From 6d2b462e2b6368d2d8acf6cd09e9fcd37dde009c Mon Sep 17 00:00:00 2001
From: Kevin Brown <kevin@kevinbrown.in>
Date: Sat, 1 Nov 2014 21:04:31 -0400
Subject: [PATCH] Better key event handling

---
 dist/js/select2.amd.full.js        | 119 ++++++++++++++++-------------
 dist/js/select2.amd.js             | 119 ++++++++++++++++-------------
 dist/js/select2.full.js            | 119 ++++++++++++++++-------------
 dist/js/select2.full.min.js        |   4 +-
 dist/js/select2.js                 | 119 ++++++++++++++++-------------
 dist/js/select2.min.js             |   2 +-
 src/js/select2/core.js             |  14 ++--
 src/js/select2/dropdown/search.js  |  16 ++--
 src/js/select2/selection/single.js |   9 ++-
 9 files changed, 293 insertions(+), 228 deletions(-)

diff --git a/dist/js/select2.amd.full.js b/dist/js/select2.amd.full.js
index 4eb1a4b0..85e94edd 100644
--- a/dist/js/select2.amd.full.js
+++ b/dist/js/select2.amd.full.js
@@ -573,10 +573,51 @@ define('select2/selection/base',[
   return BaseSelection;
 });
 
+define('select2/keys',[
+
+], function () {
+  var KEYS = {
+    BACKSPACE: 8,
+    TAB: 9,
+    ENTER: 13,
+    SHIFT: 16,
+    CTRL: 17,
+    ALT: 18,
+    ESC: 27,
+    SPACE: 32,
+    PAGE_UP: 33,
+    PAGE_DOWN: 34,
+    END: 35,
+    HOME: 36,
+    LEFT: 37,
+    UP: 38,
+    RIGHT: 39,
+    DOWN: 40,
+    DELETE: 46,
+
+    isArrow: function (k) {
+        k = k.which ? k.which : k;
+
+        switch (k) {
+        case KEY.LEFT:
+        case KEY.RIGHT:
+        case KEY.UP:
+        case KEY.DOWN:
+            return true;
+        }
+
+        return false;
+    }
+  };
+
+  return KEYS;
+});
+
 define('select2/selection/single',[
   './base',
-  '../utils'
-], function (BaseSelection, Utils) {
+  '../utils',
+  '../keys'
+], function (BaseSelection, Utils, KEYS) {
   function SingleSelection () {
     SingleSelection.__super__.constructor.apply(this, arguments);
   }
@@ -644,6 +685,10 @@ define('select2/selection/single',[
 
     this.$selection.on('keydown', function (evt) {
       self.trigger('keypress', evt);
+
+      if (evt.which === KEYS.SPACE) {
+        evt.preventDefault();
+      }
     });
 
     container.on('results:focus', function (params) {
@@ -1344,16 +1389,20 @@ define('select2/dropdown/search',[
 
     decorated.call(this, container, $container);
 
-    this.$search.on('keyup', function (evt) {
+    this.$search.on('keydown', function (evt) {
       self.trigger('keypress', evt);
 
-      if (evt.isDefaultPrevented()) {
-        return;
+      self._keyUpPrevented = evt.isDefaultPrevented();
+    });
+
+    this.$search.on('keyup', function (evt) {
+      if (!self._keyUpPrevented) {
+        self.trigger('query', {
+          term: $(this).val()
+        });
       }
 
-      self.trigger('query', {
-        term: $(this).val()
-      });
+      self._keyUpPrevented = false;
     });
 
     container.on('open', function () {
@@ -1593,46 +1642,6 @@ define('select2/options',[
   return Options;
 });
 
-define('select2/keys',[
-
-], function () {
-  var KEYS = {
-    BACKSPACE: 8,
-    TAB: 9,
-    ENTER: 13,
-    SHIFT: 16,
-    CTRL: 17,
-    ALT: 18,
-    ESC: 27,
-    SPACE: 32,
-    PAGE_UP: 33,
-    PAGE_DOWN: 34,
-    END: 35,
-    HOME: 36,
-    LEFT: 37,
-    UP: 38,
-    RIGHT: 39,
-    DOWN: 40,
-    DELETE: 46,
-
-    isArrow: function (k) {
-        k = k.which ? k.which : k;
-
-        switch (k) {
-        case KEY.LEFT:
-        case KEY.RIGHT:
-        case KEY.UP:
-        case KEY.DOWN:
-            return true;
-        }
-
-        return false;
-    }
-  };
-
-  return KEYS;
-});
-
 define('select2/core',[
   'jquery',
   './options',
@@ -1862,22 +1871,26 @@ define('select2/core',[
       var key = evt.which;
 
       if (self.isOpen()) {
-        if (key == KEYS.ENTER) {
+        if (key === KEYS.ENTER) {
           self.trigger('results:select');
 
           evt.preventDefault();
-        } else if (key == KEYS.UP) {
+        } else if (key === KEYS.UP) {
           self.trigger('results:previous');
 
           evt.preventDefault();
-        } else if (key == KEYS.DOWN) {
+        } else if (key === KEYS.DOWN) {
           self.trigger('results:next');
 
+          evt.preventDefault();
+        } else if (key === KEYS.ESC || key === KEYS.TAB) {
+          self.close();
+
           evt.preventDefault();
         }
       } else {
-        if (key == KEYS.ENTER || key == KEYS.SPACE) {
-          self.trigger('open');
+        if (key === KEYS.ENTER || key === KEYS.SPACE) {
+          self.open();
 
           evt.preventDefault();
         }
diff --git a/dist/js/select2.amd.js b/dist/js/select2.amd.js
index 4eb1a4b0..85e94edd 100644
--- a/dist/js/select2.amd.js
+++ b/dist/js/select2.amd.js
@@ -573,10 +573,51 @@ define('select2/selection/base',[
   return BaseSelection;
 });
 
+define('select2/keys',[
+
+], function () {
+  var KEYS = {
+    BACKSPACE: 8,
+    TAB: 9,
+    ENTER: 13,
+    SHIFT: 16,
+    CTRL: 17,
+    ALT: 18,
+    ESC: 27,
+    SPACE: 32,
+    PAGE_UP: 33,
+    PAGE_DOWN: 34,
+    END: 35,
+    HOME: 36,
+    LEFT: 37,
+    UP: 38,
+    RIGHT: 39,
+    DOWN: 40,
+    DELETE: 46,
+
+    isArrow: function (k) {
+        k = k.which ? k.which : k;
+
+        switch (k) {
+        case KEY.LEFT:
+        case KEY.RIGHT:
+        case KEY.UP:
+        case KEY.DOWN:
+            return true;
+        }
+
+        return false;
+    }
+  };
+
+  return KEYS;
+});
+
 define('select2/selection/single',[
   './base',
-  '../utils'
-], function (BaseSelection, Utils) {
+  '../utils',
+  '../keys'
+], function (BaseSelection, Utils, KEYS) {
   function SingleSelection () {
     SingleSelection.__super__.constructor.apply(this, arguments);
   }
@@ -644,6 +685,10 @@ define('select2/selection/single',[
 
     this.$selection.on('keydown', function (evt) {
       self.trigger('keypress', evt);
+
+      if (evt.which === KEYS.SPACE) {
+        evt.preventDefault();
+      }
     });
 
     container.on('results:focus', function (params) {
@@ -1344,16 +1389,20 @@ define('select2/dropdown/search',[
 
     decorated.call(this, container, $container);
 
-    this.$search.on('keyup', function (evt) {
+    this.$search.on('keydown', function (evt) {
       self.trigger('keypress', evt);
 
-      if (evt.isDefaultPrevented()) {
-        return;
+      self._keyUpPrevented = evt.isDefaultPrevented();
+    });
+
+    this.$search.on('keyup', function (evt) {
+      if (!self._keyUpPrevented) {
+        self.trigger('query', {
+          term: $(this).val()
+        });
       }
 
-      self.trigger('query', {
-        term: $(this).val()
-      });
+      self._keyUpPrevented = false;
     });
 
     container.on('open', function () {
@@ -1593,46 +1642,6 @@ define('select2/options',[
   return Options;
 });
 
-define('select2/keys',[
-
-], function () {
-  var KEYS = {
-    BACKSPACE: 8,
-    TAB: 9,
-    ENTER: 13,
-    SHIFT: 16,
-    CTRL: 17,
-    ALT: 18,
-    ESC: 27,
-    SPACE: 32,
-    PAGE_UP: 33,
-    PAGE_DOWN: 34,
-    END: 35,
-    HOME: 36,
-    LEFT: 37,
-    UP: 38,
-    RIGHT: 39,
-    DOWN: 40,
-    DELETE: 46,
-
-    isArrow: function (k) {
-        k = k.which ? k.which : k;
-
-        switch (k) {
-        case KEY.LEFT:
-        case KEY.RIGHT:
-        case KEY.UP:
-        case KEY.DOWN:
-            return true;
-        }
-
-        return false;
-    }
-  };
-
-  return KEYS;
-});
-
 define('select2/core',[
   'jquery',
   './options',
@@ -1862,22 +1871,26 @@ define('select2/core',[
       var key = evt.which;
 
       if (self.isOpen()) {
-        if (key == KEYS.ENTER) {
+        if (key === KEYS.ENTER) {
           self.trigger('results:select');
 
           evt.preventDefault();
-        } else if (key == KEYS.UP) {
+        } else if (key === KEYS.UP) {
           self.trigger('results:previous');
 
           evt.preventDefault();
-        } else if (key == KEYS.DOWN) {
+        } else if (key === KEYS.DOWN) {
           self.trigger('results:next');
 
+          evt.preventDefault();
+        } else if (key === KEYS.ESC || key === KEYS.TAB) {
+          self.close();
+
           evt.preventDefault();
         }
       } else {
-        if (key == KEYS.ENTER || key == KEYS.SPACE) {
-          self.trigger('open');
+        if (key === KEYS.ENTER || key === KEYS.SPACE) {
+          self.open();
 
           evt.preventDefault();
         }
diff --git a/dist/js/select2.full.js b/dist/js/select2.full.js
index 412193d7..cb87e260 100644
--- a/dist/js/select2.full.js
+++ b/dist/js/select2.full.js
@@ -10108,10 +10108,51 @@ define('select2/selection/base',[
   return BaseSelection;
 });
 
+define('select2/keys',[
+
+], function () {
+  var KEYS = {
+    BACKSPACE: 8,
+    TAB: 9,
+    ENTER: 13,
+    SHIFT: 16,
+    CTRL: 17,
+    ALT: 18,
+    ESC: 27,
+    SPACE: 32,
+    PAGE_UP: 33,
+    PAGE_DOWN: 34,
+    END: 35,
+    HOME: 36,
+    LEFT: 37,
+    UP: 38,
+    RIGHT: 39,
+    DOWN: 40,
+    DELETE: 46,
+
+    isArrow: function (k) {
+        k = k.which ? k.which : k;
+
+        switch (k) {
+        case KEY.LEFT:
+        case KEY.RIGHT:
+        case KEY.UP:
+        case KEY.DOWN:
+            return true;
+        }
+
+        return false;
+    }
+  };
+
+  return KEYS;
+});
+
 define('select2/selection/single',[
   './base',
-  '../utils'
-], function (BaseSelection, Utils) {
+  '../utils',
+  '../keys'
+], function (BaseSelection, Utils, KEYS) {
   function SingleSelection () {
     SingleSelection.__super__.constructor.apply(this, arguments);
   }
@@ -10179,6 +10220,10 @@ define('select2/selection/single',[
 
     this.$selection.on('keydown', function (evt) {
       self.trigger('keypress', evt);
+
+      if (evt.which === KEYS.SPACE) {
+        evt.preventDefault();
+      }
     });
 
     container.on('results:focus', function (params) {
@@ -10879,16 +10924,20 @@ define('select2/dropdown/search',[
 
     decorated.call(this, container, $container);
 
-    this.$search.on('keyup', function (evt) {
+    this.$search.on('keydown', function (evt) {
       self.trigger('keypress', evt);
 
-      if (evt.isDefaultPrevented()) {
-        return;
+      self._keyUpPrevented = evt.isDefaultPrevented();
+    });
+
+    this.$search.on('keyup', function (evt) {
+      if (!self._keyUpPrevented) {
+        self.trigger('query', {
+          term: $(this).val()
+        });
       }
 
-      self.trigger('query', {
-        term: $(this).val()
-      });
+      self._keyUpPrevented = false;
     });
 
     container.on('open', function () {
@@ -11128,46 +11177,6 @@ define('select2/options',[
   return Options;
 });
 
-define('select2/keys',[
-
-], function () {
-  var KEYS = {
-    BACKSPACE: 8,
-    TAB: 9,
-    ENTER: 13,
-    SHIFT: 16,
-    CTRL: 17,
-    ALT: 18,
-    ESC: 27,
-    SPACE: 32,
-    PAGE_UP: 33,
-    PAGE_DOWN: 34,
-    END: 35,
-    HOME: 36,
-    LEFT: 37,
-    UP: 38,
-    RIGHT: 39,
-    DOWN: 40,
-    DELETE: 46,
-
-    isArrow: function (k) {
-        k = k.which ? k.which : k;
-
-        switch (k) {
-        case KEY.LEFT:
-        case KEY.RIGHT:
-        case KEY.UP:
-        case KEY.DOWN:
-            return true;
-        }
-
-        return false;
-    }
-  };
-
-  return KEYS;
-});
-
 define('select2/core',[
   'jquery',
   './options',
@@ -11397,22 +11406,26 @@ define('select2/core',[
       var key = evt.which;
 
       if (self.isOpen()) {
-        if (key == KEYS.ENTER) {
+        if (key === KEYS.ENTER) {
           self.trigger('results:select');
 
           evt.preventDefault();
-        } else if (key == KEYS.UP) {
+        } else if (key === KEYS.UP) {
           self.trigger('results:previous');
 
           evt.preventDefault();
-        } else if (key == KEYS.DOWN) {
+        } else if (key === KEYS.DOWN) {
           self.trigger('results:next');
 
+          evt.preventDefault();
+        } else if (key === KEYS.ESC || key === KEYS.TAB) {
+          self.close();
+
           evt.preventDefault();
         }
       } else {
-        if (key == KEYS.ENTER || key == KEYS.SPACE) {
-          self.trigger('open');
+        if (key === KEYS.ENTER || key === KEYS.SPACE) {
+          self.open();
 
           evt.preventDefault();
         }
diff --git a/dist/js/select2.full.min.js b/dist/js/select2.full.min.js
index a1768009..b84b5868 100644
--- a/dist/js/select2.full.min.js
+++ b/dist/js/select2.full.min.js
@@ -1,4 +1,4 @@
 window.$=window.$||{},function(){$&&$.fn&&$.fn.select2&&$.fn.select2.amd&&(c=$.fn.select2.amd.define,b=$.fn.select2.amd.require);var a,b,c;!function(d){function e(a,b){return u.call(a,b)}function f(a,b){var c,d,e,f,g,h,i,j,k,l,m,n=b&&b.split("/"),o=s.map,p=o&&o["*"]||{};if(a&&"."===a.charAt(0))if(b){for(n=n.slice(0,n.length-1),a=a.split("/"),g=a.length-1,s.nodeIdCompat&&w.test(a[g])&&(a[g]=a[g].replace(w,"")),a=n.concat(a),k=0;k<a.length;k+=1)if(m=a[k],"."===m)a.splice(k,1),k-=1;else if(".."===m){if(1===k&&(".."===a[2]||".."===a[0]))break;k>0&&(a.splice(k-1,2),k-=2)}a=a.join("/")}else 0===a.indexOf("./")&&(a=a.substring(2));if((n||p)&&o){for(c=a.split("/"),k=c.length;k>0;k-=1){if(d=c.slice(0,k).join("/"),n)for(l=n.length;l>0;l-=1)if(e=o[n.slice(0,l).join("/")],e&&(e=e[d])){f=e,h=k;break}if(f)break;!i&&p&&p[d]&&(i=p[d],j=k)}!f&&i&&(f=i,h=j),f&&(c.splice(0,h,f),a=c.join("/"))}return a}function g(a,b){return function(){return n.apply(d,v.call(arguments,0).concat([a,b]))}}function 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b=this,c=a.id+"-results";this.$results.attr("id",c),a.on("results:all",function(c){b.clear(),b.append(c.data),a.isOpen()&&b.setClasses()}),a.on("results:append",function(c){b.append(c.data),a.isOpen()&&b.setClasses()}),a.on("select",function(){a.isOpen()&&b.setClasses()}),a.on("unselect",function(){a.isOpen()&&b.setClasses()}),a.on("open",function(){b.$results.attr("aria-expanded","true"),b.$results.attr("aria-hidden","false"),b.setClasses(),b.ensureHighlightVisible()}),a.on("close",function(){b.$results.attr("aria-expanded","false"),b.$results.attr("aria-hidden","true"),b.$results.removeAttr("aria-activedescendant")}),a.on("results:select",function(){var a=b.$results.find(".highlighted");if(0!==a.length){var c=a.data("data");"true"==a.attr("aria-selected")?b.trigger("unselected",{data:c}):b.trigger("selected",{data:c})}}),a.on("results:previous",function(){var a=b.$results.find(".highlighted"),c=b.$results.find("[aria-selected]"),d=c.index(a);if(0!==d){var 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a=$(this).data("data");b.$results.find(".option.highlighted").removeClass("highlighted"),b.trigger("results:focus",{data:a,element:$(this)})}),this.$results.on("mouseleave",".option",function(){$(this).hasClass("highlighted")&&($(this).removeClass("highlighted"),b.$results.removeAttr("aria-activedescendant"))})},b.prototype.ensureHighlightVisible=function(){var a=this.$results.find(".highlighted");if(0!==a.length){var b=this.$results.find("[aria-selected]"),c=b.index(a),d=this.$results.offset().top,e=a.offset().top,f=this.$results.scrollTop()+(e-d),g=e-d;f-=2*a.outerHeight(!1),2>=c?this.$results.scrollTop(0):(g>this.$results.outerHeight()||0>g)&&this.$results.scrollTop(f)}},b}),c("select2/selection/base",["../utils"],function(a){function b(a,c){this.$element=a,this.options=c,b.__super__.constructor.call(this)}return a.Extend(b,a.Observable),b.prototype.render=function(){throw new Error("The `render` method must be defined in child classes.")},b.prototype.bind=function(a){var b=this;a.on("selection:update",function(a){b.update(a.data)}),a.on("open",function(){$(document.body).on("mousedown.select2."+a.id,function(a){var b=$(a.target),c=b.closest(".select2"),d=$(".select2.open");d.each(function(){var a=$(this);if(this!=c[0]){var b=a.data("element");b.select2("close")}})}),a.on("close",function(){$(document.body).off("mousedown.select2."+a.id)})})},b.prototype.update=function(){throw new Error("The `update` method must be defined in child classes.")},b}),c("select2/keys",[],function(){var a={BACKSPACE:8,TAB:9,ENTER:13,SHIFT:16,CTRL:17,ALT:18,ESC:27,SPACE:32,PAGE_UP:33,PAGE_DOWN:34,END:35,HOME:36,LEFT:37,UP:38,RIGHT:39,DOWN:40,DELETE:46,isArrow:function(a){switch(a=a.which?a.which:a){case KEY.LEFT:case KEY.RIGHT:case KEY.UP:case KEY.DOWN:return!0}return!1}};return a}),c("select2/selection/single",["./base","../utils","../keys"],function(a,b,c){function d(){d.__super__.constructor.apply(this,arguments)}return b.Extend(d,a),d.prototype.render=function(){var a=$('<span class="single-select" tabindex="0" role="combobox" aria-autocomplete="list" aria-haspopup="true" aria-expanded="false"><span class="rendered-selection"></span></span>');return a.attr("title",this.$element.attr("title")),this.$selection=a,a},d.prototype.bind=function(a){var b=this;d.__super__.bind.apply(this,arguments);var 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+},c.prototype.bind=function(){var a=this;c.__super__.bind.apply(this,arguments),this.$selection.on("click",function(b){a.trigger("toggle",{originalEvent:b})}),this.$selection.on("click",".remove",function(b){var c=$(this),d=c.parent(),e=d.data("data");a.trigger("unselected",{originalEvent:b,data:e})})},c.prototype.clear=function(){this.$selection.find(".rendered-selection").empty()},c.prototype.display=function(a){return a.text},c.prototype.selectionContainer=function(){var a=$('<li class="choice"><span class="remove" role="presentation">&times;</span></li>');return a},c.prototype.update=function(a){if(this.clear(),0!==a.length){for(var b=[],c=0;c<a.length;c++){var d=a[c],e=this.display(d),f=this.selectionContainer();f.append(e),f.data("data",d),b.push(f)}this.$selection.find(".rendered-selection").append(b)}},c}),c("select2/selection/placeholder",["../utils"],function(){function a(a,b,c){this.placeholder=this.normalizePlaceholder(c.get("placeholder")),a.call(this,b,c)}return a.prototype.normalizePlaceholder=function(a,b){return"string"==typeof b&&(b={id:"",text:b}),b},a.prototype.update=function(a,b){var c=1==b.length&&b[0].id!=this.placeholder.id,d=b.length>1;if(d||c)return a.call(this,b);this.clear();var e=this.selectionContainer();e.html(this.display(this.placeholder)),e.addClass("placeholder").removeClass("choice"),this.$selection.find(".rendered-selection").append(e)},a}),c("select2/translation",[],function(){function a(a){this.dict=a||{}}return a.prototype.all=function(){return this.dict},a.prototype.get=function(a){return this.dict[a]},a.prototype.extend=function(a){this.dict=$.extend({},a.all(),this.dict)},a._cache={},a.loadPath=function(c){if(!(c in a._cache)){var d=b(c);a._cache[c]=d}return new a(a._cache[c])},a}),c("select2/data/base",["../utils"],function(a){function b(){b.__super__.constructor.call(this)}return a.Extend(b,a.Observable),b.prototype.current=function(){throw new Error("The `current` method must be defined in child 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b=this;this.$element.prop("multiple")&&this.current(function(c){for(var d=[],e=0;e<c.length;e++)id=c[e].id,id!==a.id&&-1===d.indexOf(id)&&d.push(id);b.$element.val(d),b.$element.trigger("change")})},d.prototype.bind=function(a){var b=this;this.container=a,a.on("select",function(a){b.select(a.data)}),a.on("unselect",function(a){b.unselect(a.data)})},d.prototype.query=function(a,b){var d=[],e=this,f=this.$element.children();f.each(function(){var b=c(this);if(b.is("option")||b.is("optgroup")){var f=e.item(b),g=e.matches(a,f);null!==g&&d.push(g)}}),b(d)},d.prototype.option=function(a){var b=c("<option></option>");b.text(a.text),b.val(a.id),b.prop("disabled",a.disabled||!1);var d=this.item(b),e=c.extend({},a,d);return b.data("data",e),b},d.prototype.item=function(a){var b=a.data("data");if(null==b){if(a.is("option"))b={id:a.val(),text:a.html(),disabled:a.prop("disabled")};else if(a.is("optgroup")){b={text:a.attr("label"),children:[]};for(var d=a.children("option"),e=[],f=0;f<d.length;f++){var g=c(d[f]),h=this.item(g);e.push(h)}b.children=e}b.id&&null!=this.container&&(b._resultId=this.generateResultId(this.container,b)),a.data("data",b)}return b},d.prototype.matches=function(a,b){var d=c.extend(!0,{},b);if(b.children){for(var e=b.children.length-1;e>=0;e--){var f=b.children[e],g=this.matches(a,f);null===g&&d.children.splice(e,1)}if(d.children.length>0)return d}return""===c.trim(a.term)?d:b.text.toUpperCase().indexOf(a.term.toUpperCase())>-1?d:null},d}),c("select2/data/array",["./select","../utils","jquery"],function(a,b,c){function d(a,b){this.data=b.get("data"),d.__super__.constructor.call(this,a,b)}return b.Extend(d,a),d.prototype.select=function(a){var b=this;this.$element.find("option").each(function(){var d=c(this),e=b.item(d);e.id==a.id.toString()&&d.remove()});var e=this.option(a);this.$element.append(e),d.__super__.select.call(this,a)},d.prototype.query=function(a,b){var d=[],e=this;c.each(this.data,function(){var b=this;e.matches(a,b)&&d.push(b)}),b(d)},d}),c("select2/data/ajax",["./array","../utils","jquery"],function(a,b,c){function d(b,c){this.ajaxOptions=c.get("ajax"),this.processResults=this.ajaxOptions.processResults||function(a){return a},a.__super__.constructor.call(this,b,c)}return b.Extend(d,a),d.prototype.query=function(a,b){var d=this,e=c.extend({type:"GET"},this.ajaxOptions);"function"==typeof e.url&&(e.url=e.url(a)),"function"==typeof e.data&&(e.data=e.data(a));var f=c.ajax(e);f.success(function(a){var c=d.processResults(a);b(c)})},d}),c("select2/data/tags",[],function(){function a(a,b,c){c.get("tags");a.call(this,b,c)}return a.prototype.query=function(a,b,c){function d(a,f){for(var g=0;g<a.length;g++){var h=a[g],i=null!=h.children&&!d(h.children,!0),j=h.text===b.term;if(j||i)return f?!1:void c(a)}if(f)return!0;var k=e.createTag(b),l=e.option(k);l.attr("data-select2-tag",!0),e.$element.append(l),e.insertTag(a,k),c(a)}var e=this;return this._removeOldTags(),null==b.term||""===b.term||null!=b.page?void a.call(this,b,c):void a.call(this,b,d)},a.prototype.createTag=function(a,b){return{id:b.term,text:b.term}},a.prototype.insertTag=function(a,b,c){b.unshift(c)},a.prototype._removeOldTags=function(){var a=(this._lastTag,this.$element.find("option[data-select2-tag]"));a.each(function(){this.selected||$(this).remove()})},a}),c("select2/dropdown",["./utils"],function(a){function b(a){this.$element=a}return a.Extend(b,a.Observable),b.prototype.render=function(){var a=$('<span class="dropdown"><span class="results"></span></span>');return a},b.prototype.bind=function(){},b}),c("select2/dropdown/search",["../utils"],function(){function a(){}return a.prototype.render=function(a){var b=a.call(this),c=$('<span class="search"><input type="search" name="search" tabindex="-1" role="textbox" /></span>');return this.$searchContainer=c,this.$search=c.find("input"),b.prepend(c),b},a.prototype.bind=function(a,b,c){var d=this;a.call(this,b,c),this.$search.on("keydown",function(a){d.trigger("keypress",a),d._keyUpPrevented=a.isDefaultPrevented()}),this.$search.on("keyup",function(){d._keyUpPrevented||d.trigger("query",{term:$(this).val()}),d._keyUpPrevented=!1}),b.on("open",function(){d.$search.attr("tabindex",0)}),b.on("close",function(){d.$search.attr("tabindex",-1),d.$search.val("")}),b.on("results:all",function(a){if(null==a.query.term||""===a.query.term){var b=d.showSearch(a);b?d.$searchContainer.show():d.$searchContainer.hide()}})},a.prototype.showSearch=function(){return!0},a}),c("select2/dropdown/hidePlaceholder",[],function(){function a(a,b,c,d){this.placeholder=this.normalizePlaceholder(c.get("placeholder")),a.call(this,b,c,d)}return a.prototype.append=function(a,b){b=this.removePlaceholder(b),a.call(this,b)},a.prototype.normalizePlaceholder=function(a,b){return"string"==typeof b&&(b={id:"",text:b}),b},a.prototype.removePlaceholder=function(a,b){for(var c=b.slice(0),d=b.length-1;d>=0;d--){var e=b[d];this.placeholder.id===e.id&&c.splice(d,1)}return c},a}),c("select2/i18n/en",[],function(){return{noResults:function(){return"No results found"}}}),c("select2/defaults",["jquery","./results","./selection/single","./selection/multiple","./selection/placeholder","./utils","./translation","./data/select","./data/array","./data/ajax","./data/tags","./dropdown","./dropdown/search","./dropdown/hidePlaceholder","./i18n/en"],function(a,b,c,d,e,f,g,h,i,j,k,l,m,n){function o(){this.reset()}o.prototype.apply=function(o){if(o=a.extend({},this.defaults,o),null==o.dataAdapter&&(o.dataAdapter=o.ajax?j:o.data?i:h),null!=o.tags&&(o.dataAdapter=f.Decorate(o.dataAdapter,k)),null==o.resultsAdapter&&(o.resultsAdapter=b,null!=o.placeholder&&(o.resultsAdapter=f.Decorate(o.resultsAdapter,n))),null==o.dropdownAdapter){var p=f.Decorate(l,m);o.dropdownAdapter=p}if(null==o.selectionAdapter&&(o.selectionAdapter=o.multiple?d:c,null!=o.placeholder&&(o.selectionAdapter=f.Decorate(o.selectionAdapter,e))),"string"==typeof o.language&&(o.language=[o.language]),a.isArray(o.language)){for(var q=new g,r=o.language.concat(this.defaults.language),s=0;s<r.length;s++){var t=r[s],u={};try{u=g.loadPath(t)}catch(v){t="select2/i18n/"+t,u=g.loadPath(t)}q.extend(u)}o.translations=q}else o.translations=new Translations(o.language);return o},o.prototype.reset=function(){this.defaults={language:["select2/i18n/en"]}};var p=new o;return p}),c("select2/options",["./defaults"],function(a){function b(b,c){this.options=b,null!=c&&this.fromElement(c),this.options=a.apply(this.options)}return b.prototype.fromElement=function(a){return null==this.options.multiple&&(this.options.multiple=a.prop("multiple")),this},b.prototype.get=function(a){return this.options[a]},b.prototype.set=function(a,b){this.options[a]=b},b}),c("select2/core",["jquery","./options","./utils","./keys"],function(a,b,c,d){var e=function(a,c){this.$element=a,this.id=this._generateId(a),c=c||{},this.options=new b(c,a),e.__super__.constructor.call(this);var d=this.options.get("dataAdapter");this.data=new d(a,this.options);var f=this.render();this._placeContainer(f);var g=this.options.get("selectionAdapter");this.selection=new g(a,this.options);var h=this.selection.render();this._placeSelection(h);var i=this.options.get("dropdownAdapter");this.dropdown=new i(a,this.options);var j=this.dropdown.render();this._placeDropdown(j);var k=this.options.get("resultsAdapter");this.results=new k(a,this.options,this.data);var l=this.results.render();this._placeResults(l);var m=this;this._bindAdapters(),this._registerDomEvents(),this._registerSelectionEvents(),this._registerDropdownEvents(),this._registerResultsEvents(),this._registerEvents(),this.data.current(function(a){m.trigger("selection:update",{data:a})}),a.hide(),a.attr("tabindex","-1"),a.data("select2",this)};return c.Extend(e,c.Observable),e.prototype._generateId=function(a){var b="";return b=null!=a.attr("id")?a.attr("id"):null!=a.attr("name")?a.attr("name")+"-"+c.generateChars(2):c.generateChars(4),b="select2-"+b},e.prototype._placeContainer=function(a){a.insertAfter(this.$element),a.width(this.$element.outerWidth(!1))},e.prototype._placeSelection=function(a){var b=this.$container.find(".selection");b.append(a)},e.prototype._placeDropdown=function(a){this.$dropdown=a;var b=this.$container.find(".dropdown-wrapper");b.append(a)},e.prototype._placeResults=function(a){var b=this.$dropdown.find(".results");b.append(a)},e.prototype._bindAdapters=function(){this.data.bind(this,this.$container),this.selection.bind(this,this.$container),this.dropdown.bind(this,this.$container),this.results.bind(this,this.$container)},e.prototype._registerDomEvents=function(){var a=this;this.$element.on("change",function(){a.data.current(function(b){a.trigger("selection:update",{data:b})})})},e.prototype._registerSelectionEvents=function(){var a=this;this.selection.on("open",function(){a.open()}),this.selection.on("close",function(){a.close()}),this.selection.on("toggle",function(){a.toggleDropdown()}),this.selection.on("results:select",function(){a.trigger("results:select")}),this.selection.on("results:previous",function(){a.trigger("results:previous")}),this.selection.on("results:next",function(){a.trigger("results:next")}),this.selection.on("unselected",function(b){a.trigger("unselect",b),a.close()}),this.selection.on("keypress",function(b){a.trigger("keypress",b)})},e.prototype._registerDropdownEvents=function(){var a=this;this.dropdown.on("query",function(b){a.trigger("query",b)}),this.dropdown.on("keypress",function(b){a.trigger("keypress",b)})},e.prototype._registerResultsEvents=function(){var a=this;this.results.on("selected",function(b){a.trigger("select",b),a.close()}),this.results.on("unselected",function(b){a.trigger("unselect",b),a.close()}),this.results.on("results:focus",function(b){a.trigger("results:focus",b)})},e.prototype._registerEvents=function(){var a=this;this.on("open",function(){a.$container.addClass("open")}),this.on("close",function(){a.$container.removeClass("open")}),this.on("query",function(b){this.data.query(b,function(c){a.trigger("results:all",{data:c,query:b})})}),this.on("keypress",function(b){var c=b.which;a.isOpen()?c===d.ENTER?(a.trigger("results:select"),b.preventDefault()):c===d.UP?(a.trigger("results:previous"),b.preventDefault()):c===d.DOWN?(a.trigger("results:next"),b.preventDefault()):(c===d.ESC||c===d.TAB)&&(a.close(),b.preventDefault()):(c===d.ENTER||c===d.SPACE)&&(a.open(),b.preventDefault())})},e.prototype.toggleDropdown=function(){this.isOpen()?this.close():this.open()},e.prototype.open=function(){this.isOpen()||(this.trigger("query",{}),this.trigger("open"))},e.prototype.close=function(){this.isOpen()&&this.trigger("close")},e.prototype.isOpen=function(){return this.$container.hasClass("open")},e.prototype.render=function(){var b=a('<span class="select2 select2-container select2-theme-default"><span class="selection"></span><span class="dropdown-wrapper" aria-hidden="true"></span></span>');return this.$container=b,b.data("element",this.$element),b},e}),c("jquery.select2",["jquery","select2/core"],function(a,b){return null==a.fn.select2&&(a.fn.select2=function(c){if(c=c||{},"object"==typeof c)this.each(function(){new b(a(this),c)});else{if("string"!=typeof c)throw new Error("Invalid arguments for Select2: "+c);var d=this.data("select2"),e=Array.prototype.slice.call(arguments,1);d[c](e)}}),b}),b("jquery.select2"),$.fn.select2.amd={define:c,require:b}}();
\ No newline at end of file
diff --git a/dist/js/select2.js b/dist/js/select2.js
index 23308a79..c55db015 100644
--- a/dist/js/select2.js
+++ b/dist/js/select2.js
@@ -1001,10 +1001,51 @@ define('select2/selection/base',[
   return BaseSelection;
 });
 
+define('select2/keys',[
+
+], function () {
+  var KEYS = {
+    BACKSPACE: 8,
+    TAB: 9,
+    ENTER: 13,
+    SHIFT: 16,
+    CTRL: 17,
+    ALT: 18,
+    ESC: 27,
+    SPACE: 32,
+    PAGE_UP: 33,
+    PAGE_DOWN: 34,
+    END: 35,
+    HOME: 36,
+    LEFT: 37,
+    UP: 38,
+    RIGHT: 39,
+    DOWN: 40,
+    DELETE: 46,
+
+    isArrow: function (k) {
+        k = k.which ? k.which : k;
+
+        switch (k) {
+        case KEY.LEFT:
+        case KEY.RIGHT:
+        case KEY.UP:
+        case KEY.DOWN:
+            return true;
+        }
+
+        return false;
+    }
+  };
+
+  return KEYS;
+});
+
 define('select2/selection/single',[
   './base',
-  '../utils'
-], function (BaseSelection, Utils) {
+  '../utils',
+  '../keys'
+], function (BaseSelection, Utils, KEYS) {
   function SingleSelection () {
     SingleSelection.__super__.constructor.apply(this, arguments);
   }
@@ -1072,6 +1113,10 @@ define('select2/selection/single',[
 
     this.$selection.on('keydown', function (evt) {
       self.trigger('keypress', evt);
+
+      if (evt.which === KEYS.SPACE) {
+        evt.preventDefault();
+      }
     });
 
     container.on('results:focus', function (params) {
@@ -1772,16 +1817,20 @@ define('select2/dropdown/search',[
 
     decorated.call(this, container, $container);
 
-    this.$search.on('keyup', function (evt) {
+    this.$search.on('keydown', function (evt) {
       self.trigger('keypress', evt);
 
-      if (evt.isDefaultPrevented()) {
-        return;
+      self._keyUpPrevented = evt.isDefaultPrevented();
+    });
+
+    this.$search.on('keyup', function (evt) {
+      if (!self._keyUpPrevented) {
+        self.trigger('query', {
+          term: $(this).val()
+        });
       }
 
-      self.trigger('query', {
-        term: $(this).val()
-      });
+      self._keyUpPrevented = false;
     });
 
     container.on('open', function () {
@@ -2021,46 +2070,6 @@ define('select2/options',[
   return Options;
 });
 
-define('select2/keys',[
-
-], function () {
-  var KEYS = {
-    BACKSPACE: 8,
-    TAB: 9,
-    ENTER: 13,
-    SHIFT: 16,
-    CTRL: 17,
-    ALT: 18,
-    ESC: 27,
-    SPACE: 32,
-    PAGE_UP: 33,
-    PAGE_DOWN: 34,
-    END: 35,
-    HOME: 36,
-    LEFT: 37,
-    UP: 38,
-    RIGHT: 39,
-    DOWN: 40,
-    DELETE: 46,
-
-    isArrow: function (k) {
-        k = k.which ? k.which : k;
-
-        switch (k) {
-        case KEY.LEFT:
-        case KEY.RIGHT:
-        case KEY.UP:
-        case KEY.DOWN:
-            return true;
-        }
-
-        return false;
-    }
-  };
-
-  return KEYS;
-});
-
 define('select2/core',[
   'jquery',
   './options',
@@ -2290,22 +2299,26 @@ define('select2/core',[
       var key = evt.which;
 
       if (self.isOpen()) {
-        if (key == KEYS.ENTER) {
+        if (key === KEYS.ENTER) {
           self.trigger('results:select');
 
           evt.preventDefault();
-        } else if (key == KEYS.UP) {
+        } else if (key === KEYS.UP) {
           self.trigger('results:previous');
 
           evt.preventDefault();
-        } else if (key == KEYS.DOWN) {
+        } else if (key === KEYS.DOWN) {
           self.trigger('results:next');
 
+          evt.preventDefault();
+        } else if (key === KEYS.ESC || key === KEYS.TAB) {
+          self.close();
+
           evt.preventDefault();
         }
       } else {
-        if (key == KEYS.ENTER || key == KEYS.SPACE) {
-          self.trigger('open');
+        if (key === KEYS.ENTER || key === KEYS.SPACE) {
+          self.open();
 
           evt.preventDefault();
         }
diff --git a/dist/js/select2.min.js b/dist/js/select2.min.js
index 2cf2122c..6ab5a049 100644
--- a/dist/js/select2.min.js
+++ b/dist/js/select2.min.js
@@ -1 +1 @@
-window.$=window.$||{},function(){$&&$.fn&&$.fn.select2&&$.fn.select2.amd&&(c=$.fn.select2.amd.define,b=$.fn.select2.amd.require);var a,b,c;!function(d){function e(a,b){return u.call(a,b)}function f(a,b){var c,d,e,f,g,h,i,j,k,l,m,n=b&&b.split("/"),o=s.map,p=o&&o["*"]||{};if(a&&"."===a.charAt(0))if(b){for(n=n.slice(0,n.length-1),a=a.split("/"),g=a.length-1,s.nodeIdCompat&&w.test(a[g])&&(a[g]=a[g].replace(w,"")),a=n.concat(a),k=0;k<a.length;k+=1)if(m=a[k],"."===m)a.splice(k,1),k-=1;else if(".."===m){if(1===k&&(".."===a[2]||".."===a[0]))break;k>0&&(a.splice(k-1,2),k-=2)}a=a.join("/")}else 0===a.indexOf("./")&&(a=a.substring(2));if((n||p)&&o){for(c=a.split("/"),k=c.length;k>0;k-=1){if(d=c.slice(0,k).join("/"),n)for(l=n.length;l>0;l-=1)if(e=o[n.slice(0,l).join("/")],e&&(e=e[d])){f=e,h=k;break}if(f)break;!i&&p&&p[d]&&(i=p[d],j=k)}!f&&i&&(f=i,h=j),f&&(c.splice(0,h,f),a=c.join("/"))}return a}function g(a,b){return function(){return n.apply(d,v.call(arguments,0).concat([a,b]))}}function h(a){return function(b){return f(b,a)}}function i(a){return function(b){q[a]=b}}function j(a){if(e(r,a)){var b=r[a];delete r[a],t[a]=!0,m.apply(d,b)}if(!e(q,a)&&!e(t,a))throw new Error("No "+a);return q[a]}function k(a){var b,c=a?a.indexOf("!"):-1;return c>-1&&(b=a.substring(0,c),a=a.substring(c+1,a.length)),[b,a]}function l(a){return function(){return s&&s.config&&s.config[a]||{}}}var m,n,o,p,q={},r={},s={},t={},u=Object.prototype.hasOwnProperty,v=[].slice,w=/\.js$/;o=function(a,b){var c,d=k(a),e=d[0];return a=d[1],e&&(e=f(e,b),c=j(e)),e?a=c&&c.normalize?c.normalize(a,h(b)):f(a,b):(a=f(a,b),d=k(a),e=d[0],a=d[1],e&&(c=j(e))),{f:e?e+"!"+a:a,n:a,pr:e,p:c}},p={require:function(a){return g(a)},exports:function(a){var b=q[a];return"undefined"!=typeof b?b:q[a]={}},module:function(a){return{id:a,uri:"",exports:q[a],config:l(a)}}},m=function(a,b,c,f){var h,k,l,m,n,s,u=[],v=typeof 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jQuery}),c("select2/utils",[],function(){function a(a){var b=a.prototype,c=[];for(var d in b){var e=b[d];"function"==typeof e&&c.push(d)}return c}var b={};b.Extend=function(a,b){function c(){this.constructor=a}var d={}.hasOwnProperty;for(var e in b)d.call(b,e)&&(a[e]=b[e]);return c.prototype=b.prototype,a.prototype=new c,a.__super__=b.prototype,a},b.Decorate=function(b,c){function d(){var a=Array.prototype.unshift,d=c.prototype.constructor.length,e=b.prototype.constructor;d>0&&(a.call(arguments,b.prototype.constructor),e=c.prototype.constructor),e.apply(this,arguments)}function e(){this.constructor=d}var f=a(c),g=a(b);c.displayName=b.displayName,d.prototype=new e;for(var h=0;h<g.length;h++){var i=g[h];d.prototype[i]=b.prototype[i]}for(var j=(function(a){var b=function(){};a in d.prototype&&(b=d.prototype[a]);var e=c.prototype[a];return function(){var a=Array.prototype.unshift;return a.call(arguments,b),e.apply(this,arguments)}}),k=0;k<f.length;k++){var l=f[k];d.prototype[l]=j(l)}return 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e=d.filter("[aria-selected=true]");e.length>0?e.first().trigger("mouseenter"):d.first().trigger("mouseenter")})},b.prototype.option=function(a){var b=$('<li class="option" role="treeitem" aria-selected="false"></li>');if(a.children){b.attr("role","group").attr("aria-label",a.text).removeAttr("aria-selected");var c=$('<strong class="group-label"></strong>');c.html(a.text);for(var d=[],e=0;e<a.children.length;e++){var f=a.children[e],g=this.option(f);d.push(g)}var h=$('<ul class="options nested-options"></ul>');h.append(d),b.append(c),b.append(h)}else b.html(a.text);return a.disabled&&b.removeAttr("aria-selected").attr("aria-disabled","true"),null==a.id&&b.removeAttr("aria-selected"),null!=a._resultId&&b.attr("id",a._resultId),b.data("data",a),b},b.prototype.bind=function(a){var 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b=this,c=a.id+"-results";this.$results.attr("id",c),a.on("results:all",function(c){b.clear(),b.append(c.data),a.isOpen()&&b.setClasses()}),a.on("results:append",function(c){b.append(c.data),a.isOpen()&&b.setClasses()}),a.on("select",function(){a.isOpen()&&b.setClasses()}),a.on("unselect",function(){a.isOpen()&&b.setClasses()}),a.on("open",function(){b.$results.attr("aria-expanded","true"),b.$results.attr("aria-hidden","false"),b.setClasses(),b.ensureHighlightVisible()}),a.on("close",function(){b.$results.attr("aria-expanded","false"),b.$results.attr("aria-hidden","true"),b.$results.removeAttr("aria-activedescendant")}),a.on("results:select",function(){var a=b.$results.find(".highlighted");if(0!==a.length){var c=a.data("data");"true"==a.attr("aria-selected")?b.trigger("unselected",{data:c}):b.trigger("selected",{data:c})}}),a.on("results:previous",function(){var a=b.$results.find(".highlighted"),c=b.$results.find("[aria-selected]"),d=c.index(a);if(0!==d){var e=d-1;0===a.length&&(e=0);var f=c.eq(e);f.trigger("mouseenter");var g=b.$results.offset().top,h=f.offset().top,i=b.$results.scrollTop()+(h-g);0===e?b.$results.scrollTop(0):0>h-g&&b.$results.scrollTop(i)}}),a.on("results:next",function(){var a=b.$results.find(".highlighted"),c=b.$results.find("[aria-selected]"),d=c.index(a),e=d+1;if(!(e>=c.length)){var f=c.eq(e);f.trigger("mouseenter");var g=b.$results.offset().top+b.$results.outerHeight(!1),h=f.offset().top+f.outerHeight(!1),i=b.$results.scrollTop()+h-g;0===e?b.$results.scrollTop(0):h>g&&b.$results.scrollTop(i)}}),a.on("results:focus",function(a){a.element.addClass("highlighted")}),this.$results.on("mouseup",".option[aria-selected]",function(a){var c=$(this),d=c.data("data");return"true"===c.attr("aria-selected")?void b.trigger("unselected",{originalEvent:a,data:d}):void b.trigger("selected",{originalEvent:a,data:d})}),this.$results.on("mouseenter",".option[aria-selected]",function(){var a=$(this).data("data");b.$results.find(".option.highlighted").removeClass("highlighted"),b.trigger("results:focus",{data:a,element:$(this)})}),this.$results.on("mouseleave",".option",function(){$(this).hasClass("highlighted")&&($(this).removeClass("highlighted"),b.$results.removeAttr("aria-activedescendant"))})},b.prototype.ensureHighlightVisible=function(){var a=this.$results.find(".highlighted");if(0!==a.length){var b=this.$results.find("[aria-selected]"),c=b.index(a),d=this.$results.offset().top,e=a.offset().top,f=this.$results.scrollTop()+(e-d),g=e-d;f-=2*a.outerHeight(!1),2>=c?this.$results.scrollTop(0):(g>this.$results.outerHeight()||0>g)&&this.$results.scrollTop(f)}},b}),c("select2/selection/base",["../utils"],function(a){function b(a,c){this.$element=a,this.options=c,b.__super__.constructor.call(this)}return a.Extend(b,a.Observable),b.prototype.render=function(){throw new Error("The `render` method must be defined in child classes.")},b.prototype.bind=function(a){var b=this;a.on("selection:update",function(a){b.update(a.data)}),a.on("open",function(){$(document.body).on("mousedown.select2."+a.id,function(a){var b=$(a.target),c=b.closest(".select2"),d=$(".select2.open");d.each(function(){var a=$(this);if(this!=c[0]){var b=a.data("element");b.select2("close")}})}),a.on("close",function(){$(document.body).off("mousedown.select2."+a.id)})})},b.prototype.update=function(){throw new Error("The `update` method must be defined in child classes.")},b}),c("select2/keys",[],function(){var a={BACKSPACE:8,TAB:9,ENTER:13,SHIFT:16,CTRL:17,ALT:18,ESC:27,SPACE:32,PAGE_UP:33,PAGE_DOWN:34,END:35,HOME:36,LEFT:37,UP:38,RIGHT:39,DOWN:40,DELETE:46,isArrow:function(a){switch(a=a.which?a.which:a){case KEY.LEFT:case KEY.RIGHT:case KEY.UP:case KEY.DOWN:return!0}return!1}};return a}),c("select2/selection/single",["./base","../utils","../keys"],function(a,b,c){function d(){d.__super__.constructor.apply(this,arguments)}return b.Extend(d,a),d.prototype.render=function(){var a=$('<span class="single-select" tabindex="0" role="combobox" aria-autocomplete="list" aria-haspopup="true" aria-expanded="false"><span class="rendered-selection"></span></span>');return a.attr("title",this.$element.attr("title")),this.$selection=a,a},d.prototype.bind=function(a){var b=this;d.__super__.bind.apply(this,arguments);var e=a.id+"-container",f=a.id+"-results";this.$selection.find(".rendered-selection").attr("id",e),this.$selection.attr("aria-labelledby",e),this.$selection.attr("aria-owns",f),this.$selection.on("mousedown",function(a){1===a.which&&b.trigger("toggle",{originalEvent:a})}),a.on("open",function(){b.$selection.attr("aria-expanded","true")}),a.on("close",function(){b.$selection.attr("aria-expanded","false"),b.$selection.removeAttr("aria-activedescendant"),b.$selection.focus()}),this.$selection.on("focus",function(){}),this.$selection.on("blur",function(){}),this.$selection.on("keydown",function(a){b.trigger("keypress",a),a.which===c.SPACE&&a.preventDefault()}),a.on("results:focus",function(a){b.$selection.attr("aria-activedescendant",a.data._resultId)}),a.on("selection:update",function(a){b.update(a.data)})},d.prototype.clear=function(){this.$selection.find(".rendered-selection").empty()},d.prototype.display=function(a){return a.text},d.prototype.selectionContainer=function(){return $("<span></span>")},d.prototype.update=function(a){if(0===a.length)return void this.clear();var b=a[0],c=this.display(b);this.$selection.find(".rendered-selection").html(c)},d}),c("select2/selection/multiple",["./base","../utils"],function(a,b){function c(a,b){this.$element=a,this.options=b,c.__super__.constructor.call(this)}return b.Extend(c,a),c.prototype.render=function(){var a=$('<span class="multiple-select"><ul class="rendered-selection"></ul></span>');return this.$selection=a,a},c.prototype.bind=function(){var a=this;c.__super__.bind.apply(this,arguments),this.$selection.on("click",function(b){a.trigger("toggle",{originalEvent:b})}),this.$selection.on("click",".remove",function(b){var c=$(this),d=c.parent(),e=d.data("data");a.trigger("unselected",{originalEvent:b,data:e})})},c.prototype.clear=function(){this.$selection.find(".rendered-selection").empty()},c.prototype.display=function(a){return a.text},c.prototype.selectionContainer=function(){var a=$('<li class="choice"><span class="remove" role="presentation">&times;</span></li>');return a},c.prototype.update=function(a){if(this.clear(),0!==a.length){for(var b=[],c=0;c<a.length;c++){var d=a[c],e=this.display(d),f=this.selectionContainer();f.append(e),f.data("data",d),b.push(f)}this.$selection.find(".rendered-selection").append(b)}},c}),c("select2/selection/placeholder",["../utils"],function(){function a(a,b,c){this.placeholder=this.normalizePlaceholder(c.get("placeholder")),a.call(this,b,c)}return a.prototype.normalizePlaceholder=function(a,b){return"string"==typeof b&&(b={id:"",text:b}),b},a.prototype.update=function(a,b){var c=1==b.length&&b[0].id!=this.placeholder.id,d=b.length>1;if(d||c)return a.call(this,b);this.clear();var e=this.selectionContainer();e.html(this.display(this.placeholder)),e.addClass("placeholder").removeClass("choice"),this.$selection.find(".rendered-selection").append(e)},a}),c("select2/translation",[],function(){function a(a){this.dict=a||{}}return a.prototype.all=function(){return this.dict},a.prototype.get=function(a){return this.dict[a]},a.prototype.extend=function(a){this.dict=$.extend({},a.all(),this.dict)},a._cache={},a.loadPath=function(c){if(!(c in a._cache)){var d=b(c);a._cache[c]=d}return new a(a._cache[c])},a}),c("select2/data/base",["../utils"],function(a){function b(){b.__super__.constructor.call(this)}return a.Extend(b,a.Observable),b.prototype.current=function(){throw new Error("The `current` method must be defined in child classes.")},b.prototype.query=function(){throw new Error("The `query` method must be defined in child classes.")},b.prototype.bind=function(){},b.prototype.generateResultId=function(b,c){var d=b.id+"-result-";return d+=a.generateChars(4),d+=null!=c.id?"-"+c.id.toString():"-"+a.generateChars(4)},b}),c("select2/data/select",["./base","../utils","jquery"],function(a,b,c){function d(a){this.$element=a,d.__super__.constructor.call(this)}return b.Extend(d,a),d.prototype.current=function(a){var b=[],d=this;this.$element.find(":selected").each(function(){var a=c(this),e=d.item(a);b.push(e)}),a(b)},d.prototype.select=function(a){var b=this;if(this.$element.prop("multiple"))this.current(function(c){var d=[];a=[a],a.push.apply(a,c);for(var e=0;e<a.length;e++)id=a[e].id,-1===d.indexOf(id)&&d.push(id);b.$element.val(d),b.$element.trigger("change")});else{var c=a.id;this.$element.val(c),this.$element.trigger("change")}},d.prototype.unselect=function(a){var b=this;this.$element.prop("multiple")&&this.current(function(c){for(var d=[],e=0;e<c.length;e++)id=c[e].id,id!==a.id&&-1===d.indexOf(id)&&d.push(id);b.$element.val(d),b.$element.trigger("change")})},d.prototype.bind=function(a){var b=this;this.container=a,a.on("select",function(a){b.select(a.data)}),a.on("unselect",function(a){b.unselect(a.data)})},d.prototype.query=function(a,b){var d=[],e=this,f=this.$element.children();f.each(function(){var b=c(this);if(b.is("option")||b.is("optgroup")){var f=e.item(b),g=e.matches(a,f);null!==g&&d.push(g)}}),b(d)},d.prototype.option=function(a){var b=c("<option></option>");b.text(a.text),b.val(a.id),b.prop("disabled",a.disabled||!1);var d=this.item(b),e=c.extend({},a,d);return b.data("data",e),b},d.prototype.item=function(a){var b=a.data("data");if(null==b){if(a.is("option"))b={id:a.val(),text:a.html(),disabled:a.prop("disabled")};else if(a.is("optgroup")){b={text:a.attr("label"),children:[]};for(var d=a.children("option"),e=[],f=0;f<d.length;f++){var g=c(d[f]),h=this.item(g);e.push(h)}b.children=e}b.id&&null!=this.container&&(b._resultId=this.generateResultId(this.container,b)),a.data("data",b)}return b},d.prototype.matches=function(a,b){var d=c.extend(!0,{},b);if(b.children){for(var e=b.children.length-1;e>=0;e--){var f=b.children[e],g=this.matches(a,f);null===g&&d.children.splice(e,1)}if(d.children.length>0)return d}return""===c.trim(a.term)?d:b.text.toUpperCase().indexOf(a.term.toUpperCase())>-1?d:null},d}),c("select2/data/array",["./select","../utils","jquery"],function(a,b,c){function d(a,b){this.data=b.get("data"),d.__super__.constructor.call(this,a,b)}return b.Extend(d,a),d.prototype.select=function(a){var b=this;this.$element.find("option").each(function(){var d=c(this),e=b.item(d);e.id==a.id.toString()&&d.remove()});var e=this.option(a);this.$element.append(e),d.__super__.select.call(this,a)},d.prototype.query=function(a,b){var d=[],e=this;c.each(this.data,function(){var b=this;e.matches(a,b)&&d.push(b)}),b(d)},d}),c("select2/data/ajax",["./array","../utils","jquery"],function(a,b,c){function d(b,c){this.ajaxOptions=c.get("ajax"),this.processResults=this.ajaxOptions.processResults||function(a){return a},a.__super__.constructor.call(this,b,c)}return b.Extend(d,a),d.prototype.query=function(a,b){var d=this,e=c.extend({type:"GET"},this.ajaxOptions);"function"==typeof e.url&&(e.url=e.url(a)),"function"==typeof e.data&&(e.data=e.data(a));var f=c.ajax(e);f.success(function(a){var c=d.processResults(a);b(c)})},d}),c("select2/data/tags",[],function(){function a(a,b,c){c.get("tags");a.call(this,b,c)}return a.prototype.query=function(a,b,c){function d(a,f){for(var g=0;g<a.length;g++){var h=a[g],i=null!=h.children&&!d(h.children,!0),j=h.text===b.term;if(j||i)return f?!1:void c(a)}if(f)return!0;var k=e.createTag(b),l=e.option(k);l.attr("data-select2-tag",!0),e.$element.append(l),e.insertTag(a,k),c(a)}var e=this;return this._removeOldTags(),null==b.term||""===b.term||null!=b.page?void a.call(this,b,c):void a.call(this,b,d)},a.prototype.createTag=function(a,b){return{id:b.term,text:b.term}},a.prototype.insertTag=function(a,b,c){b.unshift(c)},a.prototype._removeOldTags=function(){var a=(this._lastTag,this.$element.find("option[data-select2-tag]"));a.each(function(){this.selected||$(this).remove()})},a}),c("select2/dropdown",["./utils"],function(a){function b(a){this.$element=a}return a.Extend(b,a.Observable),b.prototype.render=function(){var a=$('<span class="dropdown"><span class="results"></span></span>');return a},b.prototype.bind=function(){},b}),c("select2/dropdown/search",["../utils"],function(){function a(){}return a.prototype.render=function(a){var b=a.call(this),c=$('<span class="search"><input type="search" name="search" tabindex="-1" role="textbox" /></span>');return this.$searchContainer=c,this.$search=c.find("input"),b.prepend(c),b},a.prototype.bind=function(a,b,c){var d=this;a.call(this,b,c),this.$search.on("keydown",function(a){d.trigger("keypress",a),d._keyUpPrevented=a.isDefaultPrevented()}),this.$search.on("keyup",function(){d._keyUpPrevented||d.trigger("query",{term:$(this).val()}),d._keyUpPrevented=!1}),b.on("open",function(){d.$search.attr("tabindex",0)}),b.on("close",function(){d.$search.attr("tabindex",-1),d.$search.val("")}),b.on("results:all",function(a){if(null==a.query.term||""===a.query.term){var b=d.showSearch(a);b?d.$searchContainer.show():d.$searchContainer.hide()}})},a.prototype.showSearch=function(){return!0},a}),c("select2/dropdown/hidePlaceholder",[],function(){function a(a,b,c,d){this.placeholder=this.normalizePlaceholder(c.get("placeholder")),a.call(this,b,c,d)}return a.prototype.append=function(a,b){b=this.removePlaceholder(b),a.call(this,b)},a.prototype.normalizePlaceholder=function(a,b){return"string"==typeof b&&(b={id:"",text:b}),b},a.prototype.removePlaceholder=function(a,b){for(var c=b.slice(0),d=b.length-1;d>=0;d--){var e=b[d];this.placeholder.id===e.id&&c.splice(d,1)}return c},a}),c("select2/i18n/en",[],function(){return{noResults:function(){return"No results found"}}}),c("select2/defaults",["jquery","./results","./selection/single","./selection/multiple","./selection/placeholder","./utils","./translation","./data/select","./data/array","./data/ajax","./data/tags","./dropdown","./dropdown/search","./dropdown/hidePlaceholder","./i18n/en"],function(a,b,c,d,e,f,g,h,i,j,k,l,m,n){function o(){this.reset()}o.prototype.apply=function(o){if(o=a.extend({},this.defaults,o),null==o.dataAdapter&&(o.dataAdapter=o.ajax?j:o.data?i:h),null!=o.tags&&(o.dataAdapter=f.Decorate(o.dataAdapter,k)),null==o.resultsAdapter&&(o.resultsAdapter=b,null!=o.placeholder&&(o.resultsAdapter=f.Decorate(o.resultsAdapter,n))),null==o.dropdownAdapter){var p=f.Decorate(l,m);o.dropdownAdapter=p}if(null==o.selectionAdapter&&(o.selectionAdapter=o.multiple?d:c,null!=o.placeholder&&(o.selectionAdapter=f.Decorate(o.selectionAdapter,e))),"string"==typeof o.language&&(o.language=[o.language]),a.isArray(o.language)){for(var q=new g,r=o.language.concat(this.defaults.language),s=0;s<r.length;s++){var t=r[s],u={};try{u=g.loadPath(t)}catch(v){t="select2/i18n/"+t,u=g.loadPath(t)}q.extend(u)}o.translations=q}else o.translations=new Translations(o.language);return o},o.prototype.reset=function(){this.defaults={language:["select2/i18n/en"]}};var p=new o;return p}),c("select2/options",["./defaults"],function(a){function b(b,c){this.options=b,null!=c&&this.fromElement(c),this.options=a.apply(this.options)}return b.prototype.fromElement=function(a){return null==this.options.multiple&&(this.options.multiple=a.prop("multiple")),this},b.prototype.get=function(a){return this.options[a]},b.prototype.set=function(a,b){this.options[a]=b},b}),c("select2/core",["jquery","./options","./utils","./keys"],function(a,b,c,d){var e=function(a,c){this.$element=a,this.id=this._generateId(a),c=c||{},this.options=new b(c,a),e.__super__.constructor.call(this);var d=this.options.get("dataAdapter");this.data=new d(a,this.options);var f=this.render();this._placeContainer(f);var g=this.options.get("selectionAdapter");this.selection=new g(a,this.options);var h=this.selection.render();this._placeSelection(h);var i=this.options.get("dropdownAdapter");this.dropdown=new i(a,this.options);var j=this.dropdown.render();this._placeDropdown(j);var k=this.options.get("resultsAdapter");this.results=new k(a,this.options,this.data);var l=this.results.render();this._placeResults(l);var m=this;this._bindAdapters(),this._registerDomEvents(),this._registerSelectionEvents(),this._registerDropdownEvents(),this._registerResultsEvents(),this._registerEvents(),this.data.current(function(a){m.trigger("selection:update",{data:a})}),a.hide(),a.attr("tabindex","-1"),a.data("select2",this)};return c.Extend(e,c.Observable),e.prototype._generateId=function(a){var b="";return b=null!=a.attr("id")?a.attr("id"):null!=a.attr("name")?a.attr("name")+"-"+c.generateChars(2):c.generateChars(4),b="select2-"+b},e.prototype._placeContainer=function(a){a.insertAfter(this.$element),a.width(this.$element.outerWidth(!1))},e.prototype._placeSelection=function(a){var b=this.$container.find(".selection");b.append(a)},e.prototype._placeDropdown=function(a){this.$dropdown=a;var b=this.$container.find(".dropdown-wrapper");b.append(a)},e.prototype._placeResults=function(a){var b=this.$dropdown.find(".results");b.append(a)},e.prototype._bindAdapters=function(){this.data.bind(this,this.$container),this.selection.bind(this,this.$container),this.dropdown.bind(this,this.$container),this.results.bind(this,this.$container)},e.prototype._registerDomEvents=function(){var a=this;this.$element.on("change",function(){a.data.current(function(b){a.trigger("selection:update",{data:b})})})},e.prototype._registerSelectionEvents=function(){var a=this;this.selection.on("open",function(){a.open()}),this.selection.on("close",function(){a.close()}),this.selection.on("toggle",function(){a.toggleDropdown()}),this.selection.on("results:select",function(){a.trigger("results:select")}),this.selection.on("results:previous",function(){a.trigger("results:previous")}),this.selection.on("results:next",function(){a.trigger("results:next")}),this.selection.on("unselected",function(b){a.trigger("unselect",b),a.close()}),this.selection.on("keypress",function(b){a.trigger("keypress",b)})},e.prototype._registerDropdownEvents=function(){var a=this;this.dropdown.on("query",function(b){a.trigger("query",b)}),this.dropdown.on("keypress",function(b){a.trigger("keypress",b)})},e.prototype._registerResultsEvents=function(){var a=this;this.results.on("selected",function(b){a.trigger("select",b),a.close()}),this.results.on("unselected",function(b){a.trigger("unselect",b),a.close()}),this.results.on("results:focus",function(b){a.trigger("results:focus",b)})},e.prototype._registerEvents=function(){var a=this;this.on("open",function(){a.$container.addClass("open")}),this.on("close",function(){a.$container.removeClass("open")}),this.on("query",function(b){this.data.query(b,function(c){a.trigger("results:all",{data:c,query:b})})}),this.on("keypress",function(b){var c=b.which;a.isOpen()?c===d.ENTER?(a.trigger("results:select"),b.preventDefault()):c===d.UP?(a.trigger("results:previous"),b.preventDefault()):c===d.DOWN?(a.trigger("results:next"),b.preventDefault()):(c===d.ESC||c===d.TAB)&&(a.close(),b.preventDefault()):(c===d.ENTER||c===d.SPACE)&&(a.open(),b.preventDefault())})},e.prototype.toggleDropdown=function(){this.isOpen()?this.close():this.open()},e.prototype.open=function(){this.isOpen()||(this.trigger("query",{}),this.trigger("open"))},e.prototype.close=function(){this.isOpen()&&this.trigger("close")},e.prototype.isOpen=function(){return this.$container.hasClass("open")},e.prototype.render=function(){var b=a('<span class="select2 select2-container select2-theme-default"><span class="selection"></span><span class="dropdown-wrapper" aria-hidden="true"></span></span>');return this.$container=b,b.data("element",this.$element),b},e}),c("jquery.select2",["jquery","select2/core"],function(a,b){return null==a.fn.select2&&(a.fn.select2=function(c){if(c=c||{},"object"==typeof c)this.each(function(){new b(a(this),c)});else{if("string"!=typeof c)throw new Error("Invalid arguments for Select2: "+c);var d=this.data("select2"),e=Array.prototype.slice.call(arguments,1);d[c](e)}}),b}),b("jquery.select2"),$.fn.select2.amd={define:c,require:b}}();
\ No newline at end of file
diff --git a/src/js/select2/core.js b/src/js/select2/core.js
index 7ee8d9b9..43eaa564 100644
--- a/src/js/select2/core.js
+++ b/src/js/select2/core.js
@@ -227,22 +227,26 @@ define([
       var key = evt.which;
 
       if (self.isOpen()) {
-        if (key == KEYS.ENTER) {
+        if (key === KEYS.ENTER) {
           self.trigger('results:select');
 
           evt.preventDefault();
-        } else if (key == KEYS.UP) {
+        } else if (key === KEYS.UP) {
           self.trigger('results:previous');
 
           evt.preventDefault();
-        } else if (key == KEYS.DOWN) {
+        } else if (key === KEYS.DOWN) {
           self.trigger('results:next');
 
+          evt.preventDefault();
+        } else if (key === KEYS.ESC || key === KEYS.TAB) {
+          self.close();
+
           evt.preventDefault();
         }
       } else {
-        if (key == KEYS.ENTER || key == KEYS.SPACE) {
-          self.trigger('open');
+        if (key === KEYS.ENTER || key === KEYS.SPACE) {
+          self.open();
 
           evt.preventDefault();
         }
diff --git a/src/js/select2/dropdown/search.js b/src/js/select2/dropdown/search.js
index 9d7a81b8..52b65149 100644
--- a/src/js/select2/dropdown/search.js
+++ b/src/js/select2/dropdown/search.js
@@ -25,16 +25,20 @@ define([
 
     decorated.call(this, container, $container);
 
-    this.$search.on('keyup', function (evt) {
+    this.$search.on('keydown', function (evt) {
       self.trigger('keypress', evt);
 
-      if (evt.isDefaultPrevented()) {
-        return;
+      self._keyUpPrevented = evt.isDefaultPrevented();
+    });
+
+    this.$search.on('keyup', function (evt) {
+      if (!self._keyUpPrevented) {
+        self.trigger('query', {
+          term: $(this).val()
+        });
       }
 
-      self.trigger('query', {
-        term: $(this).val()
-      });
+      self._keyUpPrevented = false;
     });
 
     container.on('open', function () {
diff --git a/src/js/select2/selection/single.js b/src/js/select2/selection/single.js
index 13ec02ba..9500692a 100644
--- a/src/js/select2/selection/single.js
+++ b/src/js/select2/selection/single.js
@@ -1,7 +1,8 @@
 define([
   './base',
-  '../utils'
-], function (BaseSelection, Utils) {
+  '../utils',
+  '../keys'
+], function (BaseSelection, Utils, KEYS) {
   function SingleSelection () {
     SingleSelection.__super__.constructor.apply(this, arguments);
   }
@@ -69,6 +70,10 @@ define([
 
     this.$selection.on('keydown', function (evt) {
       self.trigger('keypress', evt);
+
+      if (evt.which === KEYS.SPACE) {
+        evt.preventDefault();
+      }
     });
 
     container.on('results:focus', function (params) {