diff --git a/index.js b/index.js
index 14f66e4..4f8bd33 100644
--- a/index.js
+++ b/index.js
@@ -24,7 +24,7 @@ function Compare(a, b, options) {
   this._setPosition(this._bounds.width / 2);
   syncMove(a, b);
 
-  b.on('resize', function() {
+  b.on('resize', function () {
     this._bounds = b.getContainer().getBoundingClientRect();
     if (this._x) this._setPosition(this._x);
   }.bind(this));
@@ -39,12 +39,49 @@ function Compare(a, b, options) {
 }
 
 Compare.prototype = {
-  _setPointerEvents: function(v) {
+   /**
+   * Allows for custom full screen button.
+   * @param a The map on the left.
+   * @param b The map on the right.
+   * @param originId The id of the div where both the maps originated from.
+   */
+  fullscreen: function (a, b, originId) {
+
+    // see if we have a full screen div
+    var fsc = document.getElementById('mapboxgl-compare-fullscreen');
+
+    // if full screen div found, put the maps back into the origin div
+    if (fsc) {
+      // get origin div
+      var origin = document.getElementById(originId);
+
+      // add maps back to origin div
+      origin.appendChild(a.getContainer());
+      origin.appendChild(b.getContainer());
+
+      // remove full screen container
+      document.body.removeChild(fsc);
+    } else {
+
+      // create full screen container and append maps to it
+      fsc = document.createElement('div');
+      fsc.className = 'mapboxgl-compare-fullscreen';
+      fsc.id = 'mapboxgl-compare-fullscreen';
+      fsc.appendChild(a.getContainer());
+      fsc.appendChild(b.getContainer());
+      document.body.appendChild(fsc);
+    }
+
+    // resize the maps
+    a.resize();
+    b.resize();
+  },
+  _setPointerEvents: function (v) {
     this._container.style.pointerEvents = v;
     this._swiper.style.pointerEvents = v;
   },
 
-  _onDown: function(e) {
+  _onDown: function (e) {
     if (e.touches) {
       document.addEventListener('touchmove', this._onMove);
       document.addEventListener('touchend', this._onTouchEnd);
@@ -54,7 +91,7 @@ Compare.prototype = {
     }
   },
 
-  _setPosition: function(x) {
+  _setPosition: function (x) {
     x = Math.min(x, this._bounds.width);
     var pos = 'translate(' + x + 'px, 0)';
     this._container.style.transform = pos;
@@ -63,7 +100,7 @@ Compare.prototype = {
     this._x = x;
   },
 
-  _onMove: function(e) {
+  _onMove: function (e) {
     if (this.options && this.options.mousemove) {
       this._setPointerEvents(e.touches ? 'auto' : 'none');
     }
@@ -71,17 +108,17 @@ Compare.prototype = {
     this._setPosition(this._getX(e));
   },
 
-  _onMouseUp: function() {
+  _onMouseUp: function () {
     document.removeEventListener('mousemove', this._onMove);
     document.removeEventListener('mouseup', this._onMouseUp);
   },
 
-  _onTouchEnd: function() {
+  _onTouchEnd: function () {
     document.removeEventListener('touchmove', this._onMove);
     document.removeEventListener('touchend', this._onTouchEnd);
   },
 
-  _getX: function(e) {
+  _getX: function (e) {
     e = e.touches ? e.touches[0] : e;
     var x = e.clientX - this._bounds.left;
     if (x < 0) x = 0;
diff --git a/style.css b/style.css
index 53321aa..215e5bc 100644
--- a/style.css
+++ b/style.css
@@ -1,22 +1,35 @@
 .mapboxgl-compare {
-  background-color:#fff;
-  position:absolute;
-  width:2px;
-  height:100%;
-  z-index:1;
-  }
-.mapboxgl-compare .compare-swiper {
-  background-color:#3887be;
-  box-shadow:inset 0 0 0 2px #fff;
-  display:inline-block;
-  border-radius:50%;
-  position:absolute;
-  width:60px;
-  height:60px;
-  top:50%;
-  left:-30px;
-  margin:-30px 1px 0;
+  background-color: #fff;
+  position: absolute;
+  width: 2px;
+  height: 100%;
+  z-index: 1;
+}
+
+.compare-swiper {
+  background-color: #3887be;
+  box-shadow: inset 0 0 0 2px #fff;
+  display: inline-block;
+  border-radius: 50%;
+  position: absolute;
+  width: 60px;
+  height: 60px;
+  top: 50%;
+  left: -30px;
+  margin: -30px 1px 0;
   color: #fff;
-  cursor:ew-resize;
-	background-image:url(data:image/svg+xml;base64,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);
-  }
+  cursor: ew-resize;
+  background-image: url(data:image/svg+xml;base64,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);
+}
+
+.mapboxgl-compare-fullscreen {
+  display: block !important;
+  z-index: 999 !important;
+  position: fixed !important;
+  width: 100% !important;
+  height: 100% !important;
+  top: 0 !important;
+  right: 0 !important;
+  left: 0 !important;
+  bottom: 0 !important;
+}