diff --git a/.gitignore b/.gitignore
index ff7dfd2..7badfec 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 .idea
 *.iml
 node_modules
+.vs
diff --git a/.jshintrc b/.jshintrc
deleted file mode 100755
index 1401d64..0000000
--- a/.jshintrc
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-    "predef": [
-        "jasmine",
-        "spyOn",
-        "it",
-        "console",
-        "describe",
-        "expect",
-        "beforeEach",
-        "waits",
-        "waitsFor",
-        "runs"
-    ],
-
-    "node" : true,
-    "browser" : true,
-
-    "boss" : false,
-    "curly": false,
-    "debug": false,
-    "devel": false,
-    "eqeqeq": true,
-    "evil": true,
-    "forin": false,
-    "immed": true,
-    "laxbreak": false,
-    "newcap": true,
-    "noarg": true,
-    "noempty": false,
-    "nonew": false,
-    "nomen": false,
-    "onevar": true,
-    "plusplus": false,
-    "regexp": false,
-    "undef": true,
-    "sub": true,
-    "strict": false,
-    "white": true
-}
diff --git a/Gruntfile.js b/Gruntfile.js
deleted file mode 100755
index 33f18b3..0000000
--- a/Gruntfile.js
+++ /dev/null
@@ -1,40 +0,0 @@
-'use strict';
-
-module.exports = function(grunt) {
-
-    grunt.initConfig({
-        ghPagesDir: '../Leaflet.MultiOptionsPolyline@gh-pages/',
-        pkg: grunt.file.readJSON('package.json'),
-        uglify: {
-            options: {
-                banner: '/*! <%= pkg.name + " v" + pkg.version %> <%= grunt.template.today("dd-mm-yyyy") %> */\n'
-            },
-            dist: {
-                files: {
-                    '<%= pkg.name %>.min.js': ['<%= pkg.name %>.js']
-                }
-            }
-        },
-        jshint: {
-            files: ['Leaflet.MultiOptionsPolyline.js', 'demo/js/*.js'],
-            options: {
-            }
-        },
-        copy: {
-            "gh-pages": {
-                files: [
-                    {expand: true, src: ['demo/**'], dest: '<%= ghPagesDir %>'},
-                    {expand: true, src: ['Leaflet.MultiOptionsPolyline.js'], dest: '<%= ghPagesDir %>'}
-                ]
-            }
-        }
-
-    });
-
-    grunt.loadNpmTasks('grunt-contrib-uglify');
-    grunt.loadNpmTasks('grunt-contrib-jshint');
-    grunt.loadNpmTasks('grunt-contrib-copy');
-
-    grunt.registerTask('default', ['jshint', 'uglify']);
-
-};
\ No newline at end of file
diff --git a/Leaflet.MultiOptionsPolyline.js b/Leaflet.MultiOptionsPolyline.js
deleted file mode 100644
index 01f3644..0000000
--- a/Leaflet.MultiOptionsPolyline.js
+++ /dev/null
@@ -1,114 +0,0 @@
-(function (root, factory) {
-    if (typeof define === "function" && define.amd) {
-        define(["leaflet"], factory);
-    } else if (typeof module === "object" && module.exports) {
-        factory(require("leaflet"));
-    } else {
-        factory(root.L);
-    }
-} (this, function (L) {
-    "use strict";
-
-/*
- * L.MultiOptionsPolyline is a MultiPolyLine which parts can be styled differently.
- * options: {
- *     multiOptions: {
- *         optionIdxFn: function (latLng, prevLatLng, index, allLatlngs),
- *         fnContext: ctx, // the context to call optionIdxFn (optional)
- *         options: [{}, {}, {}] or function, // options for the index returned by optionIdxFn. If supplied with a function then it will be called with the index
- *         copyBaseOptions: true
- *     },
- *     // other options from Polyline
- * }
- */
-var MultiOptionsPolyline = L.FeatureGroup.extend({
-
-    initialize: function (latlngs, options) {
-        var copyBaseOptions = options.multiOptions.copyBaseOptions;
-
-        this._layers = {};
-        this._options = options;
-        if (copyBaseOptions === undefined || copyBaseOptions) {
-            this._copyBaseOptions();
-        }
-
-        this.setLatLngs(latlngs);
-    },
-
-    _copyBaseOptions: function () {
-        var multiOptions = this._options.multiOptions,
-            baseOptions,
-            optionsArray = multiOptions.options,
-            i, len = optionsArray.length;
-
-        baseOptions = L.extend({}, this._options);
-        delete baseOptions.multiOptions;
-
-        for (i = 0; i < len; ++i) {
-            optionsArray[i] = L.extend({}, baseOptions, optionsArray[i]);
-        }
-    },
-
-    setLatLngs: function (latlngs) {
-        var i, len = latlngs.length,
-            multiOptions = this._options.multiOptions,
-            optionIdxFn = multiOptions.optionIdxFn,
-            fnContext = multiOptions.fnContext || this,
-            prevOptionIdx, optionIdx,
-            segmentLatlngs;
-
-        this._originalLatlngs = latlngs;
-
-        this.eachLayer(function (layer) {
-            this.removeLayer(layer);
-        }, this);
-
-        for (i = 1; i < len; ++i) {
-            optionIdx = optionIdxFn.call(
-                fnContext, latlngs[i], latlngs[i - 1], i, latlngs);
-
-            if (i === 1) {
-                segmentLatlngs = [latlngs[0]];
-                prevOptionIdx = optionIdxFn.call(fnContext, latlngs[0], latlngs[0], 0, latlngs);
-            }
-
-            segmentLatlngs.push(latlngs[i]);
-
-            // is there a change in options or is it the last point?
-            if (prevOptionIdx !== optionIdx || i === len - 1) {
-                // Check if options is a function or an array
-                if (typeof multiOptions.options === "function") {
-                    this.addLayer(L.polyline(segmentLatlngs, multiOptions.options(prevOptionIdx)));
-                } else {
-                    this.addLayer(L.polyline(segmentLatlngs, multiOptions.options[prevOptionIdx]));
-                }
-
-                prevOptionIdx = optionIdx;
-                segmentLatlngs = [latlngs[i]];
-            }
-        }
-
-        return this;
-    },
-
-    getLatLngs: function () {
-        return this._originalLatlngs;
-    },
-
-    getLatLngsSegments: function () {
-        var latlngs = [];
-
-        this.eachLayer(function (layer) {
-            latlngs.push(layer.getLatLngs());
-        });
-
-        return latlngs;
-    }
-});
-
-L.MultiOptionsPolyline = MultiOptionsPolyline;
-L.multiOptionsPolyline = function (latlngs, options) {
-    return new MultiOptionsPolyline(latlngs, options);
-};
-
-}));
diff --git a/Leaflet.MultiOptionsPolyline.min.js b/Leaflet.MultiOptionsPolyline.min.js
deleted file mode 100644
index cfc727a..0000000
--- a/Leaflet.MultiOptionsPolyline.min.js
+++ /dev/null
@@ -1,2 +0,0 @@
-/*! Leaflet.MultiOptionsPolyline v1.0.0 26-11-2016 */
-!function(a,b){"function"==typeof define&&define.amd?define(["leaflet"],b):b("object"==typeof module&&module.exports?require("leaflet"):a.L)}(this,function(a){"use strict";var b=a.FeatureGroup.extend({initialize:function(a,b){var c=b.multiOptions.copyBaseOptions;this._layers={},this._options=b,(void 0===c||c)&&this._copyBaseOptions(),this.setLatLngs(a)},_copyBaseOptions:function(){var b,c,d=this._options.multiOptions,e=d.options,f=e.length;for(b=a.extend({},this._options),delete b.multiOptions,c=0;c<f;++c)e[c]=a.extend({},b,e[c])},setLatLngs:function(b){var c,d,e,f,g=b.length,h=this._options.multiOptions,i=h.optionIdxFn,j=h.fnContext||this;for(this._originalLatlngs=b,this.eachLayer(function(a){this.removeLayer(a)},this),c=1;c<g;++c)e=i.call(j,b[c],b[c-1],c,b),1===c&&(f=[b[0]],d=i.call(j,b[0],b[0],0,b)),f.push(b[c]),d===e&&c!==g-1||("function"==typeof h.options?this.addLayer(a.polyline(f,h.options(d))):this.addLayer(a.polyline(f,h.options[d])),d=e,f=[b[c]]);return this},getLatLngs:function(){return this._originalLatlngs},getLatLngsSegments:function(){var a=[];return this.eachLayer(function(b){a.push(b.getLatLngs())}),a}});a.MultiOptionsPolyline=b,a.multiOptionsPolyline=function(a,c){return new b(a,c)}});
\ No newline at end of file
diff --git a/README.md b/README.md
index 2a9734b..9659564 100755
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ Have a look at the demo. Links to source code are included.
 # Example
 
 ```js
-L.multiOptionsPolyline(points, {
+new MultiOptionsPolyline(points, {
     multiOptions: {
         optionIdxFn: function (latLng) {
             var i,
@@ -42,6 +42,10 @@ L.multiOptionsPolyline(points, {
 
     $ bower install hgoebl/Leaflet.MultiOptionsPolyline --save
 
+## NPM
+
+    npm install Leaflet.MultiOptionsPolyline --save
+
 # License
 
 MIT-License (see LICENSE file).
diff --git a/demo/index.html b/demo/index.html
index 243e0f1..02d0b24 100644
--- a/demo/index.html
+++ b/demo/index.html
@@ -3,9 +3,8 @@
 <head>
     <meta charset="UTF-8">
     <title>Leaflet.MultiOptionsPolyline Demo</title>
-    <link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css">
-    <link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap-theme.min.css">
-    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.0.1/leaflet.css" />
+    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.css" integrity="sha384-/Y6pD6FV/Vv2HJnA6t+vslU6fwYXjCFtcEpHbNJ0lyAFsXTsjBbfaDjzALeQsN6M" crossorigin="anonymous">
+    <link rel="stylesheet" href="https://unpkg.com/leaflet@1.2.0/dist/leaflet.css" />
     <style>
         @media (min-width: 768px) {
             .map {
@@ -124,10 +123,10 @@ <h2>Speed</h2>
     </div>
 </div>
 
-<script src="https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.0.1/leaflet.js"></script>
+<script src="https://unpkg.com/leaflet@1.0.0/dist/leaflet.js"></script>
 <script src="https://www.mapquestapi.com/sdk/leaflet/v2.2/mq-map.js?key=6kOLUi04ZadauhzPhyAe9yG2rc6kIMmQ"></script>
-<script src="../Leaflet.MultiOptionsPolyline.js"></script>
-<script src="lib/zepto.min.js"></script>
+<script src="js/MultiOptionsPolyline.js"></script>
+<script src="js/zepto.min.js"></script>
 <script src="js/demo.js"></script>
 </body>
-</html>
+</html>
\ No newline at end of file
diff --git a/demo/js/MultiOptionsPolyline.js b/demo/js/MultiOptionsPolyline.js
new file mode 100644
index 0000000..f61c015
--- /dev/null
+++ b/demo/js/MultiOptionsPolyline.js
@@ -0,0 +1,83 @@
+var MultiOptionsPolyline = (function (leaflet) {
+'use strict';
+
+function __extends(d, b) {
+    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
+    function __() { this.constructor = d; }
+    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+}
+
+var MultiOptionsPolyline = /** @class */ (function (_super) {
+    __extends(MultiOptionsPolyline, _super);
+    function MultiOptionsPolyline(latlngs, options) {
+        var _this = _super.call(this) || this;
+        _this._options = options;
+        _this._originalLatlngs = latlngs;
+        //let copyBaseOptions = this._options.multiOptions.copyBaseOptions;
+        _this._layers = {};
+        /*if (copyBaseOptions) {
+            this.copyBaseOptions();
+        }*/
+        _this.setLatLngs(_this._originalLatlngs);
+        return _this;
+    }
+    /*
+    private copyBaseOptions ():void {
+        let multiOptions = this._options.multiOptions;
+        let optionsArray = multiOptions.options;
+        let len = optionsArray.length;
+
+        let baseOptions = Util.extend({}, this._options);
+        delete baseOptions.multiOptions;
+
+        for (let i = 0; i < len; ++i) {
+            optionsArray[i] = Util.extend(baseOptions, multiOptions.options[i]);
+        }
+    }
+    */
+    MultiOptionsPolyline.prototype.setLatLngs = function (latlngs) {
+        var _this = this;
+        var multiOptions = this._options.multiOptions, optionIdxFn = multiOptions.optionIdxFn, fnContext = multiOptions.fnContext || this, prevOptionIdx, optionIdx, segmentLatlngs;
+        this.eachLayer(function (layer) {
+            _this.removeLayer(layer);
+        }, this);
+        var len = latlngs.length;
+        for (var i = 1; i < len; ++i) {
+            optionIdx = optionIdxFn.call(fnContext, latlngs[i], latlngs[i - 1], i, latlngs);
+            if (i === 1) {
+                segmentLatlngs = [latlngs[0]];
+                prevOptionIdx = optionIdxFn.call(fnContext, latlngs[0], latlngs[0], 0, latlngs);
+            }
+            segmentLatlngs.push(latlngs[i]);
+            // is there a change in options or is it the last point?
+            if (prevOptionIdx !== optionIdx || i === len - 1) {
+                // Check if options is a function or an array
+                if (typeof multiOptions.options === "function") {
+                    this.addLayer(new leaflet.Polyline(segmentLatlngs, multiOptions.options(prevOptionIdx)));
+                }
+                else {
+                    this.addLayer(new leaflet.Polyline(segmentLatlngs, multiOptions.options[prevOptionIdx]));
+                }
+                prevOptionIdx = optionIdx;
+                segmentLatlngs = [latlngs[i]];
+            }
+        }
+    };
+    MultiOptionsPolyline.prototype.getLatLngs = function () {
+        return this._originalLatlngs;
+    };
+    MultiOptionsPolyline.prototype.getLatLngsSegments = function () {
+        var latlngs = [];
+        this.eachLayer(function (layer) {
+            if (layer instanceof leaflet.Polyline) {
+                latlngs.push(layer.getLatLngs());
+            }
+        });
+        return latlngs;
+    };
+    return MultiOptionsPolyline;
+}(leaflet.FeatureGroup));
+
+return MultiOptionsPolyline;
+
+}(L));
diff --git a/demo/js/MultiOptionsPolyline.umd.js b/demo/js/MultiOptionsPolyline.umd.js
new file mode 100644
index 0000000..c47dd8f
--- /dev/null
+++ b/demo/js/MultiOptionsPolyline.umd.js
@@ -0,0 +1,86 @@
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory(require('leaflet')) :
+	typeof define === 'function' && define.amd ? define(['leaflet'], factory) :
+	(global.MultiOptionsPolyline = factory(global.L));
+}(this, (function (leaflet) { 'use strict';
+
+function __extends(d, b) {
+    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
+    function __() { this.constructor = d; }
+    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+}
+
+var MultiOptionsPolyline = /** @class */ (function (_super) {
+    __extends(MultiOptionsPolyline, _super);
+    function MultiOptionsPolyline(latlngs, options) {
+        var _this = _super.call(this) || this;
+        _this._options = options;
+        _this._originalLatlngs = latlngs;
+        //let copyBaseOptions = this._options.multiOptions.copyBaseOptions;
+        _this._layers = {};
+        /*if (copyBaseOptions) {
+            this.copyBaseOptions();
+        }*/
+        _this.setLatLngs(_this._originalLatlngs);
+        return _this;
+    }
+    /*
+    private copyBaseOptions ():void {
+        let multiOptions = this._options.multiOptions;
+        let optionsArray = multiOptions.options;
+        let len = optionsArray.length;
+
+        let baseOptions = Util.extend({}, this._options);
+        delete baseOptions.multiOptions;
+
+        for (let i = 0; i < len; ++i) {
+            optionsArray[i] = Util.extend(baseOptions, multiOptions.options[i]);
+        }
+    }
+    */
+    MultiOptionsPolyline.prototype.setLatLngs = function (latlngs) {
+        var _this = this;
+        var multiOptions = this._options.multiOptions, optionIdxFn = multiOptions.optionIdxFn, fnContext = multiOptions.fnContext || this, prevOptionIdx, optionIdx, segmentLatlngs;
+        this.eachLayer(function (layer) {
+            _this.removeLayer(layer);
+        }, this);
+        var len = latlngs.length;
+        for (var i = 1; i < len; ++i) {
+            optionIdx = optionIdxFn.call(fnContext, latlngs[i], latlngs[i - 1], i, latlngs);
+            if (i === 1) {
+                segmentLatlngs = [latlngs[0]];
+                prevOptionIdx = optionIdxFn.call(fnContext, latlngs[0], latlngs[0], 0, latlngs);
+            }
+            segmentLatlngs.push(latlngs[i]);
+            // is there a change in options or is it the last point?
+            if (prevOptionIdx !== optionIdx || i === len - 1) {
+                // Check if options is a function or an array
+                if (typeof multiOptions.options === "function") {
+                    this.addLayer(new leaflet.Polyline(segmentLatlngs, multiOptions.options(prevOptionIdx)));
+                }
+                else {
+                    this.addLayer(new leaflet.Polyline(segmentLatlngs, multiOptions.options[prevOptionIdx]));
+                }
+                prevOptionIdx = optionIdx;
+                segmentLatlngs = [latlngs[i]];
+            }
+        }
+    };
+    MultiOptionsPolyline.prototype.getLatLngs = function () {
+        return this._originalLatlngs;
+    };
+    MultiOptionsPolyline.prototype.getLatLngsSegments = function () {
+        var latlngs = [];
+        this.eachLayer(function (layer) {
+            if (layer instanceof leaflet.Polyline) {
+                latlngs.push(layer.getLatLngs());
+            }
+        });
+        return latlngs;
+    };
+    return MultiOptionsPolyline;
+}(leaflet.FeatureGroup));
+
+return MultiOptionsPolyline;
+
+})));
diff --git a/demo/js/demo.js b/demo/js/demo.js
index c728e98..a495033 100644
--- a/demo/js/demo.js
+++ b/demo/js/demo.js
@@ -222,7 +222,7 @@
             me.visibleTrack = L.featureGroup();
 
             // create a polyline from an arrays of LatLng points
-            var polyline = L.multiOptionsPolyline(points, {
+            var polyline = new MultiOptionsPolyline(points, {
                 multiOptions: me._multiOptions[me.selected],
                 weight: 5,
                 lineCap: 'butt',
@@ -242,4 +242,4 @@
     new Demo('map4', 'triZebra').loadData('hallenbad');
     new Demo('map5', 'speed').loadData('hallenbad');
 
-})(Zepto);
+})(Zepto);
\ No newline at end of file
diff --git a/demo/lib/zepto.min.js b/demo/js/zepto.min.js
similarity index 99%
rename from demo/lib/zepto.min.js
rename to demo/js/zepto.min.js
index 0b2f97a..5c8a200 100644
--- a/demo/lib/zepto.min.js
+++ b/demo/js/zepto.min.js
@@ -1,2 +1,2 @@
 /* Zepto v1.1.3 - zepto event ajax form ie - zeptojs.com/license */
-var Zepto=function(){function L(t){return null==t?String(t):j[T.call(t)]||"object"}function Z(t){return"function"==L(t)}function $(t){return null!=t&&t==t.window}function _(t){return null!=t&&t.nodeType==t.DOCUMENT_NODE}function D(t){return"object"==L(t)}function R(t){return D(t)&&!$(t)&&Object.getPrototypeOf(t)==Object.prototype}function M(t){return"number"==typeof t.length}function k(t){return s.call(t,function(t){return null!=t})}function z(t){return t.length>0?n.fn.concat.apply([],t):t}function F(t){return t.replace(/::/g,"/").replace(/([A-Z]+)([A-Z][a-z])/g,"$1_$2").replace(/([a-z\d])([A-Z])/g,"$1_$2").replace(/_/g,"-").toLowerCase()}function q(t){return t in f?f[t]:f[t]=new RegExp("(^|\\s)"+t+"(\\s|$)")}function H(t,e){return"number"!=typeof e||c[F(t)]?e:e+"px"}function I(t){var e,n;return u[t]||(e=a.createElement(t),a.body.appendChild(e),n=getComputedStyle(e,"").getPropertyValue("display"),e.parentNode.removeChild(e),"none"==n&&(n="block"),u[t]=n),u[t]}function 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diff --git a/dist/MultiOptionsPolyline.js b/dist/MultiOptionsPolyline.js
new file mode 100644
index 0000000..f61c015
--- /dev/null
+++ b/dist/MultiOptionsPolyline.js
@@ -0,0 +1,83 @@
+var MultiOptionsPolyline = (function (leaflet) {
+'use strict';
+
+function __extends(d, b) {
+    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
+    function __() { this.constructor = d; }
+    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+}
+
+var MultiOptionsPolyline = /** @class */ (function (_super) {
+    __extends(MultiOptionsPolyline, _super);
+    function MultiOptionsPolyline(latlngs, options) {
+        var _this = _super.call(this) || this;
+        _this._options = options;
+        _this._originalLatlngs = latlngs;
+        //let copyBaseOptions = this._options.multiOptions.copyBaseOptions;
+        _this._layers = {};
+        /*if (copyBaseOptions) {
+            this.copyBaseOptions();
+        }*/
+        _this.setLatLngs(_this._originalLatlngs);
+        return _this;
+    }
+    /*
+    private copyBaseOptions ():void {
+        let multiOptions = this._options.multiOptions;
+        let optionsArray = multiOptions.options;
+        let len = optionsArray.length;
+
+        let baseOptions = Util.extend({}, this._options);
+        delete baseOptions.multiOptions;
+
+        for (let i = 0; i < len; ++i) {
+            optionsArray[i] = Util.extend(baseOptions, multiOptions.options[i]);
+        }
+    }
+    */
+    MultiOptionsPolyline.prototype.setLatLngs = function (latlngs) {
+        var _this = this;
+        var multiOptions = this._options.multiOptions, optionIdxFn = multiOptions.optionIdxFn, fnContext = multiOptions.fnContext || this, prevOptionIdx, optionIdx, segmentLatlngs;
+        this.eachLayer(function (layer) {
+            _this.removeLayer(layer);
+        }, this);
+        var len = latlngs.length;
+        for (var i = 1; i < len; ++i) {
+            optionIdx = optionIdxFn.call(fnContext, latlngs[i], latlngs[i - 1], i, latlngs);
+            if (i === 1) {
+                segmentLatlngs = [latlngs[0]];
+                prevOptionIdx = optionIdxFn.call(fnContext, latlngs[0], latlngs[0], 0, latlngs);
+            }
+            segmentLatlngs.push(latlngs[i]);
+            // is there a change in options or is it the last point?
+            if (prevOptionIdx !== optionIdx || i === len - 1) {
+                // Check if options is a function or an array
+                if (typeof multiOptions.options === "function") {
+                    this.addLayer(new leaflet.Polyline(segmentLatlngs, multiOptions.options(prevOptionIdx)));
+                }
+                else {
+                    this.addLayer(new leaflet.Polyline(segmentLatlngs, multiOptions.options[prevOptionIdx]));
+                }
+                prevOptionIdx = optionIdx;
+                segmentLatlngs = [latlngs[i]];
+            }
+        }
+    };
+    MultiOptionsPolyline.prototype.getLatLngs = function () {
+        return this._originalLatlngs;
+    };
+    MultiOptionsPolyline.prototype.getLatLngsSegments = function () {
+        var latlngs = [];
+        this.eachLayer(function (layer) {
+            if (layer instanceof leaflet.Polyline) {
+                latlngs.push(layer.getLatLngs());
+            }
+        });
+        return latlngs;
+    };
+    return MultiOptionsPolyline;
+}(leaflet.FeatureGroup));
+
+return MultiOptionsPolyline;
+
+}(L));
diff --git a/dist/MultiOptionsPolyline.umd.js b/dist/MultiOptionsPolyline.umd.js
new file mode 100644
index 0000000..c47dd8f
--- /dev/null
+++ b/dist/MultiOptionsPolyline.umd.js
@@ -0,0 +1,86 @@
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory(require('leaflet')) :
+	typeof define === 'function' && define.amd ? define(['leaflet'], factory) :
+	(global.MultiOptionsPolyline = factory(global.L));
+}(this, (function (leaflet) { 'use strict';
+
+function __extends(d, b) {
+    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
+    function __() { this.constructor = d; }
+    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+}
+
+var MultiOptionsPolyline = /** @class */ (function (_super) {
+    __extends(MultiOptionsPolyline, _super);
+    function MultiOptionsPolyline(latlngs, options) {
+        var _this = _super.call(this) || this;
+        _this._options = options;
+        _this._originalLatlngs = latlngs;
+        //let copyBaseOptions = this._options.multiOptions.copyBaseOptions;
+        _this._layers = {};
+        /*if (copyBaseOptions) {
+            this.copyBaseOptions();
+        }*/
+        _this.setLatLngs(_this._originalLatlngs);
+        return _this;
+    }
+    /*
+    private copyBaseOptions ():void {
+        let multiOptions = this._options.multiOptions;
+        let optionsArray = multiOptions.options;
+        let len = optionsArray.length;
+
+        let baseOptions = Util.extend({}, this._options);
+        delete baseOptions.multiOptions;
+
+        for (let i = 0; i < len; ++i) {
+            optionsArray[i] = Util.extend(baseOptions, multiOptions.options[i]);
+        }
+    }
+    */
+    MultiOptionsPolyline.prototype.setLatLngs = function (latlngs) {
+        var _this = this;
+        var multiOptions = this._options.multiOptions, optionIdxFn = multiOptions.optionIdxFn, fnContext = multiOptions.fnContext || this, prevOptionIdx, optionIdx, segmentLatlngs;
+        this.eachLayer(function (layer) {
+            _this.removeLayer(layer);
+        }, this);
+        var len = latlngs.length;
+        for (var i = 1; i < len; ++i) {
+            optionIdx = optionIdxFn.call(fnContext, latlngs[i], latlngs[i - 1], i, latlngs);
+            if (i === 1) {
+                segmentLatlngs = [latlngs[0]];
+                prevOptionIdx = optionIdxFn.call(fnContext, latlngs[0], latlngs[0], 0, latlngs);
+            }
+            segmentLatlngs.push(latlngs[i]);
+            // is there a change in options or is it the last point?
+            if (prevOptionIdx !== optionIdx || i === len - 1) {
+                // Check if options is a function or an array
+                if (typeof multiOptions.options === "function") {
+                    this.addLayer(new leaflet.Polyline(segmentLatlngs, multiOptions.options(prevOptionIdx)));
+                }
+                else {
+                    this.addLayer(new leaflet.Polyline(segmentLatlngs, multiOptions.options[prevOptionIdx]));
+                }
+                prevOptionIdx = optionIdx;
+                segmentLatlngs = [latlngs[i]];
+            }
+        }
+    };
+    MultiOptionsPolyline.prototype.getLatLngs = function () {
+        return this._originalLatlngs;
+    };
+    MultiOptionsPolyline.prototype.getLatLngsSegments = function () {
+        var latlngs = [];
+        this.eachLayer(function (layer) {
+            if (layer instanceof leaflet.Polyline) {
+                latlngs.push(layer.getLatLngs());
+            }
+        });
+        return latlngs;
+    };
+    return MultiOptionsPolyline;
+}(leaflet.FeatureGroup));
+
+return MultiOptionsPolyline;
+
+})));
diff --git a/index.d.ts b/index.d.ts
deleted file mode 100644
index d55156e..0000000
--- a/index.d.ts
+++ /dev/null
@@ -1,32 +0,0 @@
-/// <reference types="leaflet" />
-
-declare namespace L {
-
-    export type PolylineOptionsFn = (optionIdx: number) => PolylineOptions;
-
-    export interface MultiOptions {
-        optionIdxFn: (latLng, prevLatLng, index, allLatlngs) => number;
-        // options for the index returned by optionIdxFn. If supplied with a function then it will be called with the index
-        options: PolylineOptions[] | PolylineOptionsFn;
-        // the context to call optionIdxFn (optional)
-        fnContext?: any;
-        copyBaseOptions?: boolean;
-    }
-
-    export interface MultiOptionsPolylineOptions extends MarkerOptions {
-        multiOptions: MultiOptions;
-    }
-
-    export interface MultiOptionsPolyline extends FeatureGroup {
-        initialize(latlng: LatLng[], options?: MultiOptionsPolylineOptions): void;
-        setLatLngs(latlngs: LatLng[]): MultiOptionsPolyline;
-        getLatLngs(): LatLng[];
-        getLatLngsSegments(): LatLng[];
-    }
-
-    export function multiOptionsPolyline(latlng: LatLng[], options?: MultiOptionsPolylineOptions): MultiOptionsPolyline;
-}
-
-declare module 'Leaflet.MultiOptionsPolyline' {
-    export = L;
-}
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..045f597
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,1842 @@
+{
+  "name": "leaflet-multi-options-polyline",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "@types/geojson": {
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+      "dev": true
+    },
+    "@types/leaflet": {
+      "version": "1.2.5",
+      "resolved": "https://registry.npmjs.org/@types/leaflet/-/leaflet-1.2.5.tgz",
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+      "dev": true,
+      "requires": {
+        "@types/geojson": "7946.0.1"
+      }
+    },
+    "anymatch": {
+      "version": "1.3.2",
+      "resolved": "https://registry.npmjs.org/anymatch/-/anymatch-1.3.2.tgz",
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+      "dev": true,
+      "requires": {
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+        "normalize-path": "2.1.1"
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+}
diff --git a/package.json b/package.json
index d965fe8..19a7d4b 100755
--- a/package.json
+++ b/package.json
@@ -1,19 +1,25 @@
 {
-  "name": "Leaflet.MultiOptionsPolyline",
+  "name": "leaflet-multi-options-polyline",
   "version": "1.0.0",
   "description": "A Leaflet plugin for multi-colored Polyline",
-  "main": "Leaflet.MultiOptionsPolyline.js",
-  "typings": "index",
+  "main": "dist/MultiOptionsPolyline.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "http-server ./demo",
+    "copy": "cpx dist/**/*.js demo/js",
+    "build": "rollup -c && npm run copy"
+  },
   "devDependencies": {
-    "@types/leaflet": "^1.0.38",
-    "grunt": "^1.0.1",
-    "grunt-contrib-clean": "^1.0.0",
-    "grunt-contrib-copy": "^1.0.0",
-    "grunt-contrib-jshint": "^1.1.0",
-    "grunt-contrib-uglify": "^2.0.0"
+    "@types/leaflet": "^1.2.0",
+    "cpx": "^1.5.0",
+    "http-server": "^0.10.0",
+    "leaflet": "^1.2.0",
+    "rollup": "^0.50.0",
+    "rollup-plugin-typescript": "^0.8.1",
+    "typescript": "^2.5.3"
   },
   "peerDependencies": {
-    "leaflet": "^1.0.0"
+    "leaflet": "^1.2.0"
   },
   "repository": {
     "type": "git",
diff --git a/rollup.config.js b/rollup.config.js
new file mode 100644
index 0000000..06d06af
--- /dev/null
+++ b/rollup.config.js
@@ -0,0 +1,25 @@
+import typescript from 'rollup-plugin-typescript';
+
+export default {
+  input: './src/MultiOptionsPolyline.ts',
+  output: [
+    {
+      file: 'dist/MultiOptionsPolyline.js',
+      format: 'iife'
+    },
+    {
+      file: 'dist/MultiOptionsPolyline.umd.js',
+      format: 'umd'
+    }
+  ],
+  name: 'MultiOptionsPolyline',
+  globals: {
+    leaflet: 'L'
+  },
+  external: [ 'leaflet' ],
+  plugins: [
+    typescript({
+        typescript: require('typescript')
+    })
+  ]
+}
\ No newline at end of file
diff --git a/src/IMultiOptionsPolylineOptions.ts b/src/IMultiOptionsPolylineOptions.ts
new file mode 100644
index 0000000..3f61f45
--- /dev/null
+++ b/src/IMultiOptionsPolylineOptions.ts
@@ -0,0 +1,18 @@
+import { LatLng, PolylineOptions } from 'leaflet';
+
+
+type PolylineOptionsFn = (optionIdx: number) => PolylineOptions;
+
+
+interface IMultiOptions {
+    optionIdxFn: (latLng: LatLng, prevLatLng: LatLng, index: number, allLatlngs: Array<LatLng>) => number;
+    // options for the index returned by optionIdxFn. If supplied with a function then it will be called with the index
+    options: Array<PolylineOptions> | PolylineOptionsFn;
+    // the context to call optionIdxFn (optional)
+    fnContext?: any;
+    //copyBaseOptions?: boolean;
+}
+
+export interface IMultiOptionsPolylineOptions extends PolylineOptions {
+    multiOptions: IMultiOptions;
+}
\ No newline at end of file
diff --git a/src/MultiOptionsPolyline.ts b/src/MultiOptionsPolyline.ts
new file mode 100644
index 0000000..c385ff9
--- /dev/null
+++ b/src/MultiOptionsPolyline.ts
@@ -0,0 +1,93 @@
+import { Polyline, FeatureGroup, Util, LatLng, PolylineOptions, MarkerOptions } from 'leaflet';
+import { IMultiOptionsPolylineOptions } from './IMultiOptionsPolylineOptions'
+
+export default class MultiOptionsPolyline extends FeatureGroup
+{
+    _layers: object;
+    _options: IMultiOptionsPolylineOptions;
+    _originalLatlngs: Array<LatLng>;
+    _inLatLngs: Array<LatLng>;
+    constructor(latlngs: Array<LatLng>, options: IMultiOptionsPolylineOptions){
+        super();
+        this._options = options;
+        this._originalLatlngs = latlngs;
+
+        //let copyBaseOptions = this._options.multiOptions.copyBaseOptions;
+        
+        this._layers = {};
+        /*if (copyBaseOptions) {
+            this.copyBaseOptions();
+        }*/
+
+        this.setLatLngs(this._originalLatlngs);
+    }
+    /*
+    private copyBaseOptions ():void {
+        let multiOptions = this._options.multiOptions;
+        let optionsArray = multiOptions.options;
+        let len = optionsArray.length;
+
+        let baseOptions = Util.extend({}, this._options);
+        delete baseOptions.multiOptions;
+
+        for (let i = 0; i < len; ++i) {
+            optionsArray[i] = Util.extend(baseOptions, multiOptions.options[i]);
+        }
+    }
+    */
+
+    setLatLngs (latlngs:Array<LatLng>):void {
+        let multiOptions = this._options.multiOptions,
+            optionIdxFn = multiOptions.optionIdxFn,
+            fnContext = multiOptions.fnContext || this,
+            prevOptionIdx, optionIdx,
+            segmentLatlngs;
+
+        this.eachLayer((layer) => {
+            this.removeLayer(layer);
+        }, this);
+
+
+        let len = latlngs.length;
+        for (let i = 1; i < len; ++i) {
+            optionIdx = optionIdxFn.call(
+                fnContext, latlngs[i], latlngs[i - 1], i, latlngs);
+
+            if (i === 1) {
+                segmentLatlngs = [latlngs[0]];
+                prevOptionIdx = optionIdxFn.call(fnContext, latlngs[0], latlngs[0], 0, latlngs);
+            }
+
+            segmentLatlngs.push(latlngs[i]);
+
+            // is there a change in options or is it the last point?
+            if (prevOptionIdx !== optionIdx || i === len - 1) {
+                // Check if options is a function or an array
+                if (typeof multiOptions.options === "function") {
+                    this.addLayer(new Polyline(segmentLatlngs, multiOptions.options(prevOptionIdx)));
+                } else {
+                    this.addLayer(new Polyline(segmentLatlngs, multiOptions.options[prevOptionIdx]));
+                }
+
+                prevOptionIdx = optionIdx;
+                segmentLatlngs = [latlngs[i]];
+            }
+        }
+    }
+
+    getLatLngs(): Array<LatLng> {
+        return this._originalLatlngs;
+    }
+
+    getLatLngsSegments():Array< Array<LatLng> > {
+        let latlngs:Array< Array<LatLng> > = [];
+
+        this.eachLayer((layer) => {
+            if(layer instanceof Polyline){
+                latlngs.push(layer.getLatLngs());
+            }
+        });
+
+        return latlngs;
+    }
+}
\ No newline at end of file
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..78503ea
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,18 @@
+{
+    "compilerOptions": {
+        "outDir": "./dist/",
+        "sourceMap": false,
+        "noImplicitAny": true,
+        "module": "es2015",
+        "target": "es5",
+        "experimentalDecorators":true,
+        "lib": [
+            "dom",
+            "es2016",
+            "es2017.object"
+        ]
+    },
+    "include": [
+        "./src/**/*"
+    ]
+}