diff --git a/bower.json b/bower.json
index 531208f..864e114 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "tether-drop",
-  "version": "1.3.1",
+  "version": "1.4.0",
   "homepage": "https://github.com/HubSpot/drop",
   "authors": [
     "Adam Schwartz <adam.flynn.schwartz@gmail.com>",
diff --git a/dist/js/drop.js b/dist/js/drop.js
index b0a973d..8af950c 100644
--- a/dist/js/drop.js
+++ b/dist/js/drop.js
@@ -1,4 +1,4 @@
-/*! tether-drop 1.3.1 */
+/*! tether-drop 1.4.0 */
 
 (function(root, factory) {
   if (typeof define === 'function' && define.amd) {
@@ -20,7 +20,7 @@ var _slicedToArray = (function () { function sliceIterator(arr, i) { var _arr =
 
 var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();
 
-var _get = function get(_x2, _x3, _x4) { var _again = true; _function: while (_again) { var object = _x2, property = _x3, receiver = _x4; desc = parent = getter = undefined; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x2 = parent; _x3 = property; _x4 = receiver; _again = true; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } };
+var _get = function get(_x2, _x3, _x4) { var _again = true; _function: while (_again) { var object = _x2, property = _x3, receiver = _x4; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x2 = parent; _x3 = property; _x4 = receiver; _again = true; desc = parent = undefined; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } };
 
 function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }
 
@@ -407,6 +407,10 @@ function createContext() {
       value: function open(event) {
         var _this3 = this;
 
+        if (typeof this.options.showOn !== 'undefined' && !this.options.showOn()) {
+          return;
+        }
+
         if (this.isOpened()) {
           return;
         }
diff --git a/dist/js/drop.min.js b/dist/js/drop.min.js
index 5a227e3..af14428 100644
--- a/dist/js/drop.min.js
+++ b/dist/js/drop.min.js
@@ -1 +1 @@
-!function(t,e){"function"==typeof define&&define.amd?define(["tether"],e):"object"==typeof exports?module.exports=e(require("tether")):t.Drop=e(t.Tether)}(this,function(t){"use strict";function e(t,e){if(!(t instanceof e))throw new TypeError("Cannot call a class as a function")}function n(t,e){if("function"!=typeof e&&null!==e)throw new TypeError("Super expression must either be null or a function, not "+typeof e);t.prototype=Object.create(e&&e.prototype,{constructor:{value:t,enumerable:!1,writable:!0,configurable:!0}}),e&&(Object.setPrototypeOf?Object.setPrototypeOf(t,e):t.__proto__=e)}function o(t){var e=t.split(" "),n=a(e,2),o=n[0],i=n[1];if(["left","right"].indexOf(o)>=0){var s=[i,o];o=s[0],i=s[1]}return[o,i].join(" ")}function i(t,e){for(var n=void 0,o=[];-1!==(n=t.indexOf(e));)o.push(t.splice(n,1));return o}function s(){var a=arguments.length<=0||void 0===arguments[0]?{}:arguments[0],u=function(){for(var t=arguments.length,e=Array(t),n=0;t>n;n++)e[n]=arguments[n];return new(r.apply(b,[null].concat(e)))};p(u,{createContext:s,drops:[],defaults:{}});var g={classPrefix:"drop",defaults:{position:"bottom left",openOn:"click",beforeClose:null,constrainToScrollParent:!0,constrainToWindow:!0,classes:"",remove:!1,tetherOptions:{}}};p(u,g,a),p(u.defaults,g.defaults,a.defaults),"undefined"==typeof x[u.classPrefix]&&(x[u.classPrefix]=[]),u.updateBodyClasses=function(){for(var t=!1,e=x[u.classPrefix],n=e.length,o=0;n>o;++o)if(e[o].isOpened()){t=!0;break}t?d(document.body,u.classPrefix+"-open"):c(document.body,u.classPrefix+"-open")};var b=function(s){function r(t){if(e(this,r),l(Object.getPrototypeOf(r.prototype),"constructor",this).call(this),this.options=p({},u.defaults,t),this.target=this.options.target,"undefined"==typeof this.target)throw new Error("Drop Error: You must provide a target.");var n="data-"+u.classPrefix,o=this.target.getAttribute(n);o&&(this.options.content=o);for(var i=["position","openOn"],s=0;s<i.length;++s){var a=this.target.getAttribute(n+"-"+i[s]);a&&(this.options[i[s]]=a)}this.options.classes&&this.options.addTargetClasses!==!1&&d(this.target,this.options.classes),u.drops.push(this),x[u.classPrefix].push(this),this._boundEvents=[],this.bindMethods(),this.setupElements(),this.setupEvents(),this.setupTether()}return n(r,s),h(r,[{key:"_on",value:function(t,e,n){this._boundEvents.push({element:t,event:e,handler:n}),t.addEventListener(e,n)}},{key:"bindMethods",value:function(){this.transitionEndHandler=this._transitionEndHandler.bind(this)}},{key:"setupElements",value:function(){var t=this;if(this.drop=document.createElement("div"),d(this.drop,u.classPrefix),this.options.classes&&d(this.drop,this.options.classes),this.content=document.createElement("div"),d(this.content,u.classPrefix+"-content"),"function"==typeof this.options.content){var e=function(){var e=t.options.content.call(t,t);if("string"==typeof e)t.content.innerHTML=e;else{if("object"!=typeof e)throw new Error("Drop Error: Content function should return a string or HTMLElement.");t.content.innerHTML="",t.content.appendChild(e)}};e(),this.on("open",e.bind(this))}else"object"==typeof this.options.content?this.content.appendChild(this.options.content):this.content.innerHTML=this.options.content;this.drop.appendChild(this.content)}},{key:"setupTether",value:function(){var e=this.options.position.split(" ");e[0]=E[e[0]],e=e.join(" ");var n=[];this.options.constrainToScrollParent?n.push({to:"scrollParent",pin:"top, bottom",attachment:"together none"}):n.push({to:"scrollParent"}),this.options.constrainToWindow!==!1?n.push({to:"window",attachment:"together"}):n.push({to:"window"});var i={element:this.drop,target:this.target,attachment:o(e),targetAttachment:o(this.options.position),classPrefix:u.classPrefix,offset:"0 0",targetOffset:"0 0",enabled:!1,constraints:n,addTargetClasses:this.options.addTargetClasses};this.options.tetherOptions!==!1&&(this.tether=new t(p({},i,this.options.tetherOptions)))}},{key:"setupEvents",value:function(){var t=this;if(this.options.openOn){if("always"===this.options.openOn)return void setTimeout(this.open.bind(this));var e=this.options.openOn.split(" ");if(e.indexOf("click")>=0)for(var n=function(e){t.toggle(e),e.preventDefault()},o=function(e){t.isOpened()&&(e.target===t.drop||t.drop.contains(e.target)||e.target===t.target||t.target.contains(e.target)||t.close(e))},i=0;i<y.length;++i){var s=y[i];this._on(this.target,s,n),this._on(document,s,o)}var r=!1,a=null,h=function(e){r=!0,t.open(e)},l=function(e){r=!1,"undefined"!=typeof a&&clearTimeout(a),a=setTimeout(function(){r||t.close(e),a=null},50)};e.indexOf("hover")>=0&&(this._on(this.target,"mouseover",h),this._on(this.drop,"mouseover",h),this._on(this.target,"mouseout",l),this._on(this.drop,"mouseout",l)),e.indexOf("focus")>=0&&(this._on(this.target,"focus",h),this._on(this.drop,"focus",h),this._on(this.target,"blur",l),this._on(this.drop,"blur",l))}}},{key:"isOpened",value:function(){return this.drop?f(this.drop,u.classPrefix+"-open"):void 0}},{key:"toggle",value:function(t){this.isOpened()?this.close(t):this.open(t)}},{key:"open",value:function(t){var e=this;this.isOpened()||(this.drop.parentNode||document.body.appendChild(this.drop),"undefined"!=typeof this.tether&&this.tether.enable(),d(this.drop,u.classPrefix+"-open"),d(this.drop,u.classPrefix+"-open-transitionend"),setTimeout(function(){e.drop&&d(e.drop,u.classPrefix+"-after-open")}),"undefined"!=typeof this.tether&&this.tether.position(),this.trigger("open"),u.updateBodyClasses())}},{key:"_transitionEndHandler",value:function(t){t.target===t.currentTarget&&(f(this.drop,u.classPrefix+"-open")||c(this.drop,u.classPrefix+"-open-transitionend"),this.drop.removeEventListener(m,this.transitionEndHandler))}},{key:"beforeCloseHandler",value:function(t){var e=!0;return this.isClosing||"function"!=typeof this.options.beforeClose||(this.isClosing=!0,e=this.options.beforeClose(t,this)!==!1),this.isClosing=!1,e}},{key:"close",value:function(t){this.isOpened()&&this.beforeCloseHandler(t)&&(c(this.drop,u.classPrefix+"-open"),c(this.drop,u.classPrefix+"-after-open"),this.drop.addEventListener(m,this.transitionEndHandler),this.trigger("close"),"undefined"!=typeof this.tether&&this.tether.disable(),u.updateBodyClasses(),this.options.remove&&this.remove(t))}},{key:"remove",value:function(t){this.close(t),this.drop.parentNode&&this.drop.parentNode.removeChild(this.drop)}},{key:"position",value:function(){this.isOpened()&&"undefined"!=typeof this.tether&&this.tether.position()}},{key:"destroy",value:function(){this.remove(),"undefined"!=typeof this.tether&&this.tether.destroy();for(var t=0;t<this._boundEvents.length;++t){var e=this._boundEvents[t],n=e.element,o=e.event,s=e.handler;n.removeEventListener(o,s)}this._boundEvents=[],this.tether=null,this.drop=null,this.content=null,this.target=null,i(x[u.classPrefix],this),i(u.drops,this)}}]),r}(v);return u}var r=Function.prototype.bind,a=function(){function t(t,e){var n=[],o=!0,i=!1,s=void 0;try{for(var r,a=t[Symbol.iterator]();!(o=(r=a.next()).done)&&(n.push(r.value),!e||n.length!==e);o=!0);}catch(h){i=!0,s=h}finally{try{!o&&a["return"]&&a["return"]()}finally{if(i)throw s}}return n}return function(e,n){if(Array.isArray(e))return e;if(Symbol.iterator in Object(e))return t(e,n);throw new TypeError("Invalid attempt to destructure non-iterable instance")}}(),h=function(){function t(t,e){for(var n=0;n<e.length;n++){var o=e[n];o.enumerable=o.enumerable||!1,o.configurable=!0,"value"in o&&(o.writable=!0),Object.defineProperty(t,o.key,o)}}return function(e,n,o){return n&&t(e.prototype,n),o&&t(e,o),e}}(),l=function(t,e,n){for(var o=!0;o;){var i=t,s=e,r=n;a=l=h=void 0,o=!1,null===i&&(i=Function.prototype);var a=Object.getOwnPropertyDescriptor(i,s);if(void 0!==a){if("value"in a)return a.value;var h=a.get;return void 0===h?void 0:h.call(r)}var l=Object.getPrototypeOf(i);if(null===l)return void 0;t=l,e=s,n=r,o=!0}},u=t.Utils,p=u.extend,d=u.addClass,c=u.removeClass,f=u.hasClass,v=u.Evented,y=["click"];"ontouchstart"in document.documentElement&&y.push("touchstart");var g={WebkitTransition:"webkitTransitionEnd",MozTransition:"transitionend",OTransition:"otransitionend",transition:"transitionend"},m="";for(var b in g)if({}.hasOwnProperty.call(g,b)){var O=document.createElement("p");"undefined"!=typeof O.style[b]&&(m=g[b])}var E={left:"right",right:"left",top:"bottom",bottom:"top",middle:"middle",center:"center"},x={},P=s();return document.addEventListener("DOMContentLoaded",function(){P.updateBodyClasses()}),P});
\ No newline at end of file
+!function(t,e){"function"==typeof define&&define.amd?define(["tether"],e):"object"==typeof exports?module.exports=e(require("tether")):t.Drop=e(t.Tether)}(this,function(t){"use strict";function e(t,e){if(!(t instanceof e))throw new TypeError("Cannot call a class as a function")}function n(t,e){if("function"!=typeof e&&null!==e)throw new TypeError("Super expression must either be null or a function, not "+typeof e);t.prototype=Object.create(e&&e.prototype,{constructor:{value:t,enumerable:!1,writable:!0,configurable:!0}}),e&&(Object.setPrototypeOf?Object.setPrototypeOf(t,e):t.__proto__=e)}function o(t){var e=t.split(" "),n=a(e,2),o=n[0],i=n[1];if(["left","right"].indexOf(o)>=0){var s=[i,o];o=s[0],i=s[1]}return[o,i].join(" ")}function i(t,e){for(var n=void 0,o=[];-1!==(n=t.indexOf(e));)o.push(t.splice(n,1));return o}function s(){var a=arguments.length<=0||void 0===arguments[0]?{}:arguments[0],p=function(){for(var t=arguments.length,e=Array(t),n=0;t>n;n++)e[n]=arguments[n];return new(r.apply(b,[null].concat(e)))};u(p,{createContext:s,drops:[],defaults:{}});var g={classPrefix:"drop",defaults:{position:"bottom left",openOn:"click",beforeClose:null,constrainToScrollParent:!0,constrainToWindow:!0,classes:"",remove:!1,tetherOptions:{}}};u(p,g,a),u(p.defaults,g.defaults,a.defaults),"undefined"==typeof x[p.classPrefix]&&(x[p.classPrefix]=[]),p.updateBodyClasses=function(){for(var t=!1,e=x[p.classPrefix],n=e.length,o=0;n>o;++o)if(e[o].isOpened()){t=!0;break}t?d(document.body,p.classPrefix+"-open"):c(document.body,p.classPrefix+"-open")};var b=function(s){function r(t){if(e(this,r),l(Object.getPrototypeOf(r.prototype),"constructor",this).call(this),this.options=u({},p.defaults,t),this.target=this.options.target,"undefined"==typeof this.target)throw new Error("Drop Error: You must provide a target.");var n="data-"+p.classPrefix,o=this.target.getAttribute(n);o&&(this.options.content=o);for(var i=["position","openOn"],s=0;s<i.length;++s){var a=this.target.getAttribute(n+"-"+i[s]);a&&(this.options[i[s]]=a)}this.options.classes&&this.options.addTargetClasses!==!1&&d(this.target,this.options.classes),p.drops.push(this),x[p.classPrefix].push(this),this._boundEvents=[],this.bindMethods(),this.setupElements(),this.setupEvents(),this.setupTether()}return n(r,s),h(r,[{key:"_on",value:function(t,e,n){this._boundEvents.push({element:t,event:e,handler:n}),t.addEventListener(e,n)}},{key:"bindMethods",value:function(){this.transitionEndHandler=this._transitionEndHandler.bind(this)}},{key:"setupElements",value:function(){var t=this;if(this.drop=document.createElement("div"),d(this.drop,p.classPrefix),this.options.classes&&d(this.drop,this.options.classes),this.content=document.createElement("div"),d(this.content,p.classPrefix+"-content"),"function"==typeof this.options.content){var e=function(){var e=t.options.content.call(t,t);if("string"==typeof e)t.content.innerHTML=e;else{if("object"!=typeof e)throw new Error("Drop Error: Content function should return a string or HTMLElement.");t.content.innerHTML="",t.content.appendChild(e)}};e(),this.on("open",e.bind(this))}else"object"==typeof this.options.content?this.content.appendChild(this.options.content):this.content.innerHTML=this.options.content;this.drop.appendChild(this.content)}},{key:"setupTether",value:function(){var e=this.options.position.split(" ");e[0]=E[e[0]],e=e.join(" ");var n=[];this.options.constrainToScrollParent?n.push({to:"scrollParent",pin:"top, bottom",attachment:"together none"}):n.push({to:"scrollParent"}),this.options.constrainToWindow!==!1?n.push({to:"window",attachment:"together"}):n.push({to:"window"});var i={element:this.drop,target:this.target,attachment:o(e),targetAttachment:o(this.options.position),classPrefix:p.classPrefix,offset:"0 0",targetOffset:"0 0",enabled:!1,constraints:n,addTargetClasses:this.options.addTargetClasses};this.options.tetherOptions!==!1&&(this.tether=new t(u({},i,this.options.tetherOptions)))}},{key:"setupEvents",value:function(){var t=this;if(this.options.openOn){if("always"===this.options.openOn)return void setTimeout(this.open.bind(this));var e=this.options.openOn.split(" ");if(e.indexOf("click")>=0)for(var n=function(e){t.toggle(e),e.preventDefault()},o=function(e){t.isOpened()&&(e.target===t.drop||t.drop.contains(e.target)||e.target===t.target||t.target.contains(e.target)||t.close(e))},i=0;i<y.length;++i){var s=y[i];this._on(this.target,s,n),this._on(document,s,o)}var r=!1,a=null,h=function(e){r=!0,t.open(e)},l=function(e){r=!1,"undefined"!=typeof a&&clearTimeout(a),a=setTimeout(function(){r||t.close(e),a=null},50)};e.indexOf("hover")>=0&&(this._on(this.target,"mouseover",h),this._on(this.drop,"mouseover",h),this._on(this.target,"mouseout",l),this._on(this.drop,"mouseout",l)),e.indexOf("focus")>=0&&(this._on(this.target,"focus",h),this._on(this.drop,"focus",h),this._on(this.target,"blur",l),this._on(this.drop,"blur",l))}}},{key:"isOpened",value:function(){return this.drop?f(this.drop,p.classPrefix+"-open"):void 0}},{key:"toggle",value:function(t){this.isOpened()?this.close(t):this.open(t)}},{key:"open",value:function(t){var e=this;("undefined"==typeof this.options.showOn||this.options.showOn())&&(this.isOpened()||(this.drop.parentNode||document.body.appendChild(this.drop),"undefined"!=typeof this.tether&&this.tether.enable(),d(this.drop,p.classPrefix+"-open"),d(this.drop,p.classPrefix+"-open-transitionend"),setTimeout(function(){e.drop&&d(e.drop,p.classPrefix+"-after-open")}),"undefined"!=typeof this.tether&&this.tether.position(),this.trigger("open"),p.updateBodyClasses()))}},{key:"_transitionEndHandler",value:function(t){t.target===t.currentTarget&&(f(this.drop,p.classPrefix+"-open")||c(this.drop,p.classPrefix+"-open-transitionend"),this.drop.removeEventListener(m,this.transitionEndHandler))}},{key:"beforeCloseHandler",value:function(t){var e=!0;return this.isClosing||"function"!=typeof this.options.beforeClose||(this.isClosing=!0,e=this.options.beforeClose(t,this)!==!1),this.isClosing=!1,e}},{key:"close",value:function(t){this.isOpened()&&this.beforeCloseHandler(t)&&(c(this.drop,p.classPrefix+"-open"),c(this.drop,p.classPrefix+"-after-open"),this.drop.addEventListener(m,this.transitionEndHandler),this.trigger("close"),"undefined"!=typeof this.tether&&this.tether.disable(),p.updateBodyClasses(),this.options.remove&&this.remove(t))}},{key:"remove",value:function(t){this.close(t),this.drop.parentNode&&this.drop.parentNode.removeChild(this.drop)}},{key:"position",value:function(){this.isOpened()&&"undefined"!=typeof this.tether&&this.tether.position()}},{key:"destroy",value:function(){this.remove(),"undefined"!=typeof this.tether&&this.tether.destroy();for(var t=0;t<this._boundEvents.length;++t){var e=this._boundEvents[t],n=e.element,o=e.event,s=e.handler;n.removeEventListener(o,s)}this._boundEvents=[],this.tether=null,this.drop=null,this.content=null,this.target=null,i(x[p.classPrefix],this),i(p.drops,this)}}]),r}(v);return p}var r=Function.prototype.bind,a=function(){function t(t,e){var n=[],o=!0,i=!1,s=void 0;try{for(var r,a=t[Symbol.iterator]();!(o=(r=a.next()).done)&&(n.push(r.value),!e||n.length!==e);o=!0);}catch(h){i=!0,s=h}finally{try{!o&&a["return"]&&a["return"]()}finally{if(i)throw s}}return n}return function(e,n){if(Array.isArray(e))return e;if(Symbol.iterator in Object(e))return t(e,n);throw new TypeError("Invalid attempt to destructure non-iterable instance")}}(),h=function(){function t(t,e){for(var n=0;n<e.length;n++){var o=e[n];o.enumerable=o.enumerable||!1,o.configurable=!0,"value"in o&&(o.writable=!0),Object.defineProperty(t,o.key,o)}}return function(e,n,o){return n&&t(e.prototype,n),o&&t(e,o),e}}(),l=function(t,e,n){for(var o=!0;o;){var i=t,s=e,r=n;o=!1,null===i&&(i=Function.prototype);var a=Object.getOwnPropertyDescriptor(i,s);if(void 0!==a){if("value"in a)return a.value;var h=a.get;return void 0===h?void 0:h.call(r)}var l=Object.getPrototypeOf(i);if(null===l)return void 0;t=l,e=s,n=r,o=!0,a=l=void 0}},p=t.Utils,u=p.extend,d=p.addClass,c=p.removeClass,f=p.hasClass,v=p.Evented,y=["click"];"ontouchstart"in document.documentElement&&y.push("touchstart");var g={WebkitTransition:"webkitTransitionEnd",MozTransition:"transitionend",OTransition:"otransitionend",transition:"transitionend"},m="";for(var b in g)if({}.hasOwnProperty.call(g,b)){var O=document.createElement("p");"undefined"!=typeof O.style[b]&&(m=g[b])}var E={left:"right",right:"left",top:"bottom",bottom:"top",middle:"middle",center:"center"},x={},P=s();return document.addEventListener("DOMContentLoaded",function(){P.updateBodyClasses()}),P});
\ No newline at end of file
diff --git a/package.json b/package.json
index 6653240..d740966 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "tether-drop",
-  "version": "1.3.1",
+  "version": "1.4.0",
   "description": "Client-side library for creating dropdowns",
   "authors": [
     "Zack Bloom <zackbloom@gmail.com>",
diff --git a/src/js/drop.js b/src/js/drop.js
index 1205233..1422a2c 100644
--- a/src/js/drop.js
+++ b/src/js/drop.js
@@ -350,6 +350,10 @@ function createContext(options={}) {
     }
 
     open(event) {
+      if (typeof this.options.showOn !== 'undefined' && !this.options.showOn()) {
+        return;
+      }
+
       if (this.isOpened()) {
         return;
       }