEmbedIframe } from './lib/embed';\nimport { postMessage, parseMessage } from './lib/communication';\nimport EmbedCallback from './lib/callback';\n\nconst embeds = new WeakMap();\nconst embedsReady = new WeakMap();\n\nclass Embed {\n  /**\n   * Create a new Flat Embed\n   *\n   * @param {(HTMLIFrameElement|HTMLElement|string|jQuery)} element A reference to a Flat Embed iframe or a container for the new iframe\n   * @param {object} [params] Parameters for the new iframe\n   * @return {Embed}\n   */\n  constructor(element, params = {}) {\n    element = normalizeElement(element);\n\n    // Keep a single object instance per iframe\n    if (embeds.has(element)) {\n      return embeds.get(element);\n    }\n\n    // Create new element iframe if needed\n    if (element.nodeName !== 'IFRAME') {\n      element = createEmbedIframe(element, params);\n    }\n\n    this.origin = '*';\n    this.element = element;\n    this.embedCallback = new EmbedCallback();\n\n    const onReady = new Promise((resolve) => {\n      // Handle incoming messages from embed\n      const onMessage = (event) => {\n        if (element.contentWindow !== event.source) {\n          return;\n        }\n\n        if (this.origin === '*') {\n          this.origin = event.origin;\n        }\n\n        // Parse inbound message\n        const data = parseMessage(event.data);\n\n        // Mark the embed as ready\n        if (data.event === 'ready' || data.method === 'ping') {\n          resolve();\n          return;\n        }\n\n        // Process regular messages from the embed\n        this.embedCallback.process(data);\n      };\n\n      window.addEventListener('message', onMessage, false);\n      postMessage(this, 'ping');\n    });\n\n    embeds.set(this.element, this);\n    embedsReady.set(this, onReady);\n\n    return this;\n  }\n\n  ready() {\n    return Promise.resolve(embedsReady.get(this));\n  }\n\n  call(method, parameters={}) {\n    return new Promise((resolve, reject) => {\n      return this.ready().then(() => {\n        this.embedCallback.pushCall(method, resolve, reject);\n        postMessage(this, method, parameters);\n      });\n    });\n  }\n\n  /**\n   * Subscribe to a specific event\n   *\n   * @param {string} event The name of the event.\n   * @param {function} callback The function to call when receiving an event\n   */\n  on(event, callback) {\n    if (typeof event !== 'string') {\n      throw new TypeError('An event name (string) is required');\n    }\n    if (typeof callback !== 'function') {\n      throw new TypeError('An callback (function) is required');\n    }\n    if (this.embedCallback.subscribeEvent(event, callback)) {\n      this.call('addEventListener', event).catch(() => {});\n    }\n  }\n\n  /**\n   * Unsubscribe to a specific event\n   *\n   * @param {string} event The name of the event.\n   * @param {function} [callback] The function to unsubscribe\n   */\n  off(event, callback) {\n    if (typeof event !== 'string') {\n      throw new TypeError('An event name (string) is required');\n    }\n    if (this.embedCallback.unsubscribeEvent(event, callback)) {\n      this.call('removeEventListener', event).catch(() => {});\n    }\n  }\n\n  /**\n   * Load a score hosted on Flat\n   *\n   * @param {string} score The unique identifier of the score\n   * @param {string} [revision] The unique identifier of the revision\n   * @return {Promise}\n   * @reject {ApiError} Unable to load the score\n   */\n  loadFlatScore(score, revision) {\n    return this.call('loadFlatScore', {score, revision});\n  }\n\n  /**\n   * Load a MusicXML score\n   *\n   * @param {string} score The MusicXML file\n   * @return {Promise}\n   * @reject {Error} Unable to load the score\n   */\n  loadMusicXML(score) {\n    return this.call('loadMusicXML', score);\n  }\n\n  /**\n   * Load a Flat JSON score\n   *\n   * @param {object|string} score The JSON of the score\n   * @return {Promise}\n   * @reject {Error} Unable to load the score\n   */\n  loadJSON(score) {\n    return this.call('loadJSON', score);\n  }\n\n  /**\n   * Get the score in Flat JSON format\n   *\n   * @return {Promise}\n   * @fulfill {object} The Flat data format\n   */\n  getJSON() {\n    return this.call('getJSON');\n  }\n\n  /**\n   * Convert the displayed score in MusicXML\n   *\n   * @param {object} options Conversion options (`compressed`)\n   * @return {Promise}\n   * @fullfill {string|Uint8Array} MusicXML File\n   * @reject {Error} Conversion error\n   */\n  getMusicXML(options) {\n    return new Promise((resolve, reject) => {\n      options = options || {};\n      if (typeof options !== 'object') {\n        return reject(new TypeError('Options must be an object'));\n      }\n      this.call('getMusicXML', options).then((data) => {\n        // Plain XML\n        if (typeof data === 'string') {\n          return resolve(data);\n        }\n        // Compressed, re-create Uint8Array\n        return resolve(new Uint8Array(data));\n      }).catch(reject);\n    });\n  }\n\n  /**\n   * Convert the displayed score in PNG\n   *\n   * @return {Promise}\n   * @fullfill {Uint8Array} PNG File\n   * @reject {Error} Conversion error\n   */\n   getPNG(options) {\n     return new Promise((resolve, reject) => {\n       options = options || {};\n       if (typeof options !== 'object') {\n         return reject(new TypeError('Options must be an object'));\n       }\n       this.call('getPNG', options).then((data) => {\n         if (typeof data === 'string') {\n           return resolve(data);\n         }\n         return resolve(new Uint8Array(data));\n       }).catch(reject);\n     });\n   }\n\n  /**\n   * Convert the displayed score in MIDI\n   *\n   * @return {Promise}\n   * @fullfill {Uint8Array} MIDI File\n   * @reject {Error} Conversion error\n   */\n  getMIDI() {\n    return this.call('getMIDI').then(data => new Uint8Array(data));\n  }\n\n  /**\n   * Get the metadata of the score (for scores hosted on Flat)\n   *\n   * @return {Promise}\n   * @fulfill {object} The Flat data format (result from https://flat.io/developers/api/reference/#operation/getScore)\n   */\n  getFlatScoreMetadata() {\n    return this.call('getFlatScoreMetadata');\n  }\n\n  /**\n   * Get the whole embed config\n   *\n   * @return {Promise}\n   * @fullfill {object} An object containing the config of the embed\n   */\n   getEmbedConfig() {\n     return this.call('getEmbedConfig');\n   }\n\n  /**\n   * Set a config for the embed mode\n   * This config can be fetched with `getEmbed()` (as `editor` value)\n   * This config will be applied at the next score loading\n   *\n   * @param {object} editor The editor config\n   * @return {Promise}\n   * @fullfill {object} An object containing the config of the editor\n   */\n   setEditorConfig(editor) {\n     return this.call('setEditorConfig', editor);\n   }\n\n  /**\n   * Toggle fullscreen state\n   *\n   * @param {boolean} active `true` to switch on fullscreen, `false` to switch off\n   * @return {Promise} Once the state changed\n   */\n  fullscreen(active) {\n    return this.call('fullscreen', active);\n  }\n\n  /**\n   * Start the playback\n   *\n   * @return {Promise}\n   */\n  play() {\n    return this.call('play');\n  }\n\n  /**\n   * Pause the playback\n   *\n   * @return {Promise}\n   */\n  pause() {\n    return this.call('pause');\n  }\n\n  /**\n   * Stop the playback\n   *\n   * @return {Promise}\n   */\n  stop() {\n    return this.call('stop');\n  }\n\n  /**\n   * Mute playback\n   *\n   * @return {Promise}\n   */\n  mute() {\n    return this.call('mute');\n  }\n\n  /**\n   * Print the score\n   *\n   * @return {Promise}\n   */\n  print() {\n    return this.call('print');\n  }\n\n  /**\n   * Get the current zoom ratio\n   *\n   * @return {Promise}\n   * @fullfill {number} The current scale ratio (0.5 to 3)\n   */\n  getZoom() {\n    return this.call('getZoom');\n  }\n\n  /**\n   * Set a new zoom ratio (this will disable the zoom auto if set)\n   *\n   * @param {number} zoom The scale ratio (0.5 to 3)\n   * @return {Promise}\n   * @fullfill {number} The scale ratio applied\n   */\n  setZoom(zoom) {\n    return this.call('setZoom', zoom);\n  }\n\n  /**\n   * Get the auto-zoom\n   *\n   * @return {Promise}\n   * @fullfill {boolean} `true` if enabled, `false` if disabled\n   */\n  getAutoZoom() {\n    return this.call('getAutoZoom');\n  }\n\n  /**\n   * Enable or disable the auto-zoom\n   *\n   * @param {boolean} state `true` if enabled, `false` if disabled\n   * @return {Promise}\n   * @fullfill {boolean} The auto-zoom mode\n   */\n  setAutoZoom(state) {\n    return this.call('setAutoZoom', state);\n  }\n\n  /**\n   * Set the focus to the score\n   *\n   * @return {Promise}\n   */\n  focusScore() {\n    return this.call('focusScore');\n  }\n\n  /**\n   * Get cursor position\n   *\n   * @return {Promise}\n   * @fullfill {boolean} Current cursor position\n   */\n  getCursorPosition() {\n    return this.call('getCursorPosition');\n  }\n\n  /**\n   * Set cursor position\n   *\n   * @param {object} position New cursor position\n   * @return {Promise}\n   * @fullfill {boolean} Current cursor position\n   */\n  setCursorPosition(position) {\n    return this.call('setCursorPosition', position);\n  }\n}\n\nexport default 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buildIframeUrl(parameters);\n\n  var iframe = document.createElement('iframe');\n  iframe.setAttribute('src', url);\n  iframe.setAttribute('width', parameters.width || '100%');\n  iframe.setAttribute('height', parameters.height || '100%');\n  iframe.setAttribute('allowfullscreen', true);\n  iframe.setAttribute('allow', 'midi');\n  iframe.setAttribute('frameborder', '0');\n\n  element.appendChild(iframe);\n\n  return iframe;\n}\n","/**\n * Send a message to the embed via postMessage\n *\n * @param {Embed} embed\n * @param {string} method The name of the method to call\n * @param {string} parameters The parameters to pass to the method\n */\nexport function postMessage(embed, method, parameters) {\n  if (!embed.element.contentWindow || !embed.element.contentWindow.postMessage) {\n    throw new Error('No `contentWindow` or `contentWindow.postMessage` avaialble on the element');\n  }\n\n  let message = {\n    method,\n    parameters\n  };\n\n  embed.element.contentWindow.postMessage(message, embed.origin);\n}\n\n/**\n * Parse a message received from postMessage\n *\n * @param {string|object} data The data received from postMessage\n * @return {object}\n */\nexport function parseMessage(data) {\n  if (typeof data === 'string') {\n    data = JSON.parse(data);\n  }\n  return data;\n}\n","\nclass EmbedCallback {\n  constructor(embed) {\n    this.embed = embed;\n    this.promises = {};\n    this.eventCallbacks = {};\n    return this;\n  }\n\n  pushCall(name, resolve, reject) {\n    this.promises[name] = this.promises[name] || [];\n    this.promises[name].push({resolve, reject});\n  }\n\n  /**\n   * Register a callback for a specified event\n   *\n   * @param {string} event The name of the event.\n   * @param {function} callback The function to call when receiving an event\n   * @return {boolen} `true` if it is the first subscriber, `false otherwise`\n   */\n  subscribeEvent(event, callback) {\n    this.eventCallbacks[event] = this.eventCallbacks[event] || [];\n    this.eventCallbacks[event].push(callback);\n    return this.eventCallbacks[event].length === 1;\n  }\n\n  /**\n   * Unregister a callback for a specified event\n   *\n   * @param {string} event The name of the event.\n   * @param {function} [callback] The function to call when receiving an event\n   * @return {boolen} `true` if it is the last subscriber, `false otherwise`\n   */\n  unsubscribeEvent(event, callback) {\n    // Was not subscribed\n    if (!this.eventCallbacks[event]) {\n      return false;\n    }\n\n    // If a callback is specified, unsub this one\n    if (callback) {\n      let idx = this.eventCallbacks[event].indexOf(callback);\n      if (idx >= 0) {\n        this.eventCallbacks[event].splice(idx, 1);\n      }\n    }\n    // Unsub all\n    else {\n      this.eventCallbacks[event] = [];\n    }\n\n    return !callback || this.eventCallbacks[event].length === 0;\n  }\n\n  /**\n   * Process a message received from postMessage\n   *\n   * @param {object} data The data received from postMessage\n   */\n  process(data) {\n    if (data.method) {\n      this.processMethodResponse(data);\n    }\n    else if (data.event) {\n      this.processEvent(data);\n    }\n  }\n\n  /**\n   * Process a method response\n   *\n   * @param {object} data The data received from postMessage\n   */\n  processMethodResponse(data) {\n    if (!this.promises[data.method]) {\n      return;\n    }\n    var promise = this.promises[data.method].shift();\n    if (!promise) {\n      return;\n    }\n    if (data.error) {\n      promise.reject(data.error);\n    }\n    else {\n      promise.resolve(data.response);\n    }\n  }\n\n  /**\n   * Process a receieved event\n   *\n   * @param {object} data The data received from postMessage\n   */\n  processEvent(data) {\n    if (!this.eventCallbacks[data.event] ||\n        this.eventCallbacks[data.event].length === 0) {\n      return;\n    }\n    this.eventCallbacks[data.event].forEach((callback) => {\n      callback.call(this.embed, data.parameters);\n    });\n  }\n}\n\nexport default EmbedCallback;\n","import './lib/compatibility';\n\nimport { normalizeElement } from './lib/dom';\nimport { createEmbedIframe } from './lib/embed';\nimport { postMessage, parseMessage } from './lib/communication';\nimport EmbedCallback from './lib/callback';\n\nconst embeds = new WeakMap();\nconst embedsReady = new WeakMap();\n\nclass Embed {\n  /**\n   * Create a new Flat Embed\n   *\n   * @param {(HTMLIFrameElement|HTMLElement|string|jQuery)} element A reference to a Flat Embed iframe or a container for the new iframe\n   * @param {object} [params] Parameters for the new iframe\n   * @return {Embed}\n   */\n  constructor(element, params = {}) {\n    element = normalizeElement(element);\n\n    // Keep a single object instance per iframe\n    if (embeds.has(element)) {\n      return embeds.get(element);\n    }\n\n    // Create new element iframe if needed\n    if (element.nodeName !== 'IFRAME') {\n      element = createEmbedIframe(element, params);\n    }\n\n    this.origin = '*';\n    this.element = element;\n    this.embedCallback = new EmbedCallback();\n\n    const onReady = new Promise((resolve) => {\n      // Handle incoming messages from embed\n      const onMessage = (event) => {\n        if (element.contentWindow !== event.source) {\n          return;\n        }\n\n        if (this.origin === '*') {\n          this.origin = event.origin;\n        }\n\n        // Parse inbound message\n        const data = parseMessage(event.data);\n\n        // Mark the embed as ready\n        if (data.event === 'ready' || data.method === 'ping') {\n          resolve();\n          return;\n        }\n\n        // Process regular messages from the embed\n        this.embedCallback.process(data);\n      };\n\n      window.addEventListener('message', onMessage, false);\n      postMessage(this, 'ping');\n    });\n\n    embeds.set(this.element, this);\n    embedsReady.set(this, onReady);\n\n    return this;\n  }\n\n  ready() {\n    return Promise.resolve(embedsReady.get(this));\n  }\n\n  call(method, parameters={}) {\n    return new Promise((resolve, reject) => {\n      return this.ready().then(() => {\n        this.embedCallback.pushCall(method, resolve, reject);\n        postMessage(this, method, parameters);\n      });\n    });\n  }\n\n  /**\n   * Subscribe to a specific event\n   *\n   * @param {string} event The name of the event.\n   * @param {function} callback The function to call when receiving an event\n   */\n  on(event, callback) {\n    if (typeof event !== 'string') {\n      throw new TypeError('An event name (string) is required');\n    }\n    if (typeof callback !== 'function') {\n      throw new TypeError('An callback (function) is required');\n    }\n    if (this.embedCallback.subscribeEvent(event, callback)) {\n      this.call('addEventListener', event).catch(() => {});\n    }\n  }\n\n  /**\n   * Unsubscribe to a specific event\n   *\n   * @param {string} event The name of the event.\n   * @param {function} [callback] The function to unsubscribe\n   */\n  off(event, callback) {\n    if (typeof event !== 'string') {\n      throw new TypeError('An event name (string) is required');\n    }\n    if (this.embedCallback.unsubscribeEvent(event, callback)) {\n      this.call('removeEventListener', event).catch(() => {});\n    }\n  }\n\n  /**\n   * Load a score hosted on Flat\n   *\n   * @param {string} score The unique identifier of the score\n   * @param {string} [revision] The unique identifier of the revision\n   * @return {Promise}\n   * @reject {ApiError} Unable to load the score\n   */\n  loadFlatScore(score, revision) {\n    return this.call('loadFlatScore', {score, revision});\n  }\n\n  /**\n   * Load a MusicXML score\n   *\n   * @param {string} score The MusicXML file\n   * @return {Promise}\n   * @reject {Error} Unable to load the score\n   */\n  loadMusicXML(score) {\n    return this.call('loadMusicXML', score);\n  }\n\n  /**\n   * Load a Flat JSON score\n   *\n   * @param {object|string} score The JSON of the score\n   * @return {Promise}\n   * @reject {Error} Unable to load the score\n   */\n  loadJSON(score) {\n    return this.call('loadJSON', score);\n  }\n\n  /**\n   * Get the score in Flat JSON format\n   *\n   * @return {Promise}\n   * @fulfill {object} The Flat data format\n   */\n  getJSON() {\n    return this.call('getJSON');\n  }\n\n  /**\n   * Convert the displayed score in MusicXML\n   *\n   * @param {object} options Conversion options (`compressed`)\n   * @return {Promise}\n   * @fullfill {string|Uint8Array} MusicXML File\n   * @reject {Error} Conversion error\n   */\n  getMusicXML(options) {\n    return new Promise((resolve, reject) => {\n      options = options || {};\n      if (typeof options !== 'object') {\n        return reject(new TypeError('Options must be an object'));\n      }\n      this.call('getMusicXML', options).then((data) => {\n        // Plain XML\n        if (typeof data === 'string') {\n          return resolve(data);\n        }\n        // Compressed, re-create Uint8Array\n        return resolve(new Uint8Array(data));\n      }).catch(reject);\n    });\n  }\n\n  /**\n   * Convert the displayed score in PNG\n   *\n   * @return {Promise}\n   * @fullfill {Uint8Array} PNG File\n   * @reject {Error} Conversion error\n   */\n   getPNG(options) {\n     return new Promise((resolve, reject) => {\n       options = options || {};\n       if (typeof options !== 'object') {\n         return reject(new TypeError('Options must be an object'));\n       }\n       this.call('getPNG', options).then((data) => {\n         if (typeof data === 'string') {\n           return resolve(data);\n         }\n         return resolve(new Uint8Array(data));\n       }).catch(reject);\n     });\n   }\n\n  /**\n   * Convert the displayed score in MIDI\n   *\n   * @return {Promise}\n   * @fullfill {Uint8Array} MIDI File\n   * @reject {Error} Conversion error\n   */\n  getMIDI() {\n    return 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editor);\n   }\n\n  /**\n   * Toggle fullscreen state\n   *\n   * @param {boolean} active `true` to switch on fullscreen, `false` to switch off\n   * @return {Promise} Once the state changed\n   */\n  fullscreen(active) {\n    return this.call('fullscreen', active);\n  }\n\n  /**\n   * Start the playback\n   *\n   * @return {Promise}\n   */\n  play() {\n    return this.call('play');\n  }\n\n  /**\n   * Pause the playback\n   *\n   * @return {Promise}\n   */\n  pause() {\n    return this.call('pause');\n  }\n\n  /**\n   * Stop the playback\n   *\n   * @return {Promise}\n   */\n  stop() {\n    return this.call('stop');\n  }\n\n  /**\n   * Mute playback\n   *\n   * @return {Promise}\n   */\n  mute() {\n    return this.call('mute');\n  }\n\n  /**\n   * Print the score\n   *\n   * @return {Promise}\n   */\n  print() {\n    return this.call('print');\n  }\n\n  /**\n   * Get the current zoom ratio\n   *\n   * @return {Promise}\n   * @fullfill {number} The current scale ratio (0.5 to 3)\n   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\ No newline at end of file
diff --git a/dist/embed.min.js b/dist/embed.min.js
index 7156e7b..9093fb5 100644
--- a/dist/embed.min.js
+++ b/dist/embed.min.js
@@ -1,2 +1,2 @@
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+/*! flat-embed v1.1.0 | (c) 2019 Tutteo Ltd. (Flat) | Apache-2.0 License | https://github.com/FlatIO/embed-client */
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diff --git a/dist/embed.min.js.map b/dist/embed.min.js.map
index 1c47b95..30eff28 100644
--- a/dist/embed.min.js.map
+++ b/dist/embed.min.js.map
@@ -1 +1 @@
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\ No newline at end of file
+{"version":3,"sources":["src/lib/compatibility.js","src/lib/embed.js","src/lib/communication.js","src/lib/callback.js","src/embed.js","src/lib/dom.js"],"names":["window","postMessage","Error","createEmbedIframe","element","parameters","url","baseUrl","score","urlParameters","Object","assign","jsapi","embedParams","keys","map","k","concat","encodeURIComponent","join","buildIframeUrl","iframe","document","createElement","setAttribute","width","height","appendChild","embed","method","contentWindow","message","origin","EmbedCallback","_classCallCheck","this","promises","eventCallbacks","name","resolve","reject","push","event","callback","length","idx","indexOf","splice","data","processMethodResponse","processEvent","promise","shift","error","response","_this","forEach","call","embeds","WeakMap","embedsReady","Embed","params","arguments","undefined","jQuery","getElementById","HTMLElement","TypeError","nodeName","querySelector","normalizeElement","has","get","embedCallback","onReady","Promise","addEventListener","source","JSON","parse","parseMessage","process","set","_this2","ready","then","pushCall","subscribeEvent","catch","unsubscribeEvent","revision","options","_this3","_typeof","Uint8Array","_this4","editor","active","zoom","state","position"],"mappings":";svBAAA,QAAkC,IAAvBA,OAAOC,YAChB,MAAM,IAAIC,MAAM,0DC4BX,SAASC,EAAkBC,EAASC,GACzC,IAAIC,EAzBC,SAAwBD,GAC7B,IAAIC,EAAOD,EAAWE,SAAW,yBAGjCD,GAAO,KAAOD,EAAWG,OAAS,SAGlC,IAAIC,EAAgBC,OAAOC,OAAO,CAChCC,OAAO,GACNP,EAAWQ,aAMd,OAAOP,EAAM,IAJJI,OAAOI,KAAKL,GAClBM,IAAI,SAAAC,GAAC,MAAA,GAAAC,OAAOC,mBAAmBF,GAA1B,KAAAC,OAAgCC,mBAAmBT,EAAcO,OACtEG,KAAK,KAYEC,CAAef,GAErBgB,EAASC,SAASC,cAAc,UAUpC,OATAF,EAAOG,aAAa,MAAOlB,GAC3Be,EAAOG,aAAa,QAASnB,EAAWoB,OAAS,QACjDJ,EAAOG,aAAa,SAAUnB,EAAWqB,QAAU,QACnDL,EAAOG,aAAa,mBAAmB,GACvCH,EAAOG,aAAa,QAAS,QAC7BH,EAAOG,aAAa,cAAe,KAEnCpB,EAAQuB,YAAYN,GAEbA,ECnCF,SAASpB,EAAY2B,EAAOC,EAAQxB,GACzC,IAAKuB,EAAMxB,QAAQ0B,gBAAkBF,EAAMxB,QAAQ0B,cAAc7B,YAC/D,MAAM,IAAIC,MAAM,8EAGlB,IAAI6B,EAAU,CACZF,OAAAA,EACAxB,WAAAA,GAGFuB,EAAMxB,QAAQ0B,cAAc7B,YAAY8B,EAASH,EAAMI,YChBnDC,aACJ,SAAAA,EAAYL,GAIV,OAJiBM,EAAAC,KAAAF,GACjBE,KAAKP,MAAQA,EACbO,KAAKC,SAAW,GAChBD,KAAKE,eAAiB,GACfF,gDAGAG,EAAMC,EAASC,GACtBL,KAAKC,SAASE,GAAQH,KAAKC,SAASE,IAAS,GAC7CH,KAAKC,SAASE,GAAMG,KAAK,CAACF,QAAAA,EAASC,OAAAA,2CAUtBE,EAAOC,GAGpB,OAFAR,KAAKE,eAAeK,GAASP,KAAKE,eAAeK,IAAU,GAC3DP,KAAKE,eAAeK,GAAOD,KAAKE,GACa,IAAtCR,KAAKE,eAAeK,GAAOE,gDAUnBF,EAAOC,GAEtB,IAAKR,KAAKE,eAAeK,GACvB,OAAO,EAIT,GAAIC,EAAU,CACZ,IAAIE,EAAMV,KAAKE,eAAeK,GAAOI,QAAQH,GAClC,GAAPE,GACFV,KAAKE,eAAeK,GAAOK,OAAOF,EAAK,QAKzCV,KAAKE,eAAeK,GAAS,GAG/B,OAAQC,GAAkD,IAAtCR,KAAKE,eAAeK,GAAOE,uCAQzCI,GACFA,EAAKnB,OACPM,KAAKc,sBAAsBD,GAEpBA,EAAKN,OACZP,KAAKe,aAAaF,iDASAA,GACpB,GAAKb,KAAKC,SAASY,EAAKnB,QAAxB,CAGA,IAAIsB,EAAUhB,KAAKC,SAASY,EAAKnB,QAAQuB,QACpCD,IAGDH,EAAKK,MACPF,EAAQX,OAAOQ,EAAKK,OAGpBF,EAAQZ,QAAQS,EAAKM,iDASZN,GAAM,IAAAO,EAAApB,KACZA,KAAKE,eAAeW,EAAKN,QACiB,IAA3CP,KAAKE,eAAeW,EAAKN,OAAOE,QAGpCT,KAAKE,eAAeW,EAAKN,OAAOc,QAAQ,SAACb,GACvCA,EAASc,KAAKF,EAAK3B,MAAOoB,EAAK3C,uBC9F/BqD,EAAS,IAAIC,QACbC,EAAc,IAAID,0BAUtB,SAAAE,MAAYzD,GAAsB,IAAAmD,EAAApB,KAAb2B,EAAa,EAAAC,UAAAnB,aAAAoB,IAAAD,UAAA,GAAAA,UAAA,GAAJ,GAI5B,GAJgC7B,EAAAC,KAAA0B,OAChCzD,ECbG,SAA0BA,GAW/B,GAVIJ,OAAOiE,QAAU7D,aAAmBJ,OAAOiE,SAC7C7D,EAAUA,EAAQ,IAIG,iBAAZA,IACTA,EAAUkB,SAAS4C,eAAe9D,MAI9BA,aAAmBJ,OAAOmE,aAC9B,MAAM,IAAIC,UAAU,yEAItB,GAAyB,WAArBhE,EAAQiE,SAAuB,CAEjC,IAAMhD,EAASjB,EAAQkE,cAAc,UACjCjD,IACFjB,EAAUiB,GAId,OAAOjB,EDXKmE,CAAiBnE,GAGvBsD,EAAOc,IAAIpE,GACb,OAAOsD,EAAOe,IAAIrE,GAIK,WAArBA,EAAQiE,WACVjE,EAAUD,EAAkBC,EAAS0D,IAGvC3B,KAAKH,OAAS,IACdG,KAAK/B,QAAUA,EACf+B,KAAKuC,cAAgB,IAAIzC,EAEzB,IAAM0C,EAAU,IAAIC,QAAQ,SAACrC,GAwB3BvC,OAAO6E,iBAAiB,UAtBN,SAACnC,GACjB,GAAItC,EAAQ0B,gBAAkBY,EAAMoC,OAApC,CAIoB,MAAhBvB,EAAKvB,SACPuB,EAAKvB,OAASU,EAAMV,QAItB,IAAMgB,EFrBP,SAAsBA,GAI3B,MAHoB,iBAATA,IACTA,EAAO+B,KAAKC,MAAMhC,IAEbA,EEiBYiC,CAAavC,EAAMM,MAGb,UAAfA,EAAKN,OAAqC,SAAhBM,EAAKnB,OAMnC0B,EAAKmB,cAAcQ,QAAQlC,GALzBT,OAQ0C,GAC9CtC,EAAYsD,EAAM,UAMpB,OAHAG,EAAOyB,IAAIhD,KAAK/B,QAAS+B,MACzByB,EAAYuB,IAAIhD,KAAMwC,GAEfxC,mDAIP,OAAOyC,QAAQrC,QAAQqB,EAAYa,IAAItC,oCAGpCN,GAAuB,IAAAuD,EAAAjD,KAAf9B,EAAe,EAAA0D,UAAAnB,aAAAoB,IAAAD,UAAA,GAAAA,UAAA,GAAJ,GACtB,OAAO,IAAIa,QAAQ,SAACrC,EAASC,GAC3B,OAAO4C,EAAKC,QAAQC,KAAK,WACvBF,EAAKV,cAAca,SAAS1D,EAAQU,EAASC,GAC7CvC,EAAYmF,EAAMvD,EAAQxB,kCAW7BqC,EAAOC,GACR,GAAqB,iBAAVD,EACT,MAAM,IAAI0B,UAAU,sCAEtB,GAAwB,mBAAbzB,EACT,MAAM,IAAIyB,UAAU,sCAElBjC,KAAKuC,cAAcc,eAAe9C,EAAOC,IAC3CR,KAAKsB,KAAK,mBAAoBf,GAAO+C,MAAM,0CAU3C/C,EAAOC,GACT,GAAqB,iBAAVD,EACT,MAAM,IAAI0B,UAAU,sCAElBjC,KAAKuC,cAAcgB,iBAAiBhD,EAAOC,IAC7CR,KAAKsB,KAAK,sBAAuBf,GAAO+C,MAAM,oDAYpCjF,EAAOmF,GACnB,OAAOxD,KAAKsB,KAAK,gBAAiB,CAACjD,MAAAA,EAAOmF,SAAAA,yCAU/BnF,GACX,OAAO2B,KAAKsB,KAAK,eAAgBjD,oCAU1BA,GACP,OAAO2B,KAAKsB,KAAK,WAAYjD,qCAU7B,OAAO2B,KAAKsB,KAAK,+CAWPmC,GAAS,IAAAC,EAAA1D,KACnB,OAAO,IAAIyC,QAAQ,SAACrC,EAASC,GAE3B,GAAuB,WAAnBsD,EADJF,EAAUA,GAAW,IAEnB,OAAOpD,EAAO,IAAI4B,UAAU,8BAE9ByB,EAAKpC,KAAK,cAAemC,GAASN,KAAK,SAACtC,GAEtC,OACST,EADW,iBAATS,EACMA,E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\ No newline at end of file
diff --git a/package.json b/package.json
index 87c2a28..a5d9fb6 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "flat-embed",
-  "version": "1.0.0",
+  "version": "1.1.0",
   "description": "Interact and get events from Flat's Sheet Music Embed",
   "license": "Apache-2.0",
   "author": "Flat Team <team@flat.io>",
diff --git a/src/lib/embed.js b/src/lib/embed.js
index 9ea00a0..08a7d11 100644
--- a/src/lib/embed.js
+++ b/src/lib/embed.js
@@ -35,6 +35,7 @@ export function createEmbedIframe(element, parameters) {
   iframe.setAttribute('width', parameters.width || '100%');
   iframe.setAttribute('height', parameters.height || '100%');
   iframe.setAttribute('allowfullscreen', true);
+  iframe.setAttribute('allow', 'midi');
   iframe.setAttribute('frameborder', '0');
 
   element.appendChild(iframe);