diff --git a/.gitignore b/.gitignore
index 80e5be4..682b2cc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 node_modules
 .DS_Store
 
+package-lock.json
diff --git a/package.json b/package.json
index 0481319..dc664c8 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "pathseg",
-  "version": "1.2.1",
+  "version": "1.3.0",
   "description": "A polyfill for SVG's SVGPathSeg and SVGPathSegList",
   "main": "pathseg.js",
   "directories": {
@@ -22,5 +22,13 @@
     "pathseg",
     "SVGPathSeg",
     "SVGPathSegList"
-  ]
+  ],
+  "types": "pathseg.d.ts",
+  "typesVersions": {
+    "<4.4": {
+      "*": [
+        "ts4.3"
+      ]
+    }
+  }
 }
diff --git a/pathseg.d.ts b/pathseg.d.ts
new file mode 100644
index 0000000..dd81d90
--- /dev/null
+++ b/pathseg.d.ts
@@ -0,0 +1,335 @@
+export interface SVGElementInstance extends EventTarget {
+    readonly correspondingElement: SVGElement;
+    readonly correspondingUseElement: SVGUseElement;
+}
+
+interface SVGElementInstanceList {
+    /** @deprecated */
+    readonly length: number;
+
+    /** @deprecated */
+    item(index: number): SVGElementInstance;
+}
+
+interface SVGPathSeg {
+    readonly pathSegType: number;
+    readonly pathSegTypeAsLetter: string;
+    readonly PATHSEG_ARC_ABS: number;
+    readonly PATHSEG_ARC_REL: number;
+    readonly PATHSEG_CLOSEPATH: number;
+    readonly PATHSEG_CURVETO_CUBIC_ABS: number;
+    readonly PATHSEG_CURVETO_CUBIC_REL: number;
+    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_ABS: number;
+    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_REL: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_ABS: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_REL: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL: number;
+    readonly PATHSEG_LINETO_ABS: number;
+    readonly PATHSEG_LINETO_HORIZONTAL_ABS: number;
+    readonly PATHSEG_LINETO_HORIZONTAL_REL: number;
+    readonly PATHSEG_LINETO_REL: number;
+    readonly PATHSEG_LINETO_VERTICAL_ABS: number;
+    readonly PATHSEG_LINETO_VERTICAL_REL: number;
+    readonly PATHSEG_MOVETO_ABS: number;
+    readonly PATHSEG_MOVETO_REL: number;
+    readonly PATHSEG_UNKNOWN: number;
+}
+
+declare var SVGPathSeg: {
+    prototype: SVGPathSeg;
+    new(): SVGPathSeg;
+    readonly PATHSEG_ARC_ABS: number;
+    readonly PATHSEG_ARC_REL: number;
+    readonly PATHSEG_CLOSEPATH: number;
+    readonly PATHSEG_CURVETO_CUBIC_ABS: number;
+    readonly PATHSEG_CURVETO_CUBIC_REL: number;
+    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_ABS: number;
+    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_REL: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_ABS: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_REL: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL: number;
+    readonly PATHSEG_LINETO_ABS: number;
+    readonly PATHSEG_LINETO_HORIZONTAL_ABS: number;
+    readonly PATHSEG_LINETO_HORIZONTAL_REL: number;
+    readonly PATHSEG_LINETO_REL: number;
+    readonly PATHSEG_LINETO_VERTICAL_ABS: number;
+    readonly PATHSEG_LINETO_VERTICAL_REL: number;
+    readonly PATHSEG_MOVETO_ABS: number;
+    readonly PATHSEG_MOVETO_REL: number;
+    readonly PATHSEG_UNKNOWN: number;
+};
+
+interface SVGPathSegArcAbs extends SVGPathSeg {
+    angle: number;
+    largeArcFlag: boolean;
+    r1: number;
+    r2: number;
+    sweepFlag: boolean;
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegArcAbs: {
+    prototype: SVGPathSegArcAbs;
+    new(): SVGPathSegArcAbs;
+};
+
+interface SVGPathSegArcRel extends SVGPathSeg {
+    angle: number;
+    largeArcFlag: boolean;
+    r1: number;
+    r2: number;
+    sweepFlag: boolean;
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegArcRel: {
+    prototype: SVGPathSegArcRel;
+    new(): SVGPathSegArcRel;
+};
+
+interface SVGPathSegClosePath extends SVGPathSeg {
+}
+
+declare var SVGPathSegClosePath: {
+    prototype: SVGPathSegClosePath;
+    new(): SVGPathSegClosePath;
+};
+
+interface SVGPathSegCurvetoCubicAbs extends SVGPathSeg {
+    x: number;
+    x1: number;
+    x2: number;
+    y: number;
+    y1: number;
+    y2: number;
+}
+
+declare var SVGPathSegCurvetoCubicAbs: {
+    prototype: SVGPathSegCurvetoCubicAbs;
+    new(): SVGPathSegCurvetoCubicAbs;
+};
+
+interface SVGPathSegCurvetoCubicRel extends SVGPathSeg {
+    x: number;
+    x1: number;
+    x2: number;
+    y: number;
+    y1: number;
+    y2: number;
+}
+
+declare var SVGPathSegCurvetoCubicRel: {
+    prototype: SVGPathSegCurvetoCubicRel;
+    new(): SVGPathSegCurvetoCubicRel;
+};
+
+interface SVGPathSegCurvetoCubicSmoothAbs extends SVGPathSeg {
+    x: number;
+    x2: number;
+    y: number;
+    y2: number;
+}
+
+declare var SVGPathSegCurvetoCubicSmoothAbs: {
+    prototype: SVGPathSegCurvetoCubicSmoothAbs;
+    new(): SVGPathSegCurvetoCubicSmoothAbs;
+};
+
+interface SVGPathSegCurvetoCubicSmoothRel extends SVGPathSeg {
+    x: number;
+    x2: number;
+    y: number;
+    y2: number;
+}
+
+declare var SVGPathSegCurvetoCubicSmoothRel: {
+    prototype: SVGPathSegCurvetoCubicSmoothRel;
+    new(): SVGPathSegCurvetoCubicSmoothRel;
+};
+
+interface SVGPathSegCurvetoQuadraticAbs extends SVGPathSeg {
+    x: number;
+    x1: number;
+    y: number;
+    y1: number;
+}
+
+declare var SVGPathSegCurvetoQuadraticAbs: {
+    prototype: SVGPathSegCurvetoQuadraticAbs;
+    new(): SVGPathSegCurvetoQuadraticAbs;
+};
+
+interface SVGPathSegCurvetoQuadraticRel extends SVGPathSeg {
+    x: number;
+    x1: number;
+    y: number;
+    y1: number;
+}
+
+declare var SVGPathSegCurvetoQuadraticRel: {
+    prototype: SVGPathSegCurvetoQuadraticRel;
+    new(): SVGPathSegCurvetoQuadraticRel;
+};
+
+interface SVGPathSegCurvetoQuadraticSmoothAbs extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegCurvetoQuadraticSmoothAbs: {
+    prototype: SVGPathSegCurvetoQuadraticSmoothAbs;
+    new(): SVGPathSegCurvetoQuadraticSmoothAbs;
+};
+
+interface SVGPathSegCurvetoQuadraticSmoothRel extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegCurvetoQuadraticSmoothRel: {
+    prototype: SVGPathSegCurvetoQuadraticSmoothRel;
+    new(): SVGPathSegCurvetoQuadraticSmoothRel;
+};
+
+interface SVGPathSegLinetoAbs extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegLinetoAbs: {
+    prototype: SVGPathSegLinetoAbs;
+    new(): SVGPathSegLinetoAbs;
+};
+
+interface SVGPathSegLinetoHorizontalAbs extends SVGPathSeg {
+    x: number;
+}
+
+declare var SVGPathSegLinetoHorizontalAbs: {
+    prototype: SVGPathSegLinetoHorizontalAbs;
+    new(): SVGPathSegLinetoHorizontalAbs;
+};
+
+interface SVGPathSegLinetoHorizontalRel extends SVGPathSeg {
+    x: number;
+}
+
+declare var SVGPathSegLinetoHorizontalRel: {
+    prototype: SVGPathSegLinetoHorizontalRel;
+    new(): SVGPathSegLinetoHorizontalRel;
+};
+
+interface SVGPathSegLinetoRel extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegLinetoRel: {
+    prototype: SVGPathSegLinetoRel;
+    new(): SVGPathSegLinetoRel;
+};
+
+interface SVGPathSegLinetoVerticalAbs extends SVGPathSeg {
+    y: number;
+}
+
+declare var SVGPathSegLinetoVerticalAbs: {
+    prototype: SVGPathSegLinetoVerticalAbs;
+    new(): SVGPathSegLinetoVerticalAbs;
+};
+
+interface SVGPathSegLinetoVerticalRel extends SVGPathSeg {
+    y: number;
+}
+
+declare var SVGPathSegLinetoVerticalRel: {
+    prototype: SVGPathSegLinetoVerticalRel;
+    new(): SVGPathSegLinetoVerticalRel;
+};
+
+interface SVGPathSegList {
+    readonly numberOfItems: number;
+
+    appendItem(newItem: SVGPathSeg): SVGPathSeg;
+
+    clear(): void;
+
+    getItem(index: number): SVGPathSeg;
+
+    initialize(newItem: SVGPathSeg): SVGPathSeg;
+
+    insertItemBefore(newItem: SVGPathSeg, index: number): SVGPathSeg;
+
+    removeItem(index: number): SVGPathSeg;
+
+    replaceItem(newItem: SVGPathSeg, index: number): SVGPathSeg;
+}
+
+declare var SVGPathSegList: {
+    prototype: SVGPathSegList;
+    new(): SVGPathSegList;
+};
+
+interface SVGPathSegMovetoAbs extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegMovetoAbs: {
+    prototype: SVGPathSegMovetoAbs;
+    new(): SVGPathSegMovetoAbs;
+};
+
+interface SVGPathSegMovetoRel extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegMovetoRel: {
+    prototype: SVGPathSegMovetoRel;
+    new(): SVGPathSegMovetoRel;
+};
+
+interface SVGZoomAndPan {
+    zoomAndPan: number;
+    readonly SVG_ZOOMANDPAN_DISABLE: number;
+    readonly SVG_ZOOMANDPAN_MAGNIFY: number;
+    readonly SVG_ZOOMANDPAN_UNKNOWN: number;
+}
+
+interface SVGZoomEvent extends UIEvent {
+    readonly newScale: number;
+    readonly newTranslate: SVGPoint;
+    readonly previousScale: number;
+    readonly previousTranslate: SVGPoint;
+    readonly zoomRectScreen: SVGRect;
+}
+
+declare var SVGZoomEvent: {
+    prototype: SVGZoomEvent;
+    new(): SVGZoomEvent;
+};
+
+interface SVGPathElement extends SVGGraphicsElement {
+    /** @deprecated */
+    readonly pathSegList?: SVGPathSegList;
+
+    getPointAtLength(distance: number): SVGPoint;
+
+    getTotalLength(): number;
+}
+
+declare var SVGPathElement: {
+    prototype: SVGPathElement;
+    new(): SVGPathElement;
+};
+
+declare global {
+    interface Window {
+        SVGPathSeg: SVGPathSeg;
+    }
+}
diff --git a/ts4.3/pathseg.d.ts b/ts4.3/pathseg.d.ts
new file mode 100644
index 0000000..aa6e54f
--- /dev/null
+++ b/ts4.3/pathseg.d.ts
@@ -0,0 +1 @@
+// nothing to add, TypeScript 4.4 removed all the types used here
\ No newline at end of file