diff --git a/.gitignore b/.gitignore
index ed16bba..6bdbe62 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,2 @@
-/dist/
 /node_modules/
 /.idea/
diff --git a/dist/browserSupport.d.ts b/dist/browserSupport.d.ts
new file mode 100644
index 0000000..752a8c7
--- /dev/null
+++ b/dist/browserSupport.d.ts
@@ -0,0 +1,15 @@
+import { PgsRendererMode } from "./pgsRendererMode";
+export declare class BrowserSupport {
+    /**
+     * Checks if the web worker is supported in the current environment.
+     */
+    static isWorkerSupported(): boolean;
+    /**
+     * Checks if the offscreen-canvas and `transferControlToOffscreen` are supported in the current environment.
+     */
+    static isOffscreenCanvasSupported(): boolean;
+    /**
+     * Returns the optimal PGS renderer mode for the current platform.
+     */
+    static getRendererModeByPlatform(): PgsRendererMode;
+}
diff --git a/dist/libpgs.d.ts b/dist/libpgs.d.ts
new file mode 100644
index 0000000..04c9c19
--- /dev/null
+++ b/dist/libpgs.d.ts
@@ -0,0 +1,4 @@
+import "core-js/stable/promise";
+import "whatwg-fetch";
+import { PgsRenderer } from "./pgsRenderer";
+export { PgsRenderer };
diff --git a/dist/libpgs.js b/dist/libpgs.js
new file mode 100644
index 0000000..c1fcf0f
--- /dev/null
+++ b/dist/libpgs.js
@@ -0,0 +1 @@
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n},t}(),Ru=function(){function t(){this.displaySets=[],this.updateTimestamps=[]}return t.prototype.loadFromUrl=function(t,e){return uu(this,void 0,void 0,(function(){var r,n,i,o,a;return su(this,(function(u){switch(u.label){case 0:return[4,fetch(t)];case 1:if(!(r=u.sent()).ok)throw new Error("HTTP error: ".concat(r.status));return(n=null===(a=r.body)||void 0===a?void 0:a.getReader())?(i=new Au(n),[3,4]):[3,2];case 2:return[4,r.arrayBuffer()];case 3:o=u.sent(),i=new yu(new Uint8Array(o)),u.label=4;case 4:return[4,this.loadFromReader(i,e)];case 5:return u.sent(),[2]}}))}))},t.prototype.loadFromBuffer=function(t,e){return uu(this,void 0,void 0,(function(){return su(this,(function(r){switch(r.label){case 0:return[4,this.loadFromReader(new yu(new Uint8Array(t)),e)];case 1:return r.sent(),[2]}}))}))},t.prototype.loadFromReader=function(t,e){return uu(this,void 0,void 0,(function(){var r,n,i,o;return su(this,(function(a){switch(a.label){case 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diff --git a/dist/libpgs.worker.js b/dist/libpgs.worker.js
new file mode 100644
index 0000000..e48c0c2
--- /dev/null
+++ b/dist/libpgs.worker.js
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t.prototype.draw=function(t){this.canvas&&this.context&&(this.dirtyArea.empty||(this.context.clearRect(this.dirtyArea.x,this.dirtyArea.y,this.dirtyArea.width,this.dirtyArea.height),this.dirtyArea.reset()),t&&(this.canvas.width==t.width&&this.canvas.height==t.height||(this.canvas.width=t.width,this.canvas.height=t.height),this.drawSubtitleData(t,this.dirtyArea)))},t.prototype.drawSubtitleData=function(t,e){for(var r=0,n=t.compositionData;r<n.length;r++){var i=n[r];this.drawSubtitleCompositionData(i,e)}},t.prototype.drawSubtitleCompositionData=function(t,e){var r,n,i=t.compositionObject;i.hasCropping?(null===(r=this.context)||void 0===r||r.putImageData(t.pixelData,i.horizontalPosition,i.verticalPosition,i.croppingHorizontalPosition,i.croppingVerticalPosition,i.croppingWidth,i.croppingHeight),null==e||e.union(i.horizontalPosition,i.verticalPosition,i.croppingWidth,i.croppingHeight)):(null===(n=this.context)||void 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this.baseReader.readByte()},t.prototype.readUInt16=function(){return(this.baseReader.readByte()<<8)+this.baseReader.readByte()},t.prototype.readUInt24=function(){return(this.baseReader.readByte()<<16)+(this.baseReader.readByte()<<8)+this.baseReader.readByte()},t.prototype.readUInt32=function(){return(this.baseReader.readByte()<<24)+(this.baseReader.readByte()<<16)+(this.baseReader.readByte()<<8)+this.baseReader.readByte()},t.prototype.readBytes=function(t){return this.baseReader.readBytes(t)},t}();!function(t){t[t.paletteDefinition=20]="paletteDefinition",t[t.objectDefinition=21]="objectDefinition",t[t.presentationComposition=22]="presentationComposition",t[t.windowDefinition=23]="windowDefinition",t[t.end=128]="end"}(Cu||(Cu={}));var Lu=function(){function t(){this.id=0,this.windowId=0,this.croppedFlag=0,this.horizontalPosition=0,this.verticalPosition=0,this.croppingHorizontalPosition=0,this.croppingVerticalPosition=0,this.croppingWidth=0,this.croppingHeight=0}return Object.defineProperty(t.prototype,"hasCropping",{get:function(){return!!(128&this.croppedFlag)},enumerable:!1,configurable:!0}),t}(),ku=function(){function t(){this.width=0,this.height=0,this.frameRate=0,this.compositionNumber=0,this.compositionState=0,this.paletteUpdateFlag=0,this.paletteId=0,this.compositionObjects=[]}return Object.defineProperty(t.prototype,"segmentType",{get:function(){return Cu.presentationComposition},enumerable:!1,configurable:!0}),t.prototype.read=function(t,e){this.width=t.readUInt16(),this.height=t.readUInt16(),this.frameRate=t.readUInt8(),this.compositionNumber=t.readUInt16(),this.compositionState=t.readUInt8(),this.paletteUpdateFlag=t.readUInt8(),this.paletteId=t.readUInt8();var r=t.readUInt8();this.compositionObjects=[];for(var n=0;n<r;n++){var i=new 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u=e.readUInt8(),s=e.readUInt8(),c=e.readUInt8()-128,f=e.readUInt8()-128,h=e.readUInt8(),p=t.clamp(Math.round(s+1.402*c),0,255),l=t.clamp(Math.round(s-.34414*f-.71414*c),0,255),d=t.clamp(Math.round(s+1.772*f),0,255);o[0]=p,o[1]=l,o[2]=d,o[3]=h,this.rgba[u]=i[0]}},t.clamp=function(t,e,r){return t<e?e:t>r?r:t},t}(),Mu=function(){function t(){this.id=0,this.versionNumber=0,this.lastInSequenceFlag=0,this.width=0,this.height=0,this.dataLength=0}return Object.defineProperty(t.prototype,"isFirstInSequence",{get:function(){return!!(128&this.lastInSequenceFlag)},enumerable:!1,configurable:!0}),Object.defineProperty(t.prototype,"isLastInSequence",{get:function(){return!!(64&this.lastInSequenceFlag)},enumerable:!1,configurable:!0}),Object.defineProperty(t.prototype,"segmentType",{get:function(){return Cu.objectDefinition},enumerable:!1,configurable:!0}),t.prototype.read=function(t,e){this.id=t.readUInt16(),this.versionNumber=t.readUInt8(),this.lastInSequenceFlag=t.readUInt8(),this.isFirstInSequence?(this.dataLength=t.readUInt24(),this.width=t.readUInt16(),this.height=t.readUInt16(),this.data=t.readBytes(e-11)):this.data=t.readBytes(e-4)},t}(),qu=function(){this.id=0,this.horizontalPosition=0,this.verticalPosition=0,this.width=0,this.height=0},Hu=function(){function t(){this.windows=[]}return Object.defineProperty(t.prototype,"segmentType",{get:function(){return Cu.windowDefinition},enumerable:!1,configurable:!0}),t.prototype.read=function(t,e){var r=t.readUInt8();this.windows=[];for(var n=0;n<r;n++){var i=new qu;i.id=t.readUInt8(),i.horizontalPosition=t.readUInt16(),i.verticalPosition=t.readUInt16(),i.width=t.readUInt16(),i.height=t.readUInt16(),this.windows.push(i)}},t}(),Gu=function(){function t(){this.presentationTimestamp=0,this.decodingTimestamp=0,this.paletteDefinitions=[],this.objectDefinitions=[],this.windowDefinitions=[]}return t.prototype.read=function(t,e){return Du(this,void 0,void 0,(function(){var r,n,i,o,a,u,s,c,f;return Bu(this,(function(h){switch(h.label){case 0:this.presentationTimestamp=0,this.decodingTimestamp=0,this.presentationComposition=void 0,this.paletteDefinitions=[],this.objectDefinitions=[],this.windowDefinitions=[],r=void 0,"requestData"in t.baseReader&&(r=t.baseReader),h.label=1;case 1:return n=0,i=0,e?[4,null==r?void 0:r.requestData(10)]:[3,3];case 2:if(h.sent(),20551!=t.readUInt16())throw new Error("Invalid magic number!");n=t.readUInt32(),i=t.readUInt32(),h.label=3;case 3:return[4,null==r?void 0:r.requestData(3)];case 4:return h.sent(),o=t.readUInt8(),a=t.readUInt16(),[4,null==r?void 0:r.requestData(a)];case 5:switch(h.sent(),o){case Cu.paletteDefinition:(u=new Nu).read(t,a),this.paletteDefinitions.push(u);break;case Cu.objectDefinition:(s=new Mu).read(t,a),this.objectDefinitions.push(s);break;case Cu.presentationComposition:(c=new ku).read(t,a),this.presentationComposition=c,this.presentationTimestamp=n,this.decodingTimestamp=i;break;case Cu.windowDefinition:(f=new Hu).read(t,a),this.windowDefinitions.push(f);break;case Cu.end:return[2];default:throw new Error("Unsupported segment type ".concat(o))}return[3,1];case 6:return[2]}}))}))},t}(),zu=function(){function t(t){this.$position=0,this.subReaderIndex=0,this.subReaders=t.map((function(t){return t instanceof Uint8Array?new _u(t):t}));for(var e=0,r=0,n=t;r<n.length;r++){e+=n[r].length}this.$length=e}return t.prototype.push=function(t){t instanceof Uint8Array?this.subReaders.push(new _u(t)):this.subReaders.push(t),this.$length+=t.length},Object.defineProperty(t.prototype,"position",{get:function(){return this.$position},enumerable:!1,configurable:!0}),Object.defineProperty(t.prototype,"length",{get:function(){return this.$length},enumerable:!1,configurable:!0}),Object.defineProperty(t.prototype,"eof",{get:function(){return this.position>=this.length},enumerable:!1,configurable:!0}),t.prototype.readByte=function(){for(;this.subReaders[this.subReaderIndex].position>=this.subReaders[this.subReaderIndex].length;)this.subReaderIndex++;return this.$position++,this.subReaders[this.subReaderIndex].readByte()},t.prototype.readBytes=function(t){for(var e=new Uint8Array(t),r=0;r<t;r++)e[r]=this.readByte();return e},t}(),$u=function(){function t(t){this.$eof=!1,this.stream=t,this.reader=new zu([])}return Object.defineProperty(t.prototype,"position",{get:function(){return this.reader.position},enumerable:!1,configurable:!0}),Object.defineProperty(t.prototype,"length",{get:function(){return this.reader.length},enumerable:!1,configurable:!0}),Object.defineProperty(t.prototype,"eof",{get:function(){return this.$eof},enumerable:!1,configurable:!0}),t.prototype.readByte=function(){return this.reader.readByte()},t.prototype.readBytes=function(t){return this.reader.readBytes(t)},t.prototype.requestData=function(){return Du(this,arguments,void 0,(function(t){var e,r,n;return void 0===t&&(t=0),Bu(this,(function(i){switch(i.label){case 0:return this.reader.position+t+1>this.reader.length&&!this.$eof?[4,this.stream.read()]:[3,2];case 1:return e=i.sent(),r=e.value,n=e.done,r&&this.reader.push(r),n&&(this.$eof=!0),[3,0];case 2:return[2,this.reader.position+t<=this.reader.length]}}))}))},t}(),Vu=function(t,e,r){this.width=t,this.height=e,this.compositionData=r},Wu=function(t,e,r){this.compositionObject=t,this.window=e,this.pixelData=r},Ju=function(){function t(){}return t.decode=function(t,e,r){t instanceof Uint8Array&&(t=new _u(t));for(var n=0;t.position<t.length;){var i=t.readByte();if(0==i){var o=t.readByte();if(0!=o){var a=!!(128&o),u=63&o;!!(64&o)&&(u=(u<<8)+t.readByte());for(var s=a?t.readByte():0,c=0;c<u;c++)r[n++]=e[s]}}else r[n++]=e[i]}return n},t}(),Xu=function(){function t(){}return t.getIndexFromTimestamps=function(t,e){var r=1e3*t*90,n=-1;if(e.length>0&&r<e[e.length-1])for(var i=0,o=e;i<o.length;i++){if(o[i]>r)break;n++}return n},t}(),Yu=new(function(){function t(){this.displaySets=[],this.updateTimestamps=[]}return t.prototype.loadFromUrl=function(t,e){return Du(this,void 0,void 0,(function(){var r,n,i,o,a;return Bu(this,(function(u){switch(u.label){case 0:return[4,fetch(t)];case 1:if(!(r=u.sent()).ok)throw new Error("HTTP error: ".concat(r.status));return(n=null===(a=r.body)||void 0===a?void 0:a.getReader())?(i=new $u(n),[3,4]):[3,2];case 2:return[4,r.arrayBuffer()];case 3:o=u.sent(),i=new _u(new Uint8Array(o)),u.label=4;case 4:return[4,this.loadFromReader(i,e)];case 5:return u.sent(),[2]}}))}))},t.prototype.loadFromBuffer=function(t,e){return Du(this,void 0,void 0,(function(){return Bu(this,(function(r){switch(r.label){case 0:return[4,this.loadFromReader(new _u(new Uint8Array(t)),e)];case 1:return r.sent(),[2]}}))}))},t.prototype.loadFromReader=function(t,e){return Du(this,void 0,void 0,(function(){var r,n,i,o;return Bu(this,(function(a){switch(a.label){case 0:this.displaySets=[],this.updateTimestamps=[],this.cachedSubtitleData=void 0,r=performance.now(),n=new Fu(t),a.label=1;case 1:return t.eof?[3,3]:[4,(i=new Gu).read(n,!0)];case 2:return a.sent(),this.displaySets.push(i),this.updateTimestamps.push(i.presentationTimestamp),(null==e?void 0:e.onProgress)&&(o=performance.now())>r+1e3&&(r=o,e.onProgress()),[3,1];case 3:return(null==e?void 0:e.onProgress)&&e.onProgress(),[2]}}))}))},t.prototype.cacheSubtitleAtIndex=function(t){var e=this.getSubtitleAtIndex(t);this.cachedSubtitleData={index:t,data:e}},t.prototype.getSubtitleAtTimestamp=function(t){var e=Xu.getIndexFromTimestamps(t,this.updateTimestamps);return this.getSubtitleAtIndex(e)},t.prototype.getSubtitleAtIndex=function(t){var e;if(this.cachedSubtitleData&&this.cachedSubtitleData.index===t)return this.cachedSubtitleData.data;if(!(t<0||t>=this.displaySets.length)){var r=this.displaySets[t];if(r.presentationComposition){for(var n=[],i=[],o=[],a=t;a>=0;){var u=this.displaySets[a];n.unshift.apply(n,u.objectDefinitions),i.unshift.apply(i,u.paletteDefinitions);for(var s=0,c=u.windowDefinitions;s<c.length;s++){var f=c[s];o.unshift.apply(o,f.windows)}if(0!==(null===(e=this.displaySets[a].presentationComposition)||void 0===e?void 0:e.compositionState))break;a--}var h=i.find((function(t){var e;return t.id===(null===(e=r.presentationComposition)||void 0===e?void 0:e.paletteId)}));if(h){for(var p=[],l=function(t){var e=o.find((function(e){return e.id===t.windowId}));if(!e)return"continue";var r=d.getPixelDataFromComposition(t,h,n);r&&p.push(new Wu(t,e,r))},d=this,y=0,v=r.presentationComposition.compositionObjects;y<v.length;y++){l(v[y])}if(0!==p.length)return new Vu(r.presentationComposition.width,r.presentationComposition.height,p)}}}},t.prototype.getPixelDataFromComposition=function(t,e,r){for(var n=0,i=0,o=[],a=0,u=r;a<u.length;a++){var s=u[a];s.id==t.id&&(s.isFirstInSequence&&(n=s.width,i=s.height),s.data&&o.push(s.data))}if(0!=o.length){var c=new zu(o);if("undefined"!=typeof document){var f=document.createElement("canvas").getContext("2d").createImageData(n,i),h=new Uint32Array(f.data.buffer);return Ju.decode(c,e.rgba,h),f}h=new Uint32Array(n*i);return Ju.decode(c,e.rgba,h),new ImageData(new Uint8ClampedArray(h.buffer),n,i)}},t}()),Ku=void 0,Zu=function(){postMessage({op:"updateTimestamps",updateTimestamps:Yu.updateTimestamps})},Qu=function(t){postMessage({op:"loaded",error:t})};onmessage=function(t){switch(t.data.op){case"init":var e=t.data.canvas;e&&(Ku=new Uu(e));break;case"loadFromUrl":var r=t.data.url;Yu.loadFromUrl(r,{onProgress:function(){Zu()}}).then((function(){Zu(),Qu()})).catch((function(t){Qu("".concat(t))}));break;case"loadFromBuffer":var n=t.data.buffer;Yu.loadFromBuffer(n).then((function(){Zu(),Qu()})).catch((function(t){Qu("".concat(t))}));break;case"render":var i=t.data.index,o=Yu.getSubtitleAtIndex(i);requestAnimationFrame((function(){null==Ku||Ku.draw(o)})),Yu.cacheSubtitleAtIndex(i+1);break;case"requestSubtitleData":i=t.data.index;var a=Yu.getSubtitleAtIndex(i);postMessage({op:"subtitleData",index:i,subtitleData:a}),Yu.cacheSubtitleAtIndex(i+1)}};
diff --git a/dist/pgs.d.ts b/dist/pgs.d.ts
new file mode 100644
index 0000000..b54641b
--- /dev/null
+++ b/dist/pgs.d.ts
@@ -0,0 +1,60 @@
+import { DisplaySet } from "./pgs/displaySet";
+import { BinaryReader } from "./utils/binaryReader";
+import { SubtitleData } from "./subtitleData";
+export interface PgsLoadOptions {
+    /**
+     * Async pgs streams can return partial updates. When invoked, the `displaySets` and `updateTimestamps` are updated
+     * to the last available subtitle. There is a minimum threshold of one-second to prevent to many updates.
+     */
+    onProgress?: () => void;
+}
+/**
+ * The PGS subtitle data class. This can load and cache sup files from a buffer or url.
+ * It can also build image data for a given timestamp or timestamp index.
+ */
+export declare class Pgs {
+    /**
+     * The currently loaded display sets.
+     */
+    displaySets: DisplaySet[];
+    /**
+     * The PGS timestamps when a display set with the same index is presented.
+     */
+    updateTimestamps: number[];
+    /**
+     * Loads the subtitle file from the given url.
+     * @param url The url to the PGS file.
+     * @param options Optional loading options. Use `onProgress` as callback for partial update while loading.
+     */
+    loadFromUrl(url: string, options?: PgsLoadOptions): Promise<void>;
+    /**
+     * Loads the subtitle file from the given buffer.
+     * @param buffer The PGS data.
+     * @param options Optional loading options. Use `onProgress` as callback for partial update while loading.
+     */
+    loadFromBuffer(buffer: ArrayBuffer, options?: PgsLoadOptions): Promise<void>;
+    /**
+     * Loads the subtitle file from the given buffer.
+     * @param reader The PGS data reader.
+     * @param options Optional loading options. Use `onProgress` as callback for partial update while loading.
+     */
+    loadFromReader(reader: BinaryReader, options?: PgsLoadOptions): Promise<void>;
+    private cachedSubtitleData?;
+    /**
+     * Pre-compiles and caches the subtitle data for the given index.
+     * This will speed up the next call to `buildSubtitleDataAtIndex` with the same index.
+     * @param index The index of the display set to cache.
+     */
+    cacheSubtitleAtIndex(index: number): void;
+    /**
+     * Renders the subtitle at the given timestamp.
+     * @param time The timestamp in seconds.
+     */
+    getSubtitleAtTimestamp(time: number): SubtitleData | undefined;
+    /**
+     * Pre-compiles the required subtitle data (windows and pixel data) for the frame at the given index.
+     * @param index The index of the display set to render.
+     */
+    getSubtitleAtIndex(index: number): SubtitleData | undefined;
+    private getPixelDataFromComposition;
+}
diff --git a/dist/pgs/displaySet.d.ts b/dist/pgs/displaySet.d.ts
new file mode 100644
index 0000000..f98deb6
--- /dev/null
+++ b/dist/pgs/displaySet.d.ts
@@ -0,0 +1,23 @@
+import { BigEndianBinaryReader } from "../utils/bigEndianBinaryReader";
+import { PresentationCompositionSegment } from "./presentationCompositionSegment";
+import { PaletteDefinitionSegment } from "./paletteDefinitionSegment";
+import { ObjectDefinitionSegment } from "./objectDefinitionSegment";
+import { WindowDefinitionSegment } from "./windowDefinitionSegment";
+/**
+ * The PGS display set holds all data for the current subtitle update at a given timestamp.
+ */
+export declare class DisplaySet {
+    presentationTimestamp: number;
+    decodingTimestamp: number;
+    presentationComposition?: PresentationCompositionSegment;
+    paletteDefinitions: PaletteDefinitionSegment[];
+    objectDefinitions: ObjectDefinitionSegment[];
+    windowDefinitions: WindowDefinitionSegment[];
+    /**
+     * Reads a display set from the given binary reader. The current data is cleared.
+     * @param reader The binary reader to read from.
+     * @param includeHeader If true, the magic-number and timestamps are read. If false, reading starts at the first
+     * segment.
+     */
+    read(reader: BigEndianBinaryReader, includeHeader: boolean): Promise<void>;
+}
diff --git a/dist/pgs/endSegment.d.ts b/dist/pgs/endSegment.d.ts
new file mode 100644
index 0000000..24d24f8
--- /dev/null
+++ b/dist/pgs/endSegment.d.ts
@@ -0,0 +1,6 @@
+import { BigEndianBinaryReader } from "../utils/bigEndianBinaryReader";
+import { Segment } from "./segment";
+export declare class EndSegment implements Segment {
+    get segmentType(): number;
+    read(reader: BigEndianBinaryReader, length: number): void;
+}
diff --git a/dist/pgs/objectDefinitionSegment.d.ts b/dist/pgs/objectDefinitionSegment.d.ts
new file mode 100644
index 0000000..0a0c789
--- /dev/null
+++ b/dist/pgs/objectDefinitionSegment.d.ts
@@ -0,0 +1,15 @@
+import { Segment } from "./segment";
+import { BigEndianBinaryReader } from "../utils/bigEndianBinaryReader";
+export declare class ObjectDefinitionSegment implements Segment {
+    id: number;
+    versionNumber: number;
+    lastInSequenceFlag: number;
+    width: number;
+    height: number;
+    dataLength: number;
+    data?: Uint8Array;
+    get isFirstInSequence(): boolean;
+    get isLastInSequence(): boolean;
+    get segmentType(): number;
+    read(reader: BigEndianBinaryReader, length: number): void;
+}
diff --git a/dist/pgs/paletteDefinitionSegment.d.ts b/dist/pgs/paletteDefinitionSegment.d.ts
new file mode 100644
index 0000000..a7ad31c
--- /dev/null
+++ b/dist/pgs/paletteDefinitionSegment.d.ts
@@ -0,0 +1,10 @@
+import { Segment } from "./segment";
+import { BigEndianBinaryReader } from "../utils/bigEndianBinaryReader";
+export declare class PaletteDefinitionSegment implements Segment {
+    id: number;
+    versionNumber: number;
+    rgba: number[];
+    get segmentType(): number;
+    read(reader: BigEndianBinaryReader, length: number): void;
+    private static clamp;
+}
diff --git a/dist/pgs/presentationCompositionSegment.d.ts b/dist/pgs/presentationCompositionSegment.d.ts
new file mode 100644
index 0000000..123877b
--- /dev/null
+++ b/dist/pgs/presentationCompositionSegment.d.ts
@@ -0,0 +1,26 @@
+import { Segment } from "./segment";
+import { BigEndianBinaryReader } from "../utils/bigEndianBinaryReader";
+export declare class CompositionObject {
+    id: number;
+    windowId: number;
+    croppedFlag: number;
+    horizontalPosition: number;
+    verticalPosition: number;
+    croppingHorizontalPosition: number;
+    croppingVerticalPosition: number;
+    croppingWidth: number;
+    croppingHeight: number;
+    get hasCropping(): boolean;
+}
+export declare class PresentationCompositionSegment implements Segment {
+    width: number;
+    height: number;
+    frameRate: number;
+    compositionNumber: number;
+    compositionState: number;
+    paletteUpdateFlag: number;
+    paletteId: number;
+    compositionObjects: CompositionObject[];
+    get segmentType(): number;
+    read(reader: BigEndianBinaryReader, length: number): void;
+}
diff --git a/dist/pgs/segment.d.ts b/dist/pgs/segment.d.ts
new file mode 100644
index 0000000..3f6a6c5
--- /dev/null
+++ b/dist/pgs/segment.d.ts
@@ -0,0 +1,13 @@
+import { BigEndianBinaryReader } from "../utils/bigEndianBinaryReader";
+export interface Segment {
+    /**
+     * Gets the {@link SegmentType} identifier byte.
+     */
+    get segmentType(): number;
+    /**
+     * Reads the segment from the data stream.
+     * @param reader The binary reader to read from.
+     * @param length The length of the segment in bytes.
+     */
+    read(reader: BigEndianBinaryReader, length: number): void;
+}
diff --git a/dist/pgs/segmentType.d.ts b/dist/pgs/segmentType.d.ts
new file mode 100644
index 0000000..a8019b8
--- /dev/null
+++ b/dist/pgs/segmentType.d.ts
@@ -0,0 +1,7 @@
+export declare enum SegmentType {
+    paletteDefinition = 20,
+    objectDefinition = 21,
+    presentationComposition = 22,
+    windowDefinition = 23,
+    end = 128
+}
diff --git a/dist/pgs/windowDefinitionSegment.d.ts b/dist/pgs/windowDefinitionSegment.d.ts
new file mode 100644
index 0000000..15825ed
--- /dev/null
+++ b/dist/pgs/windowDefinitionSegment.d.ts
@@ -0,0 +1,14 @@
+import { Segment } from "./segment";
+import { BigEndianBinaryReader } from "../utils/bigEndianBinaryReader";
+export declare class WindowDefinition {
+    id: number;
+    horizontalPosition: number;
+    verticalPosition: number;
+    width: number;
+    height: number;
+}
+export declare class WindowDefinitionSegment implements Segment {
+    windows: WindowDefinition[];
+    get segmentType(): number;
+    read(reader: BigEndianBinaryReader, length: number): void;
+}
diff --git a/dist/pgsRenderer.d.ts b/dist/pgsRenderer.d.ts
new file mode 100644
index 0000000..d3c5b39
--- /dev/null
+++ b/dist/pgsRenderer.d.ts
@@ -0,0 +1,70 @@
+import { PgsRendererOptions } from "./pgsRendererOptions";
+/**
+ * Renders PGS subtitle on-top of a video element using a canvas element. This also handles timestamp updates if a
+ * video element is provided.
+ */
+export declare class PgsRenderer {
+    /**
+     * Creates and starts a PGS subtitle render with the given option.
+     * @param options The PGS renderer options.
+     */
+    constructor(options: PgsRendererOptions);
+    /**
+     * Creates the PGS renderer implementation for the given option.
+     * @param options The PGS renderer options.
+     */
+    private createPgsRenderer;
+    private implementation;
+    /**
+     * Resolves once the last loaded subtitle file - `subUrl` included - can be rendered.
+     */
+    ready: Promise<void>;
+    /**
+     * Loads the subtitle file from the given url.
+     * @param url The url to the PGS file.
+     */
+    loadFromUrl(url: string): Promise<void>;
+    /**
+     * Loads the subtitle file from the given buffer.
+     * @param buffer The PGS data.
+     */
+    loadFromBuffer(buffer: ArrayBuffer): Promise<void>;
+    /**
+     * Renders the subtitle for the given timestamp.
+     * @param time The timestamp in seconds.
+     */
+    renderAtTimestamp(time: number): void;
+    private readonly video?;
+    private $timeOffset;
+    /**
+     * Gets the video-to-subtitle time offset in seconds.
+     */
+    get timeOffset(): number;
+    /**
+     * Sets the video-to-subtitle time offset and re-renders the current subtitle if needed.
+     * @param timeOffset The new time offset in seconds.
+     */
+    set timeOffset(timeOffset: number);
+    private registerVideoEvents;
+    private unregisterVideoEvents;
+    private onTimeUpdate;
+    private renderAtVideoTimestamp;
+    private readonly canvas;
+    private readonly canvasOwner;
+    private createCanvasElement;
+    private destroyCanvasElement;
+    private $aspectRatio;
+    /**
+     * Gets the aspect ratio mode of the canvas.
+     */
+    get aspectRatio(): 'contain' | 'cover' | 'fill';
+    /**
+     * Sets the aspect ratio mode of the canvas. This should match the `object-fit` property of the video.
+     * @param aspectMode The aspect mode.
+     */
+    set aspectRatio(aspectMode: 'contain' | 'cover' | 'fill');
+    /**
+     * Destroys the subtitle canvas and removes event listeners.
+     */
+    dispose(): void;
+}
diff --git a/dist/pgsRendererHelper.d.ts b/dist/pgsRendererHelper.d.ts
new file mode 100644
index 0000000..a68f83e
--- /dev/null
+++ b/dist/pgsRendererHelper.d.ts
@@ -0,0 +1,9 @@
+export declare class PgsRendererHelper {
+    /**
+     * Returns the array index position for the previous timestamp position from the given array.
+     * Returns -1 if the given time is outside the timestamp range.
+     * @param time The timestamp to check in seconds.
+     * @param pgsTimestamps The list of available PGS timestamps.
+     */
+    static getIndexFromTimestamps(time: number, pgsTimestamps: number[]): number;
+}
diff --git a/dist/pgsRendererImpl.d.ts b/dist/pgsRendererImpl.d.ts
new file mode 100644
index 0000000..5911244
--- /dev/null
+++ b/dist/pgsRendererImpl.d.ts
@@ -0,0 +1,47 @@
+/**
+ * The base for handling pgs loading and rendering. There are different ways to render a subtitle file. Modern browser
+ * support a more efficient asynchrone method using a web-worker. But if this isn't working for the current browser
+ * a more compatible implementation can be used.
+ */
+export declare abstract class PgsRendererImpl {
+    private updateTimestamps;
+    private previousTimestampIndex;
+    /**
+     * Is called when the timestamps were updated.
+     */
+    onTimestampsUpdated?: () => void;
+    /**
+     * Sets the update timestamps and invokes an update event.
+     * @param updateTimestamps The new array of update timestamps.
+     */
+    protected setUpdateTimestamps(updateTimestamps: number[]): void;
+    /**
+     * Renders the subtitle for the given timestamp.
+     * @param time The timestamp in seconds.
+     */
+    renderAtTimestamp(time: number): void;
+    /**
+     * Renders the subtitle at the given timestamp index.
+     * @param index The timestamp index.
+     */
+    renderAtIndex(index: number): void;
+    /**
+     * Renders the subtitle at the given timestamp index. Internal render method to overwrite.
+     * @param index The timestamp index.
+     */
+    protected abstract render(index: number): void;
+    /**
+     * Loads the subtitle file from the given url.
+     * @param url The url to the PGS file.
+     */
+    abstract loadFromUrl(url: string): Promise<void>;
+    /**
+     * Loads the subtitle file from the given buffer.
+     * @param buffer The PGS data.
+     */
+    abstract loadFromBuffer(buffer: ArrayBuffer): Promise<void>;
+    /**
+     * Disposes the renderer.
+     */
+    abstract dispose(): void;
+}
diff --git a/dist/pgsRendererInMainThread.d.ts b/dist/pgsRendererInMainThread.d.ts
new file mode 100644
index 0000000..1e830eb
--- /dev/null
+++ b/dist/pgsRendererInMainThread.d.ts
@@ -0,0 +1,29 @@
+import { PgsRendererImpl } from "./pgsRendererImpl";
+import { PgsRendererOptions } from "./pgsRendererOptions";
+/**
+ * The implementation without web workers. This loads and renders the subtitle in the main thread.
+ * This is meant as a compatibility fallback if advanced workers are not supported.
+ */
+export declare class PgsRendererInMainThread extends PgsRendererImpl {
+    constructor(options: PgsRendererOptions, canvas: HTMLCanvasElement);
+    /**
+     * The PGS loader.
+     * @private
+     */
+    private readonly pgs;
+    /**
+     * The subtitle renderer, running in the main thread.
+     */
+    private readonly renderer;
+    protected render(index: number): void;
+    loadFromUrl(url: string): Promise<void>;
+    loadFromBuffer(buffer: ArrayBuffer): Promise<void>;
+    /**
+     * Submits the update timestamps from the pgs loader and invokes events.
+     */
+    private invokeTimestampsUpdate;
+    /**
+     * Disposes the renderer.
+     */
+    dispose(): void;
+}
diff --git a/dist/pgsRendererInWorker.d.ts b/dist/pgsRendererInWorker.d.ts
new file mode 100644
index 0000000..aeae6c7
--- /dev/null
+++ b/dist/pgsRendererInWorker.d.ts
@@ -0,0 +1,32 @@
+import { PgsRendererImpl } from "./pgsRendererImpl";
+import { PgsRendererOptions } from "./pgsRendererOptions";
+/**
+ * The base implementation for a pgs renderer in side a worker.
+ */
+export declare abstract class PgsRendererInWorker extends PgsRendererImpl {
+    protected constructor(options: PgsRendererOptions);
+    loadFromUrl(url: string): Promise<void>;
+    loadFromBuffer(buffer: ArrayBuffer): Promise<void>;
+    /**
+     * The background worker.
+     */
+    protected readonly worker: Worker;
+    /**
+     * The loads the worker still has to answer, in the order it answers them.
+     */
+    private readonly pendingLoads;
+    /**
+     * Handles messages from the worker.
+     * @param e The event message.
+     */
+    private readonly $onWorkerMessage;
+    /**
+     * Handles messages from the worker.
+     * @param e The event message.
+     */
+    protected onWorkerMessage(e: MessageEvent): void;
+    /**
+     * Disposes the renderer and terminates the worker.
+     */
+    dispose(): void;
+}
diff --git a/dist/pgsRendererInWorkerWithOffscreenCanvas.d.ts b/dist/pgsRendererInWorkerWithOffscreenCanvas.d.ts
new file mode 100644
index 0000000..21fb02b
--- /dev/null
+++ b/dist/pgsRendererInWorkerWithOffscreenCanvas.d.ts
@@ -0,0 +1,10 @@
+import { PgsRendererOptions } from "./pgsRendererOptions";
+import { PgsRendererInWorker } from "./pgsRendererInWorker";
+/**
+ * A subtitle renderer running fully in a web-worker. It loads and renders the subtitles in the web-worker.
+ * This requires browser support for web-workers and offscreen-canvas.
+ */
+export declare class PgsRendererInWorkerWithOffscreenCanvas extends PgsRendererInWorker {
+    constructor(options: PgsRendererOptions, canvas: HTMLCanvasElement);
+    protected render(index: number): void;
+}
diff --git a/dist/pgsRendererInWorkerWithoutOffscreenCanvas.d.ts b/dist/pgsRendererInWorkerWithoutOffscreenCanvas.d.ts
new file mode 100644
index 0000000..5f82244
--- /dev/null
+++ b/dist/pgsRendererInWorkerWithoutOffscreenCanvas.d.ts
@@ -0,0 +1,15 @@
+import { PgsRendererInWorker } from "./pgsRendererInWorker";
+import { PgsRendererOptions } from "./pgsRendererOptions";
+/**
+ * A subtitle renderer running partially in a web-worker. It loads the subtitles in the web-worker, but rendering is
+ * done on the main thread. This still requires web-workers, but skips the requirement of the offscreen-canvas.
+ */
+export declare class PgsRendererInWorkerWithoutOffscreenCanvas extends PgsRendererInWorker {
+    constructor(options: PgsRendererOptions, canvas: HTMLCanvasElement);
+    /**
+     * The subtitle renderer, running in the main thread.
+     */
+    private readonly renderer;
+    protected render(index: number): void;
+    protected onWorkerMessage(e: MessageEvent): void;
+}
diff --git a/dist/pgsRendererMode.d.ts b/dist/pgsRendererMode.d.ts
new file mode 100644
index 0000000..3afd9fe
--- /dev/null
+++ b/dist/pgsRendererMode.d.ts
@@ -0,0 +1,14 @@
+export declare enum PgsRendererMode {
+    /**
+     * A worker thread is used to load, build and render the subtitles. This requires OffscreenCanvas support.
+     */
+    worker = "worker",
+    /**
+     * A worker thread is used to load and build the subtitles. They are rendered in the main thread.
+     */
+    workerWithoutOffscreenCanvas = "workerWithoutOffscreenCanvas",
+    /**
+     * The subtitles are loaded, built and rendered in the main thread.
+     */
+    mainThread = "mainThread"
+}
diff --git a/dist/pgsRendererOptions.d.ts b/dist/pgsRendererOptions.d.ts
new file mode 100644
index 0000000..88e1053
--- /dev/null
+++ b/dist/pgsRendererOptions.d.ts
@@ -0,0 +1,34 @@
+import { PgsRendererMode } from "./pgsRendererMode";
+export interface PgsRendererOptions {
+    /**
+     * The video element to sync the subtitle to.
+     * Optional, if you provide a custom canvas and use `renderAtTimestamp` to manually update the timestamp.
+     */
+    video?: HTMLVideoElement;
+    /**
+     * The initial canvas element to draw the subtitles to.
+     * If not provided, the renderer creates its own canvas next to the video element.
+     */
+    canvas?: HTMLCanvasElement;
+    /**
+     * The video-to-subtitle time offset in seconds.
+     */
+    timeOffset?: number;
+    /**
+     * The canvas aspect ratio mode. This should match the `object-fit` property of the video.
+     */
+    aspectRatio?: 'contain' | 'cover' | 'fill';
+    /**
+     * The initial subtitle file url to load from.
+     */
+    subUrl?: string;
+    /**
+     * The url to the worker javascript file.
+     */
+    workerUrl?: string;
+    /**
+     * The forced renderer mode.
+     * If not provided, the renderer checks the current browser to detect the best mode for your platform.
+     */
+    mode?: PgsRendererMode;
+}
diff --git a/dist/renderer.d.ts b/dist/renderer.d.ts
new file mode 100644
index 0000000..53f1bc7
--- /dev/null
+++ b/dist/renderer.d.ts
@@ -0,0 +1,28 @@
+import { SubtitleData } from "./subtitleData";
+/**
+ * This handles the low-level PGS loading and rendering. This renderer can operate inside the web worker without being
+ * linked to a video element.
+ */
+export declare class Renderer {
+    private readonly canvas;
+    private readonly context;
+    private readonly dirtyArea;
+    constructor(canvas: OffscreenCanvas | HTMLCanvasElement);
+    /**
+     * Renders the given subtitle data to the canvas.
+     * @param subtitleData The pre-compiled subtitle data to render.
+     */
+    draw(subtitleData?: SubtitleData): void;
+    /**
+     * Draws the whole subtitle frame to the given context.
+     * @param subtitleData The subtitle data to draw.
+     * @param dirtyArea If given, it will extend the dirty rect to include the affected subtitle area.
+     */
+    private drawSubtitleData;
+    /**
+     * Draws this subtitle composition to the given context.
+     * @param compositionData The subtitle composition data to draw.
+     * @param dirtyArea If given, it will extend the dirty rect to include the affected subtitle area.
+     */
+    private drawSubtitleCompositionData;
+}
diff --git a/dist/subtitleData.d.ts b/dist/subtitleData.d.ts
new file mode 100644
index 0000000..82338e4
--- /dev/null
+++ b/dist/subtitleData.d.ts
@@ -0,0 +1,38 @@
+import { WindowDefinition } from "./pgs/windowDefinitionSegment";
+import { CompositionObject } from "./pgs/presentationCompositionSegment";
+/**
+ * This class contains the compiled subtitle data for a whole frame.
+ */
+export declare class SubtitleData {
+    /**
+     * The total width of the presentation composition (screen).
+     */
+    readonly width: number;
+    /**
+     * The total height of the presentation composition (screen).
+     */
+    readonly height: number;
+    /**
+     * The pre-compiled composition elements.
+     */
+    readonly compositionData: SubtitleCompositionData[];
+    constructor(width: number, height: number, compositionData: SubtitleCompositionData[]);
+}
+/**
+ * This class contains the compiled subtitle data for a single composition.
+ */
+export declare class SubtitleCompositionData {
+    /**
+     * The original composition object of the subtile data.
+     */
+    readonly compositionObject: CompositionObject;
+    /**
+     * The pgs window to draw on (the on-screen position).
+     */
+    readonly window: WindowDefinition;
+    /**
+     * The compiled pixel data of the subtitle.
+     */
+    readonly pixelData: ImageData;
+    constructor(compositionObject: CompositionObject, window: WindowDefinition, pixelData: ImageData);
+}
diff --git a/dist/utils/arrayBinaryReader.d.ts b/dist/utils/arrayBinaryReader.d.ts
new file mode 100644
index 0000000..5a48b4b
--- /dev/null
+++ b/dist/utils/arrayBinaryReader.d.ts
@@ -0,0 +1,14 @@
+import { BinaryReader } from "./binaryReader";
+/**
+ * A binary reader based on a {@link Uint8Array}.
+ */
+export declare class ArrayBinaryReader implements BinaryReader {
+    private readonly array;
+    private $position;
+    constructor(array: Uint8Array);
+    get position(): number;
+    get length(): number;
+    get eof(): boolean;
+    readByte(): number;
+    readBytes(count: number): Uint8Array;
+}
diff --git a/dist/utils/asyncBinaryReader.d.ts b/dist/utils/asyncBinaryReader.d.ts
new file mode 100644
index 0000000..c2fb516
--- /dev/null
+++ b/dist/utils/asyncBinaryReader.d.ts
@@ -0,0 +1,10 @@
+import { BinaryReader } from "./binaryReader";
+export interface AsyncBinaryReader extends BinaryReader {
+    /**
+     * Ensures that the given number of bytes is available to read synchronously.
+     * This will wait until the data is ready to read.
+     * @param count The number of bytes requested.
+     * @return Returns if the requested number of bytes could be loaded.
+     */
+    requestData(count: number): Promise<boolean>;
+}
diff --git a/dist/utils/bigEndianBinaryReader.d.ts b/dist/utils/bigEndianBinaryReader.d.ts
new file mode 100644
index 0000000..851da92
--- /dev/null
+++ b/dist/utils/bigEndianBinaryReader.d.ts
@@ -0,0 +1,16 @@
+import { BinaryReader } from "./binaryReader";
+export declare class BigEndianBinaryReader {
+    /**
+     * The base binary reader.
+     */
+    readonly baseReader: BinaryReader;
+    constructor(buffer: BinaryReader | Uint8Array);
+    get position(): number;
+    get length(): number;
+    get eof(): boolean;
+    readUInt8(): number;
+    readUInt16(): number;
+    readUInt24(): number;
+    readUInt32(): number;
+    readBytes(count: number): Uint8Array;
+}
diff --git a/dist/utils/binaryReader.d.ts b/dist/utils/binaryReader.d.ts
new file mode 100644
index 0000000..1edbd7d
--- /dev/null
+++ b/dist/utils/binaryReader.d.ts
@@ -0,0 +1,23 @@
+export interface BinaryReader {
+    /**
+     * Gets the current position in the binary buffer.
+     */
+    get position(): number;
+    /**
+     * Gets the length of the binary buffer.
+     */
+    get length(): number;
+    /**
+     * Gets if the binary reader has reached the end of the data.
+     */
+    get eof(): boolean;
+    /**
+     * Reads a single byte from this buffer.
+     */
+    readByte(): number;
+    /**
+     * Reads the given number of bytes from the buffer.
+     * @param count The number of bytes to read.
+     */
+    readBytes(count: number): Uint8Array;
+}
diff --git a/dist/utils/combinedBinaryReader.d.ts b/dist/utils/combinedBinaryReader.d.ts
new file mode 100644
index 0000000..86762de
--- /dev/null
+++ b/dist/utils/combinedBinaryReader.d.ts
@@ -0,0 +1,21 @@
+import { BinaryReader } from "./binaryReader";
+/**
+ * A binary reader that combines multiple binary readers in one data stream.
+ */
+export declare class CombinedBinaryReader implements BinaryReader {
+    private readonly subReaders;
+    private $length;
+    private $position;
+    private subReaderIndex;
+    constructor(subReaders: BinaryReader[] | Uint8Array[]);
+    /**
+     * Adding another sub-reader to the collection.
+     * @param subReader The new sub-reader to add.
+     */
+    push(subReader: BinaryReader | Uint8Array): void;
+    get position(): number;
+    get length(): number;
+    get eof(): boolean;
+    readByte(): number;
+    readBytes(count: number): Uint8Array;
+}
diff --git a/dist/utils/rect.d.ts b/dist/utils/rect.d.ts
new file mode 100644
index 0000000..ef909b5
--- /dev/null
+++ b/dist/utils/rect.d.ts
@@ -0,0 +1,45 @@
+/**
+ * A simple rectangular class.
+ */
+export declare class Rect {
+    /**
+     * Gets if the rect is still empty and doesn't contain any area.
+     */
+    empty: boolean;
+    /**
+     * Gets the x coordinate of the rectangular area if not empty.
+     */
+    x: number;
+    /**
+     * Gets the y coordinate of the rectangular area if not empty.
+     */
+    y: number;
+    /**
+     * Gets the width of the rectangular area if not empty.
+     */
+    width: number;
+    /**
+     * Gets the height of the rectangular area if not empty.
+     */
+    height: number;
+    /**
+     * Clears the rectangular.
+     */
+    reset(): void;
+    /**
+     * Grows this rectangular area to include the given area.
+     * @param x The x coordinate of the new area.
+     * @param y The y coordinate of the new area.
+     * @param width The width of the new area. Negative values are not supported.
+     * @param height The height of the new area. Negative values are not supported.
+     */
+    set(x: number, y: number, width?: number, height?: number): void;
+    /**
+     * Grows this rectangular area to include the given area.
+     * @param x The x coordinate of the new area to include.
+     * @param y The y coordinate of the new area to include.
+     * @param width The width of the new area to include. Negative values are not supported.
+     * @param height The height of the new area to include. Negative values are not supported.
+     */
+    union(x: number, y: number, width?: number, height?: number): void;
+}
diff --git a/dist/utils/runLengthEncoding.d.ts b/dist/utils/runLengthEncoding.d.ts
new file mode 100644
index 0000000..1aa9a7a
--- /dev/null
+++ b/dist/utils/runLengthEncoding.d.ts
@@ -0,0 +1,14 @@
+import { BinaryReader } from "./binaryReader";
+/**
+ * Handles run length encoded images.
+ */
+export declare abstract class RunLengthEncoding {
+    /**
+     * Decodes the run length encoded image.
+     * @param reader The run length encoded binary data reader or buffer.
+     * @param source The source maps the index value to the raw output pixel data.
+     * @param target The pixel data is written to the output.
+     * @return Returns the number of decoded pixels.
+     */
+    static decode(reader: BinaryReader | Uint8Array, source: number[] | Uint8Array | Uint8ClampedArray | Uint16Array | Uint32Array, target: number[] | Uint8Array | Uint8ClampedArray | Uint16Array | Uint32Array): number;
+}
diff --git a/dist/utils/streamBinaryReader.d.ts b/dist/utils/streamBinaryReader.d.ts
new file mode 100644
index 0000000..5ddc791
--- /dev/null
+++ b/dist/utils/streamBinaryReader.d.ts
@@ -0,0 +1,16 @@
+import { AsyncBinaryReader } from "./asyncBinaryReader";
+/**
+ * A binary reader based on a readable stream. This can read a partially loaded stream - for example a download.
+ */
+export declare class StreamBinaryReader implements AsyncBinaryReader {
+    private readonly stream;
+    private readonly reader;
+    private $eof;
+    constructor(stream: ReadableStreamDefaultReader<Uint8Array>);
+    get position(): number;
+    get length(): number;
+    get eof(): boolean;
+    readByte(): number;
+    readBytes(count: number): Uint8Array;
+    requestData(count?: number): Promise<boolean>;
+}
diff --git a/dist/worker.d.ts b/dist/worker.d.ts
new file mode 100644
index 0000000..866d261
--- /dev/null
+++ b/dist/worker.d.ts
@@ -0,0 +1,3 @@
+import "core-js/stable/array/find";
+import "core-js/stable/promise";
+import "whatwg-fetch";