diff --git a/dist/hotkeys.common.js b/dist/hotkeys.common.js
index 08d3dd7d..74f074c2 100644
--- a/dist/hotkeys.common.js
+++ b/dist/hotkeys.common.js
@@ -1,5 +1,5 @@
 /*!
- * hotkeys-js v3.1.2
+ * hotkeys-js v3.2.0
  * A simple micro-library for defining and dispatching keyboard shortcuts. It has no dependencies.
  * 
  * Copyright (c) 2018 kenny wong <wowohoo@qq.com>
@@ -129,6 +129,8 @@ modifierMap[isff ? 224 : 91] = 'metaKey';
 _mods[isff ? 224 : 91] = false;
 
 var _scope = 'all'; // 默认热键范围
+var isBindElement = false; // 是否绑定节点
+
 // 返回键码
 var code = function code(x) {
   return _keyMap[x.toLowerCase()] || x.toUpperCase().charCodeAt(0);
@@ -308,7 +310,6 @@ function dispatch(event) {
       if (asterisk[i].scope === scope) eventHandler(event, asterisk[i], scope);
     }
   }
-
   // key 不在_handlers中返回
   if (!(key in _handlers)) return;
 
@@ -318,17 +319,25 @@ function dispatch(event) {
   }
 }
 
-function hotkeys(key, scope, method) {
+function hotkeys(key, option, method) {
   var keys = getKeys(key); // 需要处理的快捷键列表
   var mods = [];
+  var scope = 'all'; // scope默认为all，所有范围都有效
+  var element = document; // 快捷键事件绑定节点
   var i = 0;
 
   // 对为设定范围的判断
-  if (method === undefined) {
-    method = scope;
-    scope = 'all'; // scope默认为all，所有范围都有效
+  if (method === undefined && typeof option === 'function') {
+    method = option;
   }
 
+  if (toString.call(option) === '[object Object]') {
+    if (option.scope) scope = option.scope; // eslint-disable-line
+    if (option.element) element = option.element; // eslint-disable-line
+  }
+
+  if (typeof option === 'string') scope = option;
+
   // 对于每个快捷键进行处理
   for (; i < keys.length; i++) {
     key = keys[i].split('+'); // 按键列表
@@ -352,16 +361,16 @@ function hotkeys(key, scope, method) {
       key: keys[i]
     });
   }
-}
-
-// 在全局document上设置快捷键
-if (typeof document !== 'undefined') {
-  addEvent(document, 'keydown', function (e) {
-    dispatch(e);
-  });
-  addEvent(document, 'keyup', function (e) {
-    clearModifier(e);
-  });
+  // 在全局document上设置快捷键
+  if (typeof element !== 'undefined' && !isBindElement) {
+    isBindElement = true;
+    addEvent(element, 'keydown', function (e) {
+      dispatch(e);
+    });
+    addEvent(element, 'keyup', function (e) {
+      clearModifier(e);
+    });
+  }
 }
 
 var _api = {
diff --git a/dist/hotkeys.common.min.js b/dist/hotkeys.common.min.js
index f689845c..9da87f47 100644
--- a/dist/hotkeys.common.min.js
+++ b/dist/hotkeys.common.min.js
@@ -1,2 +1,2 @@
-/*! hotkeys-js v3.1.2 | MIT (c) 2018 kenny wong <wowohoo@qq.com> | http://jaywcjlove.github.io/hotkeys */
-"use strict";var isff="undefined"!=typeof navigator&&0<navigator.userAgent.toLowerCase().indexOf("firefox");function addEvent(e,o,t){e.addEventListener?e.addEventListener(o,t,!1):e.attachEvent&&e.attachEvent("on"+o,function(){t(window.event)})}function getMods(e,o){for(var t=o.slice(0,o.length-1),n=0;n<t.length;n++)t[n]=e[t[n].toLowerCase()];return t}function getKeys(e){e||(e="");for(var o=(e=e.replace(/\s/g,"")).split(","),t=o.lastIndexOf("");0<=t;)o[t-1]+=",",o.splice(t,1),t=o.lastIndexOf("");return o}function compareArray(e,o){for(var t=e.length<o.length?o:e,n=e.length<o.length?e:o,r=!0,s=0;s<t.length;s++)-1===n.indexOf(t[s])&&(r=!1);return r}for(var _keyMap={backspace:8,tab:9,clear:12,enter:13,return:13,esc:27,escape:27,space:32,left:37,up:38,right:39,down:40,del:46,delete:46,ins:45,insert:45,home:36,end:35,pageup:33,pagedown:34,capslock:20,"\u21ea":20,",":188,".":190,"/":191,"`":192,"-":isff?173:189,"=":isff?61:187,";":isff?59:186,"'":222,"[":219,"]":221,"\\":220},_modifier={"\u21e7":16,shift:16,"\u2325":18,alt:18,option:18,"\u2303":17,ctrl:17,control:17,"\u2318":isff?224:91,cmd:isff?224:91,command:isff?224:91},_downKeys=[],modifierMap={16:"shiftKey",18:"altKey",17:"ctrlKey"},_mods={16:!1,18:!1,17:!1},_handlers={},k=1;k<20;k++)_keyMap["f"+k]=111+k;modifierMap[isff?224:91]="metaKey",_mods[isff?224:91]=!1;var _scope="all",code=function(e){return _keyMap[e.toLowerCase()]||e.toUpperCase().charCodeAt(0)};function setScope(e){_scope=e||"all"}function getScope(){return _scope||"all"}function getPressedKeyCodes(){return _downKeys.slice(0)}function filter(e){var o=e.target.tagName||e.srcElement.tagName;return!("INPUT"===o||"SELECT"===o||"TEXTAREA"===o)}function isPressed(e){return"string"==typeof e&&(e=code(e)),-1!==_downKeys.indexOf(e)}function deleteScope(e,o){var t=void 0,n=void 0;for(var r in e||(e=getScope()),_handlers)if(Object.prototype.hasOwnProperty.call(_handlers,r))for(t=_handlers[r],n=0;n<t.length;)t[n].scope===e?t.splice(n,1):n++;getScope()===e&&setScope(o||"all")}function clearModifier(e){var o=_downKeys.indexOf(t),t=e.keyCode||e.which||e.charCode;if(o<0||_downKeys.splice(o,1),93!==t&&224!==t||(t=91),t in _mods)for(var n in _mods[t]=!1,_modifier)_modifier[n]===t&&(hotkeys[n]=!1)}function unbind(e,o){for(var t=getKeys(e),n=void 0,r=[],s=void 0,d=0;d<t.length;d++){if(1<(n=t[d].split("+")).length&&(r=getMods(_modifier,n)),e="*"===(e=n[n.length-1])?"*":code(e),o||(o=getScope()),!_handlers[e])return;for(var i=0;i<_handlers[e].length;i++)(s=_handlers[e][i]).scope===o&&compareArray(s.mods,r)&&(_handlers[e][i]={})}}function eventHandler(e,o,t){var n=void 0;if(o.scope===t||"all"===o.scope){for(var r in n=0<o.mods.length,_mods)Object.prototype.hasOwnProperty.call(_mods,r)&&(!_mods[r]&&-1<o.mods.indexOf(+r)||_mods[r]&&-1===o.mods.indexOf(+r))&&(n=!1);(0!==o.mods.length||_mods[16]||_mods[18]||_mods[17]||_mods[91])&&!n&&"*"!==o.shortcut||!1===o.method(e,o)&&(e.preventDefault?e.preventDefault():e.returnValue=!1,e.stopPropagation&&e.stopPropagation(),e.cancelBubble&&(e.cancelBubble=!0))}}function dispatch(e){var o=_handlers["*"],t=e.keyCode||e.which||e.charCode;if(-1===_downKeys.indexOf(t)&&_downKeys.push(t),93!==t&&224!==t||(t=91),t in _mods){for(var n in _mods[t]=!0,_modifier)_modifier[n]===t&&(hotkeys[n]=!0);if(!o)return}for(var r in _mods)Object.prototype.hasOwnProperty.call(_mods,r)&&(_mods[r]=e[modifierMap[r]]);if(hotkeys.filter.call(this,e)){var s=getScope();if(o)for(var d=0;d<o.length;d++)o[d].scope===s&&eventHandler(e,o[d],s);if(t in _handlers)for(var i=0;i<_handlers[t].length;i++)eventHandler(e,_handlers[t][i],s)}}function hotkeys(e,o,t){var n=getKeys(e),r=[],s=0;for(void 0===t&&(t=o,o="all");s<n.length;s++)r=[],1<(e=n[s].split("+")).length&&(r=getMods(_modifier,e)),(e="*"===(e=e[e.length-1])?"*":code(e))in _handlers||(_handlers[e]=[]),_handlers[e].push({scope:o,mods:r,shortcut:n[s],method:t,key:n[s]})}"undefined"!=typeof document&&(addEvent(document,"keydown",function(e){dispatch(e)}),addEvent(document,"keyup",function(e){clearModifier(e)}));var _api={setScope:setScope,getScope:getScope,deleteScope:deleteScope,getPressedKeyCodes:getPressedKeyCodes,isPressed:isPressed,filter:filter,unbind:unbind};for(var a in _api)Object.prototype.hasOwnProperty.call(_api,a)&&(hotkeys[a]=_api[a]);if("undefined"!=typeof window){var _hotkeys=window.hotkeys;hotkeys.noConflict=function(e){return e&&window.hotkeys===hotkeys&&(window.hotkeys=_hotkeys),hotkeys},window.hotkeys=hotkeys}module.exports=hotkeys;
\ No newline at end of file
+/*! hotkeys-js v3.2.0 | MIT (c) 2018 kenny wong <wowohoo@qq.com> | http://jaywcjlove.github.io/hotkeys */
+"use strict";var isff="undefined"!=typeof navigator&&0<navigator.userAgent.toLowerCase().indexOf("firefox");function addEvent(e,o,t){e.addEventListener?e.addEventListener(o,t,!1):e.attachEvent&&e.attachEvent("on"+o,function(){t(window.event)})}function getMods(e,o){for(var t=o.slice(0,o.length-1),n=0;n<t.length;n++)t[n]=e[t[n].toLowerCase()];return t}function getKeys(e){e||(e="");for(var o=(e=e.replace(/\s/g,"")).split(","),t=o.lastIndexOf("");0<=t;)o[t-1]+=",",o.splice(t,1),t=o.lastIndexOf("");return o}function compareArray(e,o){for(var t=e.length<o.length?o:e,n=e.length<o.length?e:o,r=!0,s=0;s<t.length;s++)-1===n.indexOf(t[s])&&(r=!1);return r}for(var _keyMap={backspace:8,tab:9,clear:12,enter:13,return:13,esc:27,escape:27,space:32,left:37,up:38,right:39,down:40,del:46,delete:46,ins:45,insert:45,home:36,end:35,pageup:33,pagedown:34,capslock:20,"\u21ea":20,",":188,".":190,"/":191,"`":192,"-":isff?173:189,"=":isff?61:187,";":isff?59:186,"'":222,"[":219,"]":221,"\\":220},_modifier={"\u21e7":16,shift:16,"\u2325":18,alt:18,option:18,"\u2303":17,ctrl:17,control:17,"\u2318":isff?224:91,cmd:isff?224:91,command:isff?224:91},_downKeys=[],modifierMap={16:"shiftKey",18:"altKey",17:"ctrlKey"},_mods={16:!1,18:!1,17:!1},_handlers={},k=1;k<20;k++)_keyMap["f"+k]=111+k;modifierMap[isff?224:91]="metaKey";var _scope="all",isBindElement=_mods[isff?224:91]=!1,code=function(e){return _keyMap[e.toLowerCase()]||e.toUpperCase().charCodeAt(0)};function setScope(e){_scope=e||"all"}function getScope(){return _scope||"all"}function getPressedKeyCodes(){return _downKeys.slice(0)}function filter(e){var o=e.target.tagName||e.srcElement.tagName;return!("INPUT"===o||"SELECT"===o||"TEXTAREA"===o)}function isPressed(e){return"string"==typeof e&&(e=code(e)),-1!==_downKeys.indexOf(e)}function deleteScope(e,o){var t=void 0,n=void 0;for(var r in e||(e=getScope()),_handlers)if(Object.prototype.hasOwnProperty.call(_handlers,r))for(t=_handlers[r],n=0;n<t.length;)t[n].scope===e?t.splice(n,1):n++;getScope()===e&&setScope(o||"all")}function clearModifier(e){var o=_downKeys.indexOf(t),t=e.keyCode||e.which||e.charCode;if(o<0||_downKeys.splice(o,1),93!==t&&224!==t||(t=91),t in _mods)for(var n in _mods[t]=!1,_modifier)_modifier[n]===t&&(hotkeys[n]=!1)}function unbind(e,o){for(var t=getKeys(e),n=void 0,r=[],s=void 0,i=0;i<t.length;i++){if(1<(n=t[i].split("+")).length&&(r=getMods(_modifier,n)),e="*"===(e=n[n.length-1])?"*":code(e),o||(o=getScope()),!_handlers[e])return;for(var d=0;d<_handlers[e].length;d++)(s=_handlers[e][d]).scope===o&&compareArray(s.mods,r)&&(_handlers[e][d]={})}}function eventHandler(e,o,t){var n=void 0;if(o.scope===t||"all"===o.scope){for(var r in n=0<o.mods.length,_mods)Object.prototype.hasOwnProperty.call(_mods,r)&&(!_mods[r]&&-1<o.mods.indexOf(+r)||_mods[r]&&-1===o.mods.indexOf(+r))&&(n=!1);(0!==o.mods.length||_mods[16]||_mods[18]||_mods[17]||_mods[91])&&!n&&"*"!==o.shortcut||!1===o.method(e,o)&&(e.preventDefault?e.preventDefault():e.returnValue=!1,e.stopPropagation&&e.stopPropagation(),e.cancelBubble&&(e.cancelBubble=!0))}}function dispatch(e){var o=_handlers["*"],t=e.keyCode||e.which||e.charCode;if(-1===_downKeys.indexOf(t)&&_downKeys.push(t),93!==t&&224!==t||(t=91),t in _mods){for(var n in _mods[t]=!0,_modifier)_modifier[n]===t&&(hotkeys[n]=!0);if(!o)return}for(var r in _mods)Object.prototype.hasOwnProperty.call(_mods,r)&&(_mods[r]=e[modifierMap[r]]);if(hotkeys.filter.call(this,e)){var s=getScope();if(o)for(var i=0;i<o.length;i++)o[i].scope===s&&eventHandler(e,o[i],s);if(t in _handlers)for(var d=0;d<_handlers[t].length;d++)eventHandler(e,_handlers[t][d],s)}}function hotkeys(e,o,t){var n=getKeys(e),r=[],s="all",i=document,d=0;for(void 0===t&&"function"==typeof o&&(t=o),"[object Object]"===toString.call(o)&&(o.scope&&(s=o.scope),o.element&&(i=o.element)),"string"==typeof o&&(s=o);d<n.length;d++)r=[],1<(e=n[d].split("+")).length&&(r=getMods(_modifier,e)),(e="*"===(e=e[e.length-1])?"*":code(e))in _handlers||(_handlers[e]=[]),_handlers[e].push({scope:s,mods:r,shortcut:n[d],method:t,key:n[d]});void 0===i||isBindElement||(isBindElement=!0,addEvent(i,"keydown",function(e){dispatch(e)}),addEvent(i,"keyup",function(e){clearModifier(e)}))}var _api={setScope:setScope,getScope:getScope,deleteScope:deleteScope,getPressedKeyCodes:getPressedKeyCodes,isPressed:isPressed,filter:filter,unbind:unbind};for(var a in _api)Object.prototype.hasOwnProperty.call(_api,a)&&(hotkeys[a]=_api[a]);if("undefined"!=typeof window){var _hotkeys=window.hotkeys;hotkeys.noConflict=function(e){return e&&window.hotkeys===hotkeys&&(window.hotkeys=_hotkeys),hotkeys},window.hotkeys=hotkeys}module.exports=hotkeys;
\ No newline at end of file
diff --git a/dist/hotkeys.esm.js b/dist/hotkeys.esm.js
index c44f0119..3ecefda6 100644
--- a/dist/hotkeys.esm.js
+++ b/dist/hotkeys.esm.js
@@ -1,5 +1,5 @@
 /*!
- * hotkeys-js v3.1.2
+ * hotkeys-js v3.2.0
  * A simple micro-library for defining and dispatching keyboard shortcuts. It has no dependencies.
  * 
  * Copyright (c) 2018 kenny wong <wowohoo@qq.com>
@@ -127,6 +127,8 @@ modifierMap[isff ? 224 : 91] = 'metaKey';
 _mods[isff ? 224 : 91] = false;
 
 var _scope = 'all'; // 默认热键范围
+var isBindElement = false; // 是否绑定节点
+
 // 返回键码
 var code = function code(x) {
   return _keyMap[x.toLowerCase()] || x.toUpperCase().charCodeAt(0);
@@ -306,7 +308,6 @@ function dispatch(event) {
       if (asterisk[i].scope === scope) eventHandler(event, asterisk[i], scope);
     }
   }
-
   // key 不在_handlers中返回
   if (!(key in _handlers)) return;
 
@@ -316,17 +317,25 @@ function dispatch(event) {
   }
 }
 
-function hotkeys(key, scope, method) {
+function hotkeys(key, option, method) {
   var keys = getKeys(key); // 需要处理的快捷键列表
   var mods = [];
+  var scope = 'all'; // scope默认为all，所有范围都有效
+  var element = document; // 快捷键事件绑定节点
   var i = 0;
 
   // 对为设定范围的判断
-  if (method === undefined) {
-    method = scope;
-    scope = 'all'; // scope默认为all，所有范围都有效
+  if (method === undefined && typeof option === 'function') {
+    method = option;
   }
 
+  if (toString.call(option) === '[object Object]') {
+    if (option.scope) scope = option.scope; // eslint-disable-line
+    if (option.element) element = option.element; // eslint-disable-line
+  }
+
+  if (typeof option === 'string') scope = option;
+
   // 对于每个快捷键进行处理
   for (; i < keys.length; i++) {
     key = keys[i].split('+'); // 按键列表
@@ -350,16 +359,16 @@ function hotkeys(key, scope, method) {
       key: keys[i]
     });
   }
-}
-
-// 在全局document上设置快捷键
-if (typeof document !== 'undefined') {
-  addEvent(document, 'keydown', function (e) {
-    dispatch(e);
-  });
-  addEvent(document, 'keyup', function (e) {
-    clearModifier(e);
-  });
+  // 在全局document上设置快捷键
+  if (typeof element !== 'undefined' && !isBindElement) {
+    isBindElement = true;
+    addEvent(element, 'keydown', function (e) {
+      dispatch(e);
+    });
+    addEvent(element, 'keyup', function (e) {
+      clearModifier(e);
+    });
+  }
 }
 
 var _api = {
diff --git a/dist/hotkeys.js b/dist/hotkeys.js
index a2177d49..dfcf8b1a 100644
--- a/dist/hotkeys.js
+++ b/dist/hotkeys.js
@@ -1,5 +1,5 @@
 /*!
- * hotkeys-js v3.1.2
+ * hotkeys-js v3.2.0
  * A simple micro-library for defining and dispatching keyboard shortcuts. It has no dependencies.
  * 
  * Copyright (c) 2018 kenny wong <wowohoo@qq.com>
@@ -133,6 +133,8 @@ modifierMap[isff ? 224 : 91] = 'metaKey';
 _mods[isff ? 224 : 91] = false;
 
 var _scope = 'all'; // 默认热键范围
+var isBindElement = false; // 是否绑定节点
+
 // 返回键码
 var code = function code(x) {
   return _keyMap[x.toLowerCase()] || x.toUpperCase().charCodeAt(0);
@@ -312,7 +314,6 @@ function dispatch(event) {
       if (asterisk[i].scope === scope) eventHandler(event, asterisk[i], scope);
     }
   }
-
   // key 不在_handlers中返回
   if (!(key in _handlers)) return;
 
@@ -322,17 +323,25 @@ function dispatch(event) {
   }
 }
 
-function hotkeys(key, scope, method) {
+function hotkeys(key, option, method) {
   var keys = getKeys(key); // 需要处理的快捷键列表
   var mods = [];
+  var scope = 'all'; // scope默认为all，所有范围都有效
+  var element = document; // 快捷键事件绑定节点
   var i = 0;
 
   // 对为设定范围的判断
-  if (method === undefined) {
-    method = scope;
-    scope = 'all'; // scope默认为all，所有范围都有效
+  if (method === undefined && typeof option === 'function') {
+    method = option;
   }
 
+  if (toString.call(option) === '[object Object]') {
+    if (option.scope) scope = option.scope; // eslint-disable-line
+    if (option.element) element = option.element; // eslint-disable-line
+  }
+
+  if (typeof option === 'string') scope = option;
+
   // 对于每个快捷键进行处理
   for (; i < keys.length; i++) {
     key = keys[i].split('+'); // 按键列表
@@ -356,16 +365,16 @@ function hotkeys(key, scope, method) {
       key: keys[i]
     });
   }
-}
-
-// 在全局document上设置快捷键
-if (typeof document !== 'undefined') {
-  addEvent(document, 'keydown', function (e) {
-    dispatch(e);
-  });
-  addEvent(document, 'keyup', function (e) {
-    clearModifier(e);
-  });
+  // 在全局document上设置快捷键
+  if (typeof element !== 'undefined' && !isBindElement) {
+    isBindElement = true;
+    addEvent(element, 'keydown', function (e) {
+      dispatch(e);
+    });
+    addEvent(element, 'keyup', function (e) {
+      clearModifier(e);
+    });
+  }
 }
 
 var _api = {
diff --git a/dist/hotkeys.min.js b/dist/hotkeys.min.js
index 0e48df4a..2c483608 100644
--- a/dist/hotkeys.min.js
+++ b/dist/hotkeys.min.js
@@ -1,2 +1,2 @@
-/*! hotkeys-js v3.1.2 | MIT (c) 2018 kenny wong <wowohoo@qq.com> | http://jaywcjlove.github.io/hotkeys */
-!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?module.exports=t():"function"==typeof define&&define.amd?define(t):e.hotkeys=t()}(this,function(){"use strict";var e="undefined"!=typeof navigator&&0<navigator.userAgent.toLowerCase().indexOf("firefox");function t(e,t,n){e.addEventListener?e.addEventListener(t,n,!1):e.attachEvent&&e.attachEvent("on"+t,function(){n(window.event)})}function c(e,t){for(var n=t.slice(0,t.length-1),o=0;o<n.length;o++)n[o]=e[n[o].toLowerCase()];return n}function l(e){e||(e="");for(var t=(e=e.replace(/\s/g,"")).split(","),n=t.lastIndexOf("");0<=n;)t[n-1]+=",",t.splice(n,1),n=t.lastIndexOf("");return t}function s(e,t){for(var n=e.length<t.length?t:e,o=e.length<t.length?e:t,r=!0,i=0;i<n.length;i++)-1===o.indexOf(n[i])&&(r=!1);return r}for(var n={backspace:8,tab:9,clear:12,enter:13,return:13,esc:27,escape:27,space:32,left:37,up:38,right:39,down:40,del:46,delete:46,ins:45,insert:45,home:36,end:35,pageup:33,pagedown:34,capslock:20,"\u21ea":20,",":188,".":190,"/":191,"`":192,"-":e?173:189,"=":e?61:187,";":e?59:186,"'":222,"[":219,"]":221,"\\":220},d={"\u21e7":16,shift:16,"\u2325":18,alt:18,option:18,"\u2303":17,ctrl:17,control:17,"\u2318":e?224:91,cmd:e?224:91,command:e?224:91},u=[],p={16:"shiftKey",18:"altKey",17:"ctrlKey"},h={16:!1,18:!1,17:!1},v={},o=1;o<20;o++)n["f"+o]=111+o;p[e?224:91]="metaKey",h[e?224:91]=!1;var r="all",g=function(e){return n[e.toLowerCase()]||e.toUpperCase().charCodeAt(0)};function i(e){r=e||"all"}function y(){return r||"all"}function w(e,t,n){var o=void 0;if(t.scope===n||"all"===t.scope){for(var r in o=0<t.mods.length,h)Object.prototype.hasOwnProperty.call(h,r)&&(!h[r]&&-1<t.mods.indexOf(+r)||h[r]&&-1===t.mods.indexOf(+r))&&(o=!1);(0!==t.mods.length||h[16]||h[18]||h[17]||h[91])&&!o&&"*"!==t.shortcut||!1===t.method(e,t)&&(e.preventDefault?e.preventDefault():e.returnValue=!1,e.stopPropagation&&e.stopPropagation(),e.cancelBubble&&(e.cancelBubble=!0))}}function m(e,t,n){var o=l(e),r=[],i=0;for(void 0===n&&(n=t,t="all");i<o.length;i++)r=[],1<(e=o[i].split("+")).length&&(r=c(d,e)),(e="*"===(e=e[e.length-1])?"*":g(e))in v||(v[e]=[]),v[e].push({scope:t,mods:r,shortcut:o[i],method:n,key:o[i]})}"undefined"!=typeof document&&(t(document,"keydown",function(e){!function(e){var t=v["*"],n=e.keyCode||e.which||e.charCode;if(-1===u.indexOf(n)&&u.push(n),93!==n&&224!==n||(n=91),n in h){for(var o in h[n]=!0,d)d[o]===n&&(m[o]=!0);if(!t)return}for(var r in h)Object.prototype.hasOwnProperty.call(h,r)&&(h[r]=e[p[r]]);if(m.filter.call(this,e)){var i=y();if(t)for(var a=0;a<t.length;a++)t[a].scope===i&&w(e,t[a],i);if(n in v)for(var f=0;f<v[n].length;f++)w(e,v[n][f],i)}}(e)}),t(document,"keyup",function(e){!function(e){var t=u.indexOf(n),n=e.keyCode||e.which||e.charCode;if(t<0||u.splice(t,1),93!==n&&224!==n||(n=91),n in h)for(var o in h[n]=!1,d)d[o]===n&&(m[o]=!1)}(e)}));var a={setScope:i,getScope:y,deleteScope:function(e,t){var n=void 0,o=void 0;for(var r in e||(e=y()),v)if(Object.prototype.hasOwnProperty.call(v,r))for(n=v[r],o=0;o<n.length;)n[o].scope===e?n.splice(o,1):o++;y()===e&&i(t||"all")},getPressedKeyCodes:function(){return u.slice(0)},isPressed:function(e){return"string"==typeof e&&(e=g(e)),-1!==u.indexOf(e)},filter:function(e){var t=e.target.tagName||e.srcElement.tagName;return!("INPUT"===t||"SELECT"===t||"TEXTAREA"===t)},unbind:function(e,t){for(var n=l(e),o=void 0,r=[],i=void 0,a=0;a<n.length;a++){if(1<(o=n[a].split("+")).length&&(r=c(d,o)),e="*"===(e=o[o.length-1])?"*":g(e),t||(t=y()),!v[e])return;for(var f=0;f<v[e].length;f++)(i=v[e][f]).scope===t&&s(i.mods,r)&&(v[e][f]={})}}};for(var f in a)Object.prototype.hasOwnProperty.call(a,f)&&(m[f]=a[f]);if("undefined"!=typeof window){var O=window.hotkeys;m.noConflict=function(e){return e&&window.hotkeys===m&&(window.hotkeys=O),m},window.hotkeys=m}return m});
\ No newline at end of file
+/*! hotkeys-js v3.2.0 | MIT (c) 2018 kenny wong <wowohoo@qq.com> | http://jaywcjlove.github.io/hotkeys */
+!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?module.exports=t():"function"==typeof define&&define.amd?define(t):e.hotkeys=t()}(this,function(){"use strict";var e="undefined"!=typeof navigator&&0<navigator.userAgent.toLowerCase().indexOf("firefox");function f(e,t,n){e.addEventListener?e.addEventListener(t,n,!1):e.attachEvent&&e.attachEvent("on"+t,function(){n(window.event)})}function l(e,t){for(var n=t.slice(0,t.length-1),o=0;o<n.length;o++)n[o]=e[n[o].toLowerCase()];return n}function s(e){e||(e="");for(var t=(e=e.replace(/\s/g,"")).split(","),n=t.lastIndexOf("");0<=n;)t[n-1]+=",",t.splice(n,1),n=t.lastIndexOf("");return t}function d(e,t){for(var n=e.length<t.length?t:e,o=e.length<t.length?e:t,r=!0,i=0;i<n.length;i++)-1===o.indexOf(n[i])&&(r=!1);return r}for(var t={backspace:8,tab:9,clear:12,enter:13,return:13,esc:27,escape:27,space:32,left:37,up:38,right:39,down:40,del:46,delete:46,ins:45,insert:45,home:36,end:35,pageup:33,pagedown:34,capslock:20,"\u21ea":20,",":188,".":190,"/":191,"`":192,"-":e?173:189,"=":e?61:187,";":e?59:186,"'":222,"[":219,"]":221,"\\":220},p={"\u21e7":16,shift:16,"\u2325":18,alt:18,option:18,"\u2303":17,ctrl:17,control:17,"\u2318":e?224:91,cmd:e?224:91,command:e?224:91},u=[],h={16:"shiftKey",18:"altKey",17:"ctrlKey"},v={16:!1,18:!1,17:!1},g={},n=1;n<20;n++)t["f"+n]=111+n;h[e?224:91]="metaKey";var o="all",y=v[e?224:91]=!1,w=function(e){return t[e.toLowerCase()]||e.toUpperCase().charCodeAt(0)};function i(e){o=e||"all"}function m(){return o||"all"}function O(e,t,n){var o=void 0;if(t.scope===n||"all"===t.scope){for(var r in o=0<t.mods.length,v)Object.prototype.hasOwnProperty.call(v,r)&&(!v[r]&&-1<t.mods.indexOf(+r)||v[r]&&-1===t.mods.indexOf(+r))&&(o=!1);(0!==t.mods.length||v[16]||v[18]||v[17]||v[91])&&!o&&"*"!==t.shortcut||!1===t.method(e,t)&&(e.preventDefault?e.preventDefault():e.returnValue=!1,e.stopPropagation&&e.stopPropagation(),e.cancelBubble&&(e.cancelBubble=!0))}}function b(e,t,n){var o=s(e),r=[],i="all",a=document,c=0;for(void 0===n&&"function"==typeof t&&(n=t),"[object Object]"===toString.call(t)&&(t.scope&&(i=t.scope),t.element&&(a=t.element)),"string"==typeof t&&(i=t);c<o.length;c++)r=[],1<(e=o[c].split("+")).length&&(r=l(p,e)),(e="*"===(e=e[e.length-1])?"*":w(e))in g||(g[e]=[]),g[e].push({scope:i,mods:r,shortcut:o[c],method:n,key:o[c]});void 0===a||y||(y=!0,f(a,"keydown",function(e){!function(e){var t=g["*"],n=e.keyCode||e.which||e.charCode;if(-1===u.indexOf(n)&&u.push(n),93!==n&&224!==n||(n=91),n in v){for(var o in v[n]=!0,p)p[o]===n&&(b[o]=!0);if(!t)return}for(var r in v)Object.prototype.hasOwnProperty.call(v,r)&&(v[r]=e[h[r]]);if(b.filter.call(this,e)){var i=m();if(t)for(var a=0;a<t.length;a++)t[a].scope===i&&O(e,t[a],i);if(n in g)for(var c=0;c<g[n].length;c++)O(e,g[n][c],i)}}(e)}),f(a,"keyup",function(e){!function(e){var t=u.indexOf(n),n=e.keyCode||e.which||e.charCode;if(t<0||u.splice(t,1),93!==n&&224!==n||(n=91),n in v)for(var o in v[n]=!1,p)p[o]===n&&(b[o]=!1)}(e)}))}var r={setScope:i,getScope:m,deleteScope:function(e,t){var n=void 0,o=void 0;for(var r in e||(e=m()),g)if(Object.prototype.hasOwnProperty.call(g,r))for(n=g[r],o=0;o<n.length;)n[o].scope===e?n.splice(o,1):o++;m()===e&&i(t||"all")},getPressedKeyCodes:function(){return u.slice(0)},isPressed:function(e){return"string"==typeof e&&(e=w(e)),-1!==u.indexOf(e)},filter:function(e){var t=e.target.tagName||e.srcElement.tagName;return!("INPUT"===t||"SELECT"===t||"TEXTAREA"===t)},unbind:function(e,t){for(var n=s(e),o=void 0,r=[],i=void 0,a=0;a<n.length;a++){if(1<(o=n[a].split("+")).length&&(r=l(p,o)),e="*"===(e=o[o.length-1])?"*":w(e),t||(t=m()),!g[e])return;for(var c=0;c<g[e].length;c++)(i=g[e][c]).scope===t&&d(i.mods,r)&&(g[e][c]={})}}};for(var a in r)Object.prototype.hasOwnProperty.call(r,a)&&(b[a]=r[a]);if("undefined"!=typeof window){var c=window.hotkeys;b.noConflict=function(e){return e&&window.hotkeys===b&&(window.hotkeys=c),b},window.hotkeys=b}return b});
\ No newline at end of file
diff --git a/package.json b/package.json
index 02277440..a6d6b0dd 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "hotkeys-js",
   "description": "A simple micro-library for defining and dispatching keyboard shortcuts. It has no dependencies.",
-  "version": "3.1.2",
+  "version": "3.2.0",
   "main": "index.js",
   "scripts": {
     "lint": "eslint --ext .js src website",
@@ -12,6 +12,7 @@
     "pretest": "npm run build",
     "test": "npm run lint && jest --coverage",
     "test:watch": "jest --watch",
+    "doc": "npm run doc:dev",
     "doc:dev": "NODE_ENV=development parcel website/index.html --out-dir build/ --no-cache",
     "doc:build": "NODE_ENV=production parcel build website/index.html --out-dir build/ --public-url ./ --no-cache"
   },