Updated dependencies and adjusted code to standard

index.js

   return (arg === 'undefined') ? [] : Array.isArray(arg) ? arg : [arg]
 }
 
-function noop () {
-  return
-}
+function noop () {}
 
 L.Control.SideBySide = L.Control.extend({
   options: {
       return this
     }
     if (this._leftLayer) {
-      this._leftLayer.getContainer().style.clip = ""
+      this._leftLayer.getContainer().style.clip = ''
     }
     if (this._rightLayer) {
-      this._rightLayer.getContainer().style.clip = ""
+      this._rightLayer.getContainer().style.clip = ''
     }
     this._removeEvents()
     L.DomUtil.remove(this._container)

leaflet-side-by-side.js

   return (arg === 'undefined') ? [] : Array.isArray(arg) ? arg : [arg]
 }
 
-function noop () {
-  return
-}
+function noop () {}
 
 L.Control.SideBySide = L.Control.extend({
   options: {
       return this
     }
     if (this._leftLayer) {
-      this._leftLayer.getContainer().style.clip = ""
+      this._leftLayer.getContainer().style.clip = ''
     }
     if (this._rightLayer) {
-      this._rightLayer.getContainer().style.clip = ""
+      this._rightLayer.getContainer().style.clip = ''
     }
     this._removeEvents()
     L.DomUtil.remove(this._container)
 
 }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
 },{"./layout.css":2,"./range.css":4}],2:[function(require,module,exports){
-var css = ".leaflet-sbs-range {\r\n    position: absolute;\r\n    top: 50%;\r\n    width: 100%;\r\n    z-index: 999;\r\n}\r\n.leaflet-sbs-divider {\r\n    position: absolute;\r\n    top: 0;\r\n    bottom: 0;\r\n    left: 50%;\r\n    margin-left: -2px;\r\n    width: 4px;\r\n    background-color: #fff;\r\n    pointer-events: none;\r\n    z-index: 999;\r\n}\r\n"; (require("./node_modules\\cssify"))(css, undefined, 'c:\Dev\leaflet-side-by-side\layout.css'); module.exports = css;
-},{"./node_modules\\cssify":3}],3:[function(require,module,exports){
-function injectStyleTag(document, fileName, cb) {
-  var style = document.getElementById(fileName);
+var inject = require('./node_modules/cssify');
+var css = ".leaflet-sbs-range {\r\n    position: absolute;\r\n    top: 50%;\r\n    width: 100%;\r\n    z-index: 999;\r\n}\r\n.leaflet-sbs-divider {\r\n    position: absolute;\r\n    top: 0;\r\n    bottom: 0;\r\n    left: 50%;\r\n    margin-left: -2px;\r\n    width: 4px;\r\n    background-color: #fff;\r\n    pointer-events: none;\r\n    z-index: 999;\r\n}\r\n";
+inject(css, undefined, '_i6aomd');
+module.exports = css;
+
+},{"./node_modules/cssify":3}],3:[function(require,module,exports){
+'use strict'
+
+function injectStyleTag (document, fileName, cb) {
+  var style = document.getElementById(fileName)
 
   if (style) {
-    cb(style);
+    cb(style)
   } else {
-    var head = document.getElementsByTagName('head')[0];
+    var head = document.getElementsByTagName('head')[0]
 
-    style = document.createElement('style');
-    style.id = fileName;
-    cb(style);
-    head.appendChild(style);
+    style = document.createElement('style')
+    if (fileName != null) style.id = fileName
+    cb(style)
+    head.appendChild(style)
   }
 
-  return style;
+  return style
 }
 
 module.exports = function (css, customDocument, fileName) {
-  var doc = customDocument || document;
+  var doc = customDocument || document
+  /* istanbul ignore if: not supported by Electron */
   if (doc.createStyleSheet) {
     var sheet = doc.createStyleSheet()
-    sheet.cssText = css;
-    return sheet.ownerNode;
+    sheet.cssText = css
+    return sheet.ownerNode
   } else {
-    return injectStyleTag(doc, fileName, function(style) {
+    return injectStyleTag(doc, fileName, function (style) {
+      /* istanbul ignore if: not supported by Electron */
       if (style.styleSheet) {
-        style.styleSheet.cssText = css;
+        style.styleSheet.cssText = css
       } else {
-        style.innerHTML = css;
+        style.innerHTML = css
       }
-    });
+    })
   }
-};
+}
 
-module.exports.byUrl = function(url) {
+module.exports.byUrl = function (url) {
+  /* istanbul ignore if: not supported by Electron */
   if (document.createStyleSheet) {
-    return document.createStyleSheet(url).ownerNode;
+    return document.createStyleSheet(url).ownerNode
   } else {
-    var head = document.getElementsByTagName('head')[0],
-        link = document.createElement('link');
+    var head = document.getElementsByTagName('head')[0]
+    var link = document.createElement('link')
 
-    link.rel = 'stylesheet';
-    link.href = url;
+    link.rel = 'stylesheet'
+    link.href = url
 
-    head.appendChild(link);
-    return link;
+    head.appendChild(link)
+    return link
   }
-};
+}
 
 },{}],4:[function(require,module,exports){
-var css = ".leaflet-sbs-range {\r\n    -webkit-appearance: none;\r\n    display: inline-block!important;\r\n    vertical-align: middle;\r\n    height: 0;\r\n    padding: 0;\r\n    margin: 0;\r\n    border: 0;\r\n    background: rgba(0, 0, 0, 0.25);\r\n    min-width: 100px;\r\n    cursor: pointer;\r\n    pointer-events: none;\r\n    z-index: 999;\r\n}\r\n.leaflet-sbs-range::-ms-fill-upper {\r\n    background: transparent;\r\n}\r\n.leaflet-sbs-range::-ms-fill-lower {\r\n    background: rgba(255, 255, 255, 0.25);\r\n}\r\n/* Browser thingies */\r\n\r\n.leaflet-sbs-range::-moz-range-track {\r\n    opacity: 0;\r\n}\r\n.leaflet-sbs-range::-ms-track {\r\n    opacity: 0;\r\n}\r\n.leaflet-sbs-range::-ms-tooltip {\r\n    display: none;\r\n}\r\n/* For whatever reason, these need to be defined\r\n * on their own so dont group them */\r\n\r\n.leaflet-sbs-range::-webkit-slider-thumb {\r\n    -webkit-appearance: none;\r\n    margin: 0;\r\n    padding: 0;\r\n    background: #fff;\r\n    height: 40px;\r\n    width: 40px;\r\n    border-radius: 20px;\r\n    cursor: ew-resize;\r\n    pointer-events: auto;\r\n    border: 1px solid #ddd;\r\n    background-image: url(\"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFAAAABQCAMAAAC5zwKfAAAABlBMVEV9fX3///+Kct39AAAAAnRSTlP/AOW3MEoAAAA9SURBVFjD7dehDQAwDANBZ/+l2wmKoiqR7pHRcaeaCxAIBAL/g7k9JxAIBAKBQCAQCAQC14H+MhAIBE4CD3fOFvGVBzhZAAAAAElFTkSuQmCC\");\r\n    background-position: 50% 50%;\r\n    background-repeat: no-repeat;\r\n    background-size: 40px 40px;\r\n}\r\n.leaflet-sbs-range::-ms-thumb {\r\n    margin: 0;\r\n    padding: 0;\r\n    background: #fff;\r\n    height: 40px;\r\n    width: 40px;\r\n    border-radius: 20px;\r\n    cursor: ew-resize;\r\n    pointer-events: auto;\r\n    border: 1px solid #ddd;\r\n    background-image: url(\"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFAAAABQCAMAAAC5zwKfAAAABlBMVEV9fX3///+Kct39AAAAAnRSTlP/AOW3MEoAAAA9SURBVFjD7dehDQAwDANBZ/+l2wmKoiqR7pHRcaeaCxAIBAL/g7k9JxAIBAKBQCAQCAQC14H+MhAIBE4CD3fOFvGVBzhZAAAAAElFTkSuQmCC\");\r\n    background-position: 50% 50%;\r\n    background-repeat: no-repeat;\r\n    background-size: 40px 40px;\r\n}\r\n.leaflet-sbs-range::-moz-range-thumb {\r\n    padding: 0;\r\n    right: 0    ;\r\n    background: #fff;\r\n    height: 40px;\r\n    width: 40px;\r\n    border-radius: 20px;\r\n    cursor: ew-resize;\r\n    pointer-events: auto;\r\n    border: 1px solid #ddd;\r\n    background-image: url(\"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFAAAABQCAMAAAC5zwKfAAAABlBMVEV9fX3///+Kct39AAAAAnRSTlP/AOW3MEoAAAA9SURBVFjD7dehDQAwDANBZ/+l2wmKoiqR7pHRcaeaCxAIBAL/g7k9JxAIBAKBQCAQCAQC14H+MhAIBE4CD3fOFvGVBzhZAAAAAElFTkSuQmCC\");\r\n    background-position: 50% 50%;\r\n    background-repeat: no-repeat;\r\n    background-size: 40px 40px;\r\n}\r\n.leaflet-sbs-range:disabled::-moz-range-thumb {\r\n    cursor: default;\r\n}\r\n.leaflet-sbs-range:disabled::-ms-thumb {\r\n    cursor: default;\r\n}\r\n.leaflet-sbs-range:disabled::-webkit-slider-thumb {\r\n    cursor: default;\r\n}\r\n.leaflet-sbs-range:disabled {\r\n    cursor: default;\r\n}\r\n.leaflet-sbs-range:focus {\r\n    outline: none!important;\r\n}\r\n.leaflet-sbs-range::-moz-focus-outer {\r\n    border: 0;\r\n}\r\n\r\n"; (require("./node_modules\\cssify"))(css, undefined, 'c:\Dev\leaflet-side-by-side\range.css'); module.exports = css;
-},{"./node_modules\\cssify":3}]},{},[1]);
+var inject = require('./node_modules/cssify');
+var css = ".leaflet-sbs-range {\r\n    -webkit-appearance: none;\r\n    display: inline-block!important;\r\n    vertical-align: middle;\r\n    height: 0;\r\n    padding: 0;\r\n    margin: 0;\r\n    border: 0;\r\n    background: rgba(0, 0, 0, 0.25);\r\n    min-width: 100px;\r\n    cursor: pointer;\r\n    pointer-events: none;\r\n    z-index: 999;\r\n}\r\n.leaflet-sbs-range::-ms-fill-upper {\r\n    background: transparent;\r\n}\r\n.leaflet-sbs-range::-ms-fill-lower {\r\n    background: rgba(255, 255, 255, 0.25);\r\n}\r\n/* Browser thingies */\r\n\r\n.leaflet-sbs-range::-moz-range-track {\r\n    opacity: 0;\r\n}\r\n.leaflet-sbs-range::-ms-track {\r\n    opacity: 0;\r\n}\r\n.leaflet-sbs-range::-ms-tooltip {\r\n    display: none;\r\n}\r\n/* For whatever reason, these need to be defined\r\n * on their own so dont group them */\r\n\r\n.leaflet-sbs-range::-webkit-slider-thumb {\r\n    -webkit-appearance: none;\r\n    margin: 0;\r\n    padding: 0;\r\n    background: #fff;\r\n    height: 40px;\r\n    width: 40px;\r\n    border-radius: 20px;\r\n    cursor: ew-resize;\r\n    pointer-events: auto;\r\n    border: 1px solid #ddd;\r\n    background-image: url(\"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFAAAABQCAMAAAC5zwKfAAAABlBMVEV9fX3///+Kct39AAAAAnRSTlP/AOW3MEoAAAA9SURBVFjD7dehDQAwDANBZ/+l2wmKoiqR7pHRcaeaCxAIBAL/g7k9JxAIBAKBQCAQCAQC14H+MhAIBE4CD3fOFvGVBzhZAAAAAElFTkSuQmCC\");\r\n    background-position: 50% 50%;\r\n    background-repeat: no-repeat;\r\n    background-size: 40px 40px;\r\n}\r\n.leaflet-sbs-range::-ms-thumb {\r\n    margin: 0;\r\n    padding: 0;\r\n    background: #fff;\r\n    height: 40px;\r\n    width: 40px;\r\n    border-radius: 20px;\r\n    cursor: ew-resize;\r\n    pointer-events: auto;\r\n    border: 1px solid #ddd;\r\n    background-image: url(\"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFAAAABQCAMAAAC5zwKfAAAABlBMVEV9fX3///+Kct39AAAAAnRSTlP/AOW3MEoAAAA9SURBVFjD7dehDQAwDANBZ/+l2wmKoiqR7pHRcaeaCxAIBAL/g7k9JxAIBAKBQCAQCAQC14H+MhAIBE4CD3fOFvGVBzhZAAAAAElFTkSuQmCC\");\r\n    background-position: 50% 50%;\r\n    background-repeat: no-repeat;\r\n    background-size: 40px 40px;\r\n}\r\n.leaflet-sbs-range::-moz-range-thumb {\r\n    padding: 0;\r\n    right: 0    ;\r\n    background: #fff;\r\n    height: 40px;\r\n    width: 40px;\r\n    border-radius: 20px;\r\n    cursor: ew-resize;\r\n    pointer-events: auto;\r\n    border: 1px solid #ddd;\r\n    background-image: url(\"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFAAAABQCAMAAAC5zwKfAAAABlBMVEV9fX3///+Kct39AAAAAnRSTlP/AOW3MEoAAAA9SURBVFjD7dehDQAwDANBZ/+l2wmKoiqR7pHRcaeaCxAIBAL/g7k9JxAIBAKBQCAQCAQC14H+MhAIBE4CD3fOFvGVBzhZAAAAAElFTkSuQmCC\");\r\n    background-position: 50% 50%;\r\n    background-repeat: no-repeat;\r\n    background-size: 40px 40px;\r\n}\r\n.leaflet-sbs-range:disabled::-moz-range-thumb {\r\n    cursor: default;\r\n}\r\n.leaflet-sbs-range:disabled::-ms-thumb {\r\n    cursor: default;\r\n}\r\n.leaflet-sbs-range:disabled::-webkit-slider-thumb {\r\n    cursor: default;\r\n}\r\n.leaflet-sbs-range:disabled {\r\n    cursor: default;\r\n}\r\n.leaflet-sbs-range:focus {\r\n    outline: none!important;\r\n}\r\n.leaflet-sbs-range::-moz-focus-outer {\r\n    border: 0;\r\n}\r\n\r\n";
+inject(css, undefined, '_1tlt668');
+module.exports = css;
+
+},{"./node_modules/cssify":3}]},{},[1]);

package.json

   "author": "Gregor MacLennan / Digital Democracy",
   "license": "MIT",
   "devDependencies": {
-    "browserify": "^12.0.1",
-    "budo": "^7.0.0",
-    "standard": "^5.4.1",
-    "uglify-js": "^2.6.1"
+    "browserify": "^16.2.2",
+    "budo": "^11.2.0",
+    "standard": "^11.0.1",
+    "uglify-js": "^3.3.24"
   },
   "dependencies": {
-    "browserify-shim": "^3.8.11",
+    "browserify-shim": "^3.8.14",
     "css-img-datauri-stream": "^0.1.5",
-    "cssify": "^0.8.0",
+    "cssify": "^1.0.3",
     "leaflet": ">=0.7.7 <2.0.0"
   },
   "repository": {