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diff --git a/dist/cjs/mq4-hover-hover-shim.js b/dist/cjs/mq4-hover-hover-shim.js
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+++ b/dist/cjs/mq4-hover-hover-shim.js
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+"use strict";
+
+exports.supportsTrueHover = supportsTrueHover;
+/*eslint-env browser */
+/* jshint browser: true, esnext: true */
+
+/**
+* Does this UA's primary pointer support true hovering
+* OR does the UA at least not try to quirkily emulate hovering,
+* such that :hover CSS styles are appropriate?
+* Essentially tries to shim the `@media (hover: hover)` CSS media query feature.
+* @type {boolean}
+*/
+function supportsTrueHover() {
+  if (!window.matchMedia) {
+    // Ancient non-IE, or IE<=9, per http://caniuse.com/#feat=matchmedia
+    var ua = navigator.userAgent;
+    var isIE9mobileInMobileMode = ua.indexOf("MSIE 9.0") > -1 && (ua.indexOf("XBLWP7") > -1 || ua.indexOf("ZuneWP7") > -1);
+    if (isIE9mobileInMobileMode) {
+      // FIXME: IE9 Mobile in Mobile mode; force hoverEnabled to false???
+      return false;
+    }
+    // UA is ancient enough to probably be a desktop computer or at least not attempt emulation of hover.
+    return true;
+  }
+
+  // CSSWG Media Queries Level 4 draft
+  //     http://drafts.csswg.org/mediaqueries/#hover
+  // FIXME: WTF Chrome...: https://code.google.com/p/chromium/issues/detail?id=441613
+  if (window.matchMedia("(hover: none),(-moz-hover: none),(-ms-hover: none),(-webkit-hover: none)," + "(hover: on-demand),(-moz-hover: on-demand),(-ms-hover: on-demand),(-webkit-hover: on-demand)").matches) {
+    // true hovering explicitly not supported by primary pointer
+    return false;
+  }
+  if (window.matchMedia("(hover: hover),(-moz-hover: hover),(-ms-hover: hover),(-webkit-hover: hover)").matches) {
+    // true hovering explicitly supported by primary pointer
+    return true;
+  }
+  // `hover` media feature not implemented by this browser; keep probing
+
+  // Touch generally implies that hovering is merely emulated,
+  // which doesn't count as true hovering support for our purposes
+  // due to the quirkiness of the emulation (e.g. :hover being sticky).
+
+  // W3C Pointer Events LC WD, 13 November 2014
+  //     http://www.w3.org/TR/2014/WD-pointerevents-20141113/
+  // Prefixed in IE10, per http://caniuse.com/#feat=pointer
+  var supportsPointerEvents = window.PointerEvent || window.MSPointerEvent;
+  if (supportsPointerEvents) {
+    var pointerEventsIsTouch = (window.navigator.maxTouchPoints || window.navigator.msMaxTouchPoints) > 0;
+    return !pointerEventsIsTouch;
+  }
+
+  // Mozilla's -moz-touch-enabled
+  //     https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Media_queries#-moz-touch-enabled
+  if (window.matchMedia("(touch-enabled),(-moz-touch-enabled),(-ms-touch-enabled),(-webkit-touch-enabled)").matches) {
+    return false;
+  }
+
+  // W3C Touch Events
+  //     http://www.w3.org/TR/2013/REC-touch-events-20131010/
+  if ("ontouchstart" in window) {
+    return false;
+  }
+
+  // OPEN ISSUE: Should we look for IE's "Touch" userAgent token?
+  // OPEN ISSUE: IE10 Mobile?
+
+  // UA's pointer is non-touch and thus likely either supports true hovering or at least does not try to emulate it.
+  return true;
+}
+\ No newline at end of file