diff --git a/.eslintrc.js b/.eslintrc.js
index c3ed7c56..365ef212 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -1,6 +1,7 @@
 module.exports = {
 	"parserOptions": {
-		"ecmaVersion": 5
+		"ecmaVersion": 2020,
+		"sourceType": "module"
 	},
 	"env": {
 		"browser": true,
diff --git a/Gruntfile.js b/Gruntfile.js
deleted file mode 100644
index 93b1256f..00000000
--- a/Gruntfile.js
+++ /dev/null
@@ -1,27 +0,0 @@
-module.exports = function(grunt) {
-	grunt.initConfig({
-		uglify: {
-			options: {
-				compress: {
-					global_defs: {
-						'PAPA_BROWSER_CONTEXT': true
-					},
-					dead_code: true
-				},
-				output: {
-					comments: 'some',
-				},
-			},
-			min: {
-				files: {
-					'papaparse.min.js': ['papaparse.js']
-				},
-			},
-		},
-	});
-
-	grunt.loadNpmTasks('grunt-contrib-uglify');
-
-	grunt.registerTask('build', ['uglify']);
-	grunt.registerTask('default', ['uglify']);
-};
diff --git a/package.json b/package.json
index af0afbfe..d835b96d 100644
--- a/package.json
+++ b/package.json
@@ -34,21 +34,26 @@
 		"url": "https://twitter.com/mholt6"
 	},
 	"license": "MIT",
-	"main": "papaparse.js",
-	"browser": "papaparse.min.js",
+	"main": "./papaparse.js",
+	"browser": "./papaparse.min.js",
+	"exports": {
+		"import": "./papaparse.mjs",
+		"require": "./papaparse.js"
+	},
 	"devDependencies": {
 		"chai": "^4.2.0",
-		"connect": "^3.3.3",
-		"eslint": "^4.19.1",
-		"grunt": "^1.0.2",
-		"grunt-contrib-uglify": "^3.3.0",
-		"mocha": "^5.2.0",
-		"mocha-headless-chrome": "^2.0.1",
+		"connect": "^3.7.0",
+		"eslint": "^7.28.0",
+		"mocha": "^9.0.0",
+		"mocha-headless-chrome": "^3.1.0",
 		"open": "7.0.0",
-		"serve-static": "^1.7.1"
+		"rollup": "^2.51.1",
+		"rollup-plugin-terser": "^7.0.2",
+		"serve-static": "^1.14.1"
 	},
 	"scripts": {
-		"lint": "eslint --no-ignore papaparse.js Gruntfile.js .eslintrc.js 'tests/**/*.js'",
+		"build": "rollup -c rollup.config.mjs",
+		"lint": "eslint --no-ignore papaparse.mjs .eslintrc.js 'tests/**/*.js'",
 		"test-browser": "node tests/test.js",
 		"test-mocha-headless-chrome": "node tests/test.js --mocha-headless-chrome",
 		"test-node": "mocha tests/node-tests.js tests/test-cases.js",
diff --git a/papaparse.js b/papaparse.js
old mode 100755
new mode 100644
index 090c6634..e7ee20c1
--- a/papaparse.js
+++ b/papaparse.js
@@ -1,36 +1,15 @@
-/* @license
-Papa Parse
-v5.3.1
-https://github.com/mholt/PapaParse
-License: MIT
-*/
-
-(function(root, factory)
-{
-	/* globals define */
-	if (typeof define === 'function' && define.amd)
-	{
-		// AMD. Register as an anonymous module.
-		define([], factory);
-	}
-	else if (typeof module === 'object' && typeof exports !== 'undefined')
-	{
-		// Node. Does not work with strict CommonJS, but
-		// only CommonJS-like environments that support module.exports,
-		// like Node.
-		module.exports = factory();
-	}
-	else
-	{
-		// Browser globals (root is window)
-		root.Papa = factory();
-	}
-	// in strict mode we cannot access arguments.callee, so we need a named reference to
-	// stringify the factory method for the blob worker
-	// eslint-disable-next-line func-name
-}(this, function moduleFactory()
-{
-	'use strict';
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
+	typeof define === 'function' && define.amd ? define(['exports'], factory) :
+	(global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.Papa = {}));
+}(this, (function (exports) { 'use strict';
+
+	/* @license
+	Papa Parse
+	v5.3.1
+	https://github.com/mholt/PapaParse
+	License: MIT
+	*/
 
 	var global = (function() {
 		// alternative method, similar to `Function('return this')()`
@@ -45,44 +24,45 @@ License: MIT
 		return {};
 	})();
 
-
-	function getWorkerBlob() {
-		var URL = global.URL || global.webkitURL || null;
-		var code = moduleFactory.toString();
-		return Papa.BLOB_URL || (Papa.BLOB_URL = URL.createObjectURL(new Blob(['(', code, ')();'], {type: 'text/javascript'})));
-	}
-
-	var IS_WORKER = !global.document && !!global.postMessage,
-		IS_PAPA_WORKER = IS_WORKER && /blob:/i.test((global.location || {}).protocol);
 	var workers = {}, workerIdCounter = 0;
+	var PAPA_WORKER_NAME = 'papa-worker';
+	var WORKER_ID;
+	var SCRIPT_URL = global && global.document && global.document.currentScript && global.document.currentScript.src;
+	var IS_WORKER = !global.document && !!global.postMessage,
+		IS_PAPA_WORKER = IS_WORKER && global.name === PAPA_WORKER_NAME;
 
-	var Papa = {};
-
-	Papa.parse = CsvToJson;
-	Papa.unparse = JsonToCsv;
+	var parse = CsvToJson;
+	var unparse = JsonToCsv;
 
-	Papa.RECORD_SEP = String.fromCharCode(30);
-	Papa.UNIT_SEP = String.fromCharCode(31);
-	Papa.BYTE_ORDER_MARK = '\ufeff';
-	Papa.BAD_DELIMITERS = ['\r', '\n', '"', Papa.BYTE_ORDER_MARK];
-	Papa.WORKERS_SUPPORTED = !IS_WORKER && !!global.Worker;
-	Papa.NODE_STREAM_INPUT = 1;
+	var RECORD_SEP = String.fromCharCode(30);
+	var UNIT_SEP = String.fromCharCode(31);
+	var BYTE_ORDER_MARK = '\ufeff';
+	var BAD_DELIMITERS = ['\r', '\n', '"', BYTE_ORDER_MARK];
+	var WORKERS_SUPPORTED = !IS_WORKER && !!global.Worker && SCRIPT_URL;
+	var NODE_STREAM_INPUT = 1;
 
 	// Configurable chunk sizes for local and remote files, respectively
-	Papa.LocalChunkSize = 1024 * 1024 * 10;	// 10 MB
-	Papa.RemoteChunkSize = 1024 * 1024 * 5;	// 5 MB
-	Papa.DefaultDelimiter = ',';			// Used if not specified and detection fails
+	var LocalChunkSize = 1024 * 1024 * 10;	// 10 MB
+	var RemoteChunkSize = 1024 * 1024 * 5;	// 5 MB
+	var DefaultDelimiter = ',';  			// Used if not specified and detection fails
 
 	// Exposed for testing and development only
-	Papa.Parser = Parser;
-	Papa.ParserHandle = ParserHandle;
-	Papa.NetworkStreamer = NetworkStreamer;
-	Papa.FileStreamer = FileStreamer;
-	Papa.StringStreamer = StringStreamer;
-	Papa.ReadableStreamStreamer = ReadableStreamStreamer;
-	if (typeof PAPA_BROWSER_CONTEXT === 'undefined') {
-		Papa.DuplexStreamStreamer = DuplexStreamStreamer;
-	}
+	/** @private */
+	var Parser = _Parser;
+	/** @private */
+	var ParserHandle = _ParserHandle;
+	/** @private */
+	var NetworkStreamer = _NetworkStreamer;
+	/** @private */
+	var FileStreamer = _FileStreamer;
+	/** @private */
+	var StringStreamer = _StringStreamer;
+	/** @private */
+	var ReadableStreamStreamer = _ReadableStreamStreamer;
+	/** @private */
+	var DuplexStreamStreamer = typeof PAPA_BROWSER_CONTEXT === 'undefined'
+		? _DuplexStreamStreamer
+		: undefined;
 
 	if (global.jQuery)
 	{
@@ -161,7 +141,7 @@ License: MIT
 					fileComplete();
 				};
 
-				Papa.parse(f.file, f.instanceConfig);
+				parse(f.file, f.instanceConfig);
 			}
 
 			function error(name, file, elem, reason)
@@ -200,7 +180,7 @@ License: MIT
 
 		_config.transform = isFunction(_config.transform) ? _config.transform : false;
 
-		if (_config.worker && Papa.WORKERS_SUPPORTED)
+		if (_config.worker && WORKERS_SUPPORTED)
 		{
 			var w = newWorker();
 
@@ -225,26 +205,26 @@ License: MIT
 		}
 
 		var streamer = null;
-		if (_input === Papa.NODE_STREAM_INPUT && typeof PAPA_BROWSER_CONTEXT === 'undefined')
+		if (_input === NODE_STREAM_INPUT && typeof PAPA_BROWSER_CONTEXT === 'undefined')
 		{
 			// create a node Duplex stream for use
 			// with .pipe
-			streamer = new DuplexStreamStreamer(_config);
+			streamer = new _DuplexStreamStreamer(_config);
 			return streamer.getStream();
 		}
 		else if (typeof _input === 'string')
 		{
 			if (_config.download)
-				streamer = new NetworkStreamer(_config);
+				streamer = new _NetworkStreamer(_config);
 			else
-				streamer = new StringStreamer(_config);
+				streamer = new _StringStreamer(_config);
 		}
 		else if (_input.readable === true && isFunction(_input.read) && isFunction(_input.on))
 		{
-			streamer = new ReadableStreamStreamer(_config);
+			streamer = new _ReadableStreamStreamer(_config);
 		}
 		else if ((global.File && _input instanceof File) || _input instanceof Object)	// ...Safari. (see issue #106)
-			streamer = new FileStreamer(_config);
+			streamer = new _FileStreamer(_config);
 
 		return streamer.stream(_input);
 	}
@@ -333,7 +313,7 @@ License: MIT
 				return;
 
 			if (typeof _config.delimiter === 'string'
-                && !Papa.BAD_DELIMITERS.filter(function(value) { return _config.delimiter.indexOf(value) !== -1; }).length)
+				&& !BAD_DELIMITERS.filter(function(value) { return _config.delimiter.indexOf(value) !== -1; }).length)
 			{
 				_delimiter = _config.delimiter;
 			}
@@ -453,7 +433,7 @@ License: MIT
 			var needsQuotes = (typeof _quotes === 'boolean' && _quotes)
 							|| (typeof _quotes === 'function' && _quotes(str, col))
 							|| (Array.isArray(_quotes) && _quotes[col])
-							|| hasAny(escapedQuoteStr, Papa.BAD_DELIMITERS)
+							|| hasAny(escapedQuoteStr, BAD_DELIMITERS)
 							|| escapedQuoteStr.indexOf(_delimiter) > -1
 							|| escapedQuoteStr.charAt(0) === ' '
 							|| escapedQuoteStr.charAt(escapedQuoteStr.length - 1) === ' ';
@@ -531,7 +511,7 @@ License: MIT
 			{
 				global.postMessage({
 					results: results,
-					workerId: Papa.WORKER_ID,
+					workerId: WORKER_ID,
 					finished: finishedIncludingPreview
 				});
 			}
@@ -570,7 +550,7 @@ License: MIT
 			else if (IS_PAPA_WORKER && this._config.error)
 			{
 				global.postMessage({
-					workerId: Papa.WORKER_ID,
+					workerId: WORKER_ID,
 					error: error,
 					finished: false
 				});
@@ -584,18 +564,18 @@ License: MIT
 			configCopy.chunkSize = parseInt(configCopy.chunkSize);	// parseInt VERY important so we don't concatenate strings!
 			if (!config.step && !config.chunk)
 				configCopy.chunkSize = null;  // disable Range header if not streaming; bad values break IIS - see issue #196
-			this._handle = new ParserHandle(configCopy);
+			this._handle = new _ParserHandle(configCopy);
 			this._handle.streamer = this;
 			this._config = configCopy;	// persist the copy to the caller
 		}
 	}
 
 
-	function NetworkStreamer(config)
+	function _NetworkStreamer(config)
 	{
 		config = config || {};
 		if (!config.chunkSize)
-			config.chunkSize = Papa.RemoteChunkSize;
+			config.chunkSize = RemoteChunkSize;
 		ChunkStreamer.call(this, config);
 
 		var xhr;
@@ -704,15 +684,15 @@ License: MIT
 			return parseInt(contentRange.substring(contentRange.lastIndexOf('/') + 1));
 		}
 	}
-	NetworkStreamer.prototype = Object.create(ChunkStreamer.prototype);
-	NetworkStreamer.prototype.constructor = NetworkStreamer;
+	_NetworkStreamer.prototype = Object.create(ChunkStreamer.prototype);
+	_NetworkStreamer.prototype.constructor = _NetworkStreamer;
 
 
-	function FileStreamer(config)
+	function _FileStreamer(config)
 	{
 		config = config || {};
 		if (!config.chunkSize)
-			config.chunkSize = Papa.LocalChunkSize;
+			config.chunkSize = LocalChunkSize;
 		ChunkStreamer.call(this, config);
 
 		var reader, slice;
@@ -771,11 +751,11 @@ License: MIT
 		};
 
 	}
-	FileStreamer.prototype = Object.create(ChunkStreamer.prototype);
-	FileStreamer.prototype.constructor = FileStreamer;
+	_FileStreamer.prototype = Object.create(ChunkStreamer.prototype);
+	_FileStreamer.prototype.constructor = _FileStreamer;
 
 
-	function StringStreamer(config)
+	function _StringStreamer(config)
 	{
 		config = config || {};
 		ChunkStreamer.call(this, config);
@@ -802,11 +782,11 @@ License: MIT
 			return this.parseChunk(chunk);
 		};
 	}
-	StringStreamer.prototype = Object.create(StringStreamer.prototype);
-	StringStreamer.prototype.constructor = StringStreamer;
+	_StringStreamer.prototype = Object.create(_StringStreamer.prototype);
+	_StringStreamer.prototype.constructor = _StringStreamer;
 
 
-	function ReadableStreamStreamer(config)
+	function _ReadableStreamStreamer(config)
 	{
 		config = config || {};
 
@@ -896,11 +876,11 @@ License: MIT
 			this._input.removeListener('error', this._streamError);
 		}, this);
 	}
-	ReadableStreamStreamer.prototype = Object.create(ChunkStreamer.prototype);
-	ReadableStreamStreamer.prototype.constructor = ReadableStreamStreamer;
+	_ReadableStreamStreamer.prototype = Object.create(ChunkStreamer.prototype);
+	_ReadableStreamStreamer.prototype.constructor = _ReadableStreamStreamer;
 
 
-	function DuplexStreamStreamer(_config) {
+	function _DuplexStreamStreamer(_config) {
 		var Duplex = require('stream').Duplex;
 		var config = copy(_config);
 		var parseOnWrite = true;
@@ -996,13 +976,13 @@ License: MIT
 		stream.once('finish', bindFunction(this._onWriteComplete, this));
 	}
 	if (typeof PAPA_BROWSER_CONTEXT === 'undefined') {
-		DuplexStreamStreamer.prototype = Object.create(ChunkStreamer.prototype);
-		DuplexStreamStreamer.prototype.constructor = DuplexStreamStreamer;
+		_DuplexStreamStreamer.prototype = Object.create(ChunkStreamer.prototype);
+		_DuplexStreamStreamer.prototype.constructor = _DuplexStreamStreamer;
 	}
 
 
 	// Use one ParserHandle per entire CSV file or string
-	function ParserHandle(_config)
+	function _ParserHandle(_config)
 	{
 		// One goal is to minimize the use of regular expressions...
 		var MAX_FLOAT = Math.pow(2, 53);
@@ -1072,7 +1052,7 @@ License: MIT
 				else
 				{
 					_delimiterError = true;	// add error after parsing (otherwise it would be overwritten)
-					_config.delimiter = Papa.DefaultDelimiter;
+					_config.delimiter = DefaultDelimiter;
 				}
 				_results.meta.delimiter = _config.delimiter;
 			}
@@ -1087,7 +1067,7 @@ License: MIT
 				parserConfig.preview++;	// to compensate for header row
 
 			_input = input;
-			_parser = new Parser(parserConfig);
+			_parser = new _Parser(parserConfig);
 			_results = _parser.parse(_input, baseIndex, ignoreLastRow);
 			processResults();
 			return _paused ? { meta: { paused: true } } : (_results || { meta: { paused: false } });
@@ -1153,7 +1133,7 @@ License: MIT
 		{
 			if (_results && _delimiterError)
 			{
-				addError('Delimiter', 'UndetectableDelimiter', 'Unable to auto-detect delimiting character; defaulted to \'' + Papa.DefaultDelimiter + '\'');
+				addError('Delimiter', 'UndetectableDelimiter', 'Unable to auto-detect delimiting character; defaulted to \'' + DefaultDelimiter + '\'');
 				_delimiterError = false;
 			}
 
@@ -1290,14 +1270,14 @@ License: MIT
 		function guessDelimiter(input, newline, skipEmptyLines, comments, delimitersToGuess) {
 			var bestDelim, bestDelta, fieldCountPrevRow, maxFieldCount;
 
-			delimitersToGuess = delimitersToGuess || [',', '\t', '|', ';', Papa.RECORD_SEP, Papa.UNIT_SEP];
+			delimitersToGuess = delimitersToGuess || [',', '\t', '|', ';', RECORD_SEP, UNIT_SEP];
 
 			for (var i = 0; i < delimitersToGuess.length; i++) {
 				var delim = delimitersToGuess[i];
 				var delta = 0, avgFieldCount = 0, emptyLinesCount = 0;
 				fieldCountPrevRow = undefined;
 
-				var preview = new Parser({
+				var preview = new _Parser({
 					comments: comments,
 					delimiter: delim,
 					newline: newline,
@@ -1388,7 +1368,7 @@ License: MIT
 	}
 
 	/** The core parser implements speedy and correct CSV parsing */
-	function Parser(config)
+	function _Parser(config)
 	{
 		// Unpack the config object
 		config = config || {};
@@ -1412,7 +1392,7 @@ License: MIT
 
 		// Delimiter must be valid
 		if (typeof delim !== 'string'
-			|| Papa.BAD_DELIMITERS.indexOf(delim) > -1)
+			|| BAD_DELIMITERS.indexOf(delim) > -1)
 			delim = ',';
 
 		// Comment character must be valid
@@ -1421,7 +1401,7 @@ License: MIT
 		else if (comments === true)
 			comments = '#';
 		else if (typeof comments !== 'string'
-			|| Papa.BAD_DELIMITERS.indexOf(comments) > -1)
+			|| BAD_DELIMITERS.indexOf(comments) > -1)
 			comments = false;
 
 		// Newline must be valid: \r, \n, or \r\n
@@ -1665,9 +1645,9 @@ License: MIT
 			}
 
 			/**
-             * checks if there are extra spaces after closing quote and given index without any text
-             * if Yes, returns the number of spaces
-             */
+			 * checks if there are extra spaces after closing quote and given index without any text
+			 * if Yes, returns the number of spaces
+			 */
 			function extraSpaces(index) {
 				var spaceLength = 0;
 				if (index !== -1) {
@@ -1752,11 +1732,11 @@ License: MIT
 
 	function newWorker()
 	{
-		if (!Papa.WORKERS_SUPPORTED)
+		if (!WORKERS_SUPPORTED)
 			return false;
 
-		var workerUrl = getWorkerBlob();
-		var w = new global.Worker(workerUrl);
+		var workerUrl = SCRIPT_URL;
+		var w = new global.Worker(workerUrl, { name: PAPA_WORKER_NAME, type: true ? undefined : 'module' });
 		w.onmessage = mainThreadReceivedMessage;
 		w.id = workerIdCounter++;
 		workers[w.id] = w;
@@ -1827,23 +1807,23 @@ License: MIT
 	{
 		var msg = e.data;
 
-		if (typeof Papa.WORKER_ID === 'undefined' && msg)
-			Papa.WORKER_ID = msg.workerId;
+		if (typeof WORKER_ID === 'undefined' && msg)
+			WORKER_ID = msg.workerId;
 
 		if (typeof msg.input === 'string')
 		{
 			global.postMessage({
-				workerId: Papa.WORKER_ID,
-				results: Papa.parse(msg.input, msg.config),
+				workerId: WORKER_ID,
+				results: parse(msg.input, msg.config),
 				finished: true
 			});
 		}
 		else if ((global.File && msg.input instanceof File) || msg.input instanceof Object)	// thank you, Safari (see issue #106)
 		{
-			var results = Papa.parse(msg.input, msg.config);
+			var results = parse(msg.input, msg.config);
 			if (results)
 				global.postMessage({
-					workerId: Papa.WORKER_ID,
+					workerId: WORKER_ID,
 					results: results,
 					finished: true
 				});
@@ -1871,5 +1851,25 @@ License: MIT
 		return typeof func === 'function';
 	}
 
-	return Papa;
-}));
+	exports.BAD_DELIMITERS = BAD_DELIMITERS;
+	exports.BYTE_ORDER_MARK = BYTE_ORDER_MARK;
+	exports.DefaultDelimiter = DefaultDelimiter;
+	exports.DuplexStreamStreamer = DuplexStreamStreamer;
+	exports.FileStreamer = FileStreamer;
+	exports.LocalChunkSize = LocalChunkSize;
+	exports.NODE_STREAM_INPUT = NODE_STREAM_INPUT;
+	exports.NetworkStreamer = NetworkStreamer;
+	exports.Parser = Parser;
+	exports.ParserHandle = ParserHandle;
+	exports.RECORD_SEP = RECORD_SEP;
+	exports.ReadableStreamStreamer = ReadableStreamStreamer;
+	exports.RemoteChunkSize = RemoteChunkSize;
+	exports.StringStreamer = StringStreamer;
+	exports.UNIT_SEP = UNIT_SEP;
+	exports.WORKERS_SUPPORTED = WORKERS_SUPPORTED;
+	exports.parse = parse;
+	exports.unparse = unparse;
+
+	Object.defineProperty(exports, '__esModule', { value: true });
+
+})));
diff --git a/papaparse.min.js b/papaparse.min.js
index 96aced42..d752b56c 100644
--- a/papaparse.min.js
+++ b/papaparse.min.js
@@ -1,7 +1,7 @@
+!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?t(exports):"function"==typeof define&&define.amd?define(["exports"],t):t((e="undefined"!=typeof globalThis?globalThis:e||self).Papa={})}(this,(function(e){"use strict";
 /* @license
-Papa Parse
-v5.3.1
-https://github.com/mholt/PapaParse
-License: MIT
-*/
-!function(e,t){"function"==typeof define&&define.amd?define([],t):"object"==typeof module&&"undefined"!=typeof exports?module.exports=t():e.Papa=t()}(this,function s(){"use strict";var f="undefined"!=typeof self?self:"undefined"!=typeof window?window:void 0!==f?f:{};var n=!f.document&&!!f.postMessage,o=n&&/blob:/i.test((f.location||{}).protocol),a={},h=0,b={parse:function(e,t){var i=(t=t||{}).dynamicTyping||!1;M(i)&&(t.dynamicTypingFunction=i,i={});if(t.dynamicTyping=i,t.transform=!!M(t.transform)&&t.transform,t.worker&&b.WORKERS_SUPPORTED){var r=function(){if(!b.WORKERS_SUPPORTED)return!1;var e=(i=f.URL||f.webkitURL||null,r=s.toString(),b.BLOB_URL||(b.BLOB_URL=i.createObjectURL(new Blob(["(",r,")();"],{type:"text/javascript"})))),t=new f.Worker(e);var i,r;return t.onmessage=_,t.id=h++,a[t.id]=t}();return r.userStep=t.step,r.userChunk=t.chunk,r.userComplete=t.complete,r.userError=t.error,t.step=M(t.step),t.chunk=M(t.chunk),t.complete=M(t.complete),t.error=M(t.error),delete 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\ No newline at end of file
+	Papa Parse
+	v5.3.1
+	https://github.com/mholt/PapaParse
+	License: MIT
+	*/var t,i="undefined"!=typeof self?self:"undefined"!=typeof window?window:void 0!==i?i:{},r={},n=0,s="papa-worker",a=i&&i.document&&i.document.currentScript&&i.document.currentScript.src,o=!i.document&&!!i.postMessage,h=o&&i.name===s,u=function(e,t){var o=(t=t||{}).dynamicTyping||!1;q(o)&&(t.dynamicTypingFunction=o,o={});if(t.dynamicTyping=o,t.transform=!!q(t.transform)&&t.transform,t.worker&&p){var h=function(){if(!p)return!1;var e=a,t=new i.Worker(e,{name:s,type:void 0});return t.onmessage=L,t.id=n++,r[t.id]=t,t}();return h.userStep=t.step,h.userChunk=t.chunk,h.userComplete=t.complete,h.userError=t.error,t.step=q(t.step),t.chunk=q(t.chunk),t.complete=q(t.complete),t.error=q(t.error),delete t.worker,void h.postMessage({input:e,config:t,workerId:h.id})}var u=null;if(1===e&&"undefined"==typeof PAPA_BROWSER_CONTEXT)return(u=new A(t)).getStream();"string"==typeof e?u=t.download?new x(t):new R(t):!0===e.readable&&q(e.read)&&q(e.on)?u=new T(t):(i.File&&e instanceof File||e instanceof 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z();if(a&&y.length>=a)return z(!0)}else for(O=u,u++;;){if(-1===(O=e.indexOf(t,O+1)))return l||v.push({type:"Quotes",code:"MissingQuotes",message:"Quoted field unterminated",row:y.length,index:u}),j();if(O===c-1)return j(e.substring(u,O).replace(x,t));if(t!==h||e[O+1]!==h){if(t===h||0===O||e[O-1]!==h){-1!==E&&E<O+1&&(E=e.indexOf(i,O+1)),-1!==S&&S<O+1&&(S=e.indexOf(r,O+1));var R=F(-1===S?E:Math.min(E,S));if(e[O+1+R]===i){k.push(e.substring(u,O).replace(x,t)),u=O+1+R+p,e[O+1+R+p]!==t&&(O=e.indexOf(t,u)),E=e.indexOf(i,u),S=e.indexOf(r,u);break}var T=F(S);if(e.substring(O+1+T,O+1+T+g)===r){if(k.push(e.substring(u,O).replace(x,t)),L(O+1+T+g),E=e.indexOf(i,u),O=e.indexOf(t,u),_&&(D(),f))return z();if(a&&y.length>=a)return z(!0);break}v.push({type:"Quotes",code:"InvalidQuotes",message:"Trailing quote on quoted field is malformed",row:y.length,index:u}),O++}}else O++}return j();function A(e){y.push(e),b=u}function F(t){var i=0;if(-1!==t){var r=e.substring(O+1,t);r&&""===r.trim()&&(i=r.length)}return i}function j(t){return l||(void 0===t&&(t=e.substring(u)),k.push(t),u=c,A(k),_&&D()),z()}function L(t){u=t,A(k),k=[],S=e.indexOf(r,u)}function z(e){return{data:y,errors:v,meta:{delimiter:i,linebreak:r,aborted:f,truncated:!!e,cursor:b+(d||0)}}}function D(){s(z()),y=[],v=[]}},this.abort=function(){f=!0},this.getCharIndex=function(){return u}}function L(e){var t=e.data,i=r[t.workerId],n=!1;if(t.error)i.userError(t.error,t.file);else if(t.results&&t.results.data){var s={abort:function(){n=!0,z(t.workerId,{data:[],errors:[],meta:{aborted:!0}})},pause:D,resume:D};if(q(i.userStep)){for(var a=0;a<t.results.data.length&&(i.userStep({data:t.results.data[a],errors:t.results.errors,meta:t.results.meta},s),!n);a++);delete t.results}else q(i.userChunk)&&(i.userChunk(t.results,s,t.file),delete t.results)}t.finished&&!n&&z(t.workerId,t.results)}function z(e,t){var i=r[e];q(i.userComplete)&&i.userComplete(t),i.terminate(),delete r[e]}function D(){throw new Error("Not implemented.")}function M(e){if("object"!=typeof e||null===e)return e;var t=Array.isArray(e)?[]:{};for(var i in e)t[i]=M(e[i]);return t}function P(e,t){return function(){e.apply(t,arguments)}}function q(e){return"function"==typeof e}h&&(i.onmessage=function(e){var r=e.data;void 0===t&&r&&(t=r.workerId);if("string"==typeof r.input)i.postMessage({workerId:t,results:u(r.input,r.config),finished:!0});else if(i.File&&r.input instanceof File||r.input instanceof Object){var n=u(r.input,r.config);n&&i.postMessage({workerId:t,results:n,finished:!0})}}),x.prototype=Object.create(S.prototype),x.prototype.constructor=x,O.prototype=Object.create(S.prototype),O.prototype.constructor=O,R.prototype=Object.create(R.prototype),R.prototype.constructor=R,T.prototype=Object.create(S.prototype),T.prototype.constructor=T,"undefined"==typeof PAPA_BROWSER_CONTEXT&&(A.prototype=Object.create(S.prototype),A.prototype.constructor=A),e.BAD_DELIMITERS=c,e.BYTE_ORDER_MARK="\ufeff",e.DefaultDelimiter=",",e.DuplexStreamStreamer=w,e.FileStreamer=k,e.LocalChunkSize=g,e.NODE_STREAM_INPUT=1,e.NetworkStreamer=v,e.Parser=_,e.ParserHandle=y,e.RECORD_SEP=d,e.ReadableStreamStreamer=C,e.RemoteChunkSize=m,e.StringStreamer=b,e.UNIT_SEP=l,e.WORKERS_SUPPORTED=p,e.parse=u,e.unparse=f,Object.defineProperty(e,"__esModule",{value:!0})}));
diff --git a/papaparse.mjs b/papaparse.mjs
new file mode 100755
index 00000000..288ff349
--- /dev/null
+++ b/papaparse.mjs
@@ -0,0 +1,1846 @@
+/* @license
+Papa Parse
+v5.3.1
+https://github.com/mholt/PapaParse
+License: MIT
+*/
+
+var global = (function() {
+	// alternative method, similar to `Function('return this')()`
+	// but without using `eval` (which is disabled when
+	// using Content Security Policy).
+
+	if (typeof self !== 'undefined') { return self; }
+	if (typeof window !== 'undefined') { return window; }
+	if (typeof global !== 'undefined') { return global; }
+
+	// When running tests none of the above have been defined
+	return {};
+})();
+
+var workers = {}, workerIdCounter = 0;
+var PAPA_WORKER_NAME = 'papa-worker';
+var WORKER_ID;
+var SCRIPT_URL = import.meta.url;
+var IS_WORKER = !global.document && !!global.postMessage,
+	IS_PAPA_WORKER = IS_WORKER && global.name === PAPA_WORKER_NAME;
+
+export var parse = CsvToJson;
+export var unparse = JsonToCsv;
+
+export var RECORD_SEP = String.fromCharCode(30);
+export var UNIT_SEP = String.fromCharCode(31);
+export var BYTE_ORDER_MARK = '\ufeff';
+export var BAD_DELIMITERS = ['\r', '\n', '"', BYTE_ORDER_MARK];
+export var WORKERS_SUPPORTED = !IS_WORKER && !!global.Worker && SCRIPT_URL;
+export var NODE_STREAM_INPUT = 1;
+
+// Configurable chunk sizes for local and remote files, respectively
+export var LocalChunkSize = 1024 * 1024 * 10;	// 10 MB
+export var RemoteChunkSize = 1024 * 1024 * 5;	// 5 MB
+export var DefaultDelimiter = ',';  			// Used if not specified and detection fails
+
+// Exposed for testing and development only
+/** @private */
+export var Parser = _Parser;
+/** @private */
+export var ParserHandle = _ParserHandle;
+/** @private */
+export var NetworkStreamer = _NetworkStreamer;
+/** @private */
+export var FileStreamer = _FileStreamer;
+/** @private */
+export var StringStreamer = _StringStreamer;
+/** @private */
+export var ReadableStreamStreamer = _ReadableStreamStreamer;
+/** @private */
+export var DuplexStreamStreamer = typeof PAPA_BROWSER_CONTEXT === 'undefined'
+	? _DuplexStreamStreamer
+	: undefined;
+
+if (global.jQuery)
+{
+	var $ = global.jQuery;
+	$.fn.parse = function(options)
+	{
+		var config = options.config || {};
+		var queue = [];
+
+		this.each(function(idx)
+		{
+			var supported = $(this).prop('tagName').toUpperCase() === 'INPUT'
+							&& $(this).attr('type').toLowerCase() === 'file'
+							&& global.FileReader;
+
+			if (!supported || !this.files || this.files.length === 0)
+				return true;	// continue to next input element
+
+			for (var i = 0; i < this.files.length; i++)
+			{
+				queue.push({
+					file: this.files[i],
+					inputElem: this,
+					instanceConfig: $.extend({}, config)
+				});
+			}
+		});
+
+		parseNextFile();	// begin parsing
+		return this;		// maintains chainability
+
+
+		function parseNextFile()
+		{
+			if (queue.length === 0)
+			{
+				if (isFunction(options.complete))
+					options.complete();
+				return;
+			}
+
+			var f = queue[0];
+
+			if (isFunction(options.before))
+			{
+				var returned = options.before(f.file, f.inputElem);
+
+				if (typeof returned === 'object')
+				{
+					if (returned.action === 'abort')
+					{
+						error('AbortError', f.file, f.inputElem, returned.reason);
+						return;	// Aborts all queued files immediately
+					}
+					else if (returned.action === 'skip')
+					{
+						fileComplete();	// parse the next file in the queue, if any
+						return;
+					}
+					else if (typeof returned.config === 'object')
+						f.instanceConfig = $.extend(f.instanceConfig, returned.config);
+				}
+				else if (returned === 'skip')
+				{
+					fileComplete();	// parse the next file in the queue, if any
+					return;
+				}
+			}
+
+			// Wrap up the user's complete callback, if any, so that ours also gets executed
+			var userCompleteFunc = f.instanceConfig.complete;
+			f.instanceConfig.complete = function(results)
+			{
+				if (isFunction(userCompleteFunc))
+					userCompleteFunc(results, f.file, f.inputElem);
+				fileComplete();
+			};
+
+			parse(f.file, f.instanceConfig);
+		}
+
+		function error(name, file, elem, reason)
+		{
+			if (isFunction(options.error))
+				options.error({name: name}, file, elem, reason);
+		}
+
+		function fileComplete()
+		{
+			queue.splice(0, 1);
+			parseNextFile();
+		}
+	};
+}
+
+
+if (IS_PAPA_WORKER)
+{
+	global.onmessage = workerThreadReceivedMessage;
+}
+
+
+
+
+function CsvToJson(_input, _config)
+{
+	_config = _config || {};
+	var dynamicTyping = _config.dynamicTyping || false;
+	if (isFunction(dynamicTyping)) {
+		_config.dynamicTypingFunction = dynamicTyping;
+		// Will be filled on first row call
+		dynamicTyping = {};
+	}
+	_config.dynamicTyping = dynamicTyping;
+
+	_config.transform = isFunction(_config.transform) ? _config.transform : false;
+
+	if (_config.worker && WORKERS_SUPPORTED)
+	{
+		var w = newWorker();
+
+		w.userStep = _config.step;
+		w.userChunk = _config.chunk;
+		w.userComplete = _config.complete;
+		w.userError = _config.error;
+
+		_config.step = isFunction(_config.step);
+		_config.chunk = isFunction(_config.chunk);
+		_config.complete = isFunction(_config.complete);
+		_config.error = isFunction(_config.error);
+		delete _config.worker;	// prevent infinite loop
+
+		w.postMessage({
+			input: _input,
+			config: _config,
+			workerId: w.id
+		});
+
+		return;
+	}
+
+	var streamer = null;
+	if (_input === NODE_STREAM_INPUT && typeof PAPA_BROWSER_CONTEXT === 'undefined')
+	{
+		// create a node Duplex stream for use
+		// with .pipe
+		streamer = new _DuplexStreamStreamer(_config);
+		return streamer.getStream();
+	}
+	else if (typeof _input === 'string')
+	{
+		if (_config.download)
+			streamer = new _NetworkStreamer(_config);
+		else
+			streamer = new _StringStreamer(_config);
+	}
+	else if (_input.readable === true && isFunction(_input.read) && isFunction(_input.on))
+	{
+		streamer = new _ReadableStreamStreamer(_config);
+	}
+	else if ((global.File && _input instanceof File) || _input instanceof Object)	// ...Safari. (see issue #106)
+		streamer = new _FileStreamer(_config);
+
+	return streamer.stream(_input);
+}
+
+
+
+
+
+
+function JsonToCsv(_input, _config)
+{
+	// Default configuration
+
+	/** whether to surround every datum with quotes */
+	var _quotes = false;
+
+	/** whether to write headers */
+	var _writeHeader = true;
+
+	/** delimiting character(s) */
+	var _delimiter = ',';
+
+	/** newline character(s) */
+	var _newline = '\r\n';
+
+	/** quote character */
+	var _quoteChar = '"';
+
+	/** escaped quote character, either "" or <config.escapeChar>" */
+	var _escapedQuote = _quoteChar + _quoteChar;
+
+	/** whether to skip empty lines */
+	var _skipEmptyLines = false;
+
+	/** the columns (keys) we expect when we unparse objects */
+	var _columns = null;
+
+	/** whether to prevent outputting cells that can be parsed as formulae by spreadsheet software (Excel and LibreOffice) */
+	var _escapeFormulae = false;
+
+	unpackConfig();
+
+	var quoteCharRegex = new RegExp(escapeRegExp(_quoteChar), 'g');
+
+	if (typeof _input === 'string')
+		_input = JSON.parse(_input);
+
+	if (Array.isArray(_input))
+	{
+		if (!_input.length || Array.isArray(_input[0]))
+			return serialize(null, _input, _skipEmptyLines);
+		else if (typeof _input[0] === 'object')
+			return serialize(_columns || Object.keys(_input[0]), _input, _skipEmptyLines);
+	}
+	else if (typeof _input === 'object')
+	{
+		if (typeof _input.data === 'string')
+			_input.data = JSON.parse(_input.data);
+
+		if (Array.isArray(_input.data))
+		{
+			if (!_input.fields)
+				_input.fields =  _input.meta && _input.meta.fields;
+
+			if (!_input.fields)
+				_input.fields =  Array.isArray(_input.data[0])
+					? _input.fields
+					: typeof _input.data[0] === 'object'
+						? Object.keys(_input.data[0])
+						: [];
+
+			if (!(Array.isArray(_input.data[0])) && typeof _input.data[0] !== 'object')
+				_input.data = [_input.data];	// handles input like [1,2,3] or ['asdf']
+		}
+
+		return serialize(_input.fields || [], _input.data || [], _skipEmptyLines);
+	}
+
+	// Default (any valid paths should return before this)
+	throw new Error('Unable to serialize unrecognized input');
+
+
+	function unpackConfig()
+	{
+		if (typeof _config !== 'object')
+			return;
+
+		if (typeof _config.delimiter === 'string'
+			&& !BAD_DELIMITERS.filter(function(value) { return _config.delimiter.indexOf(value) !== -1; }).length)
+		{
+			_delimiter = _config.delimiter;
+		}
+
+		if (typeof _config.quotes === 'boolean'
+			|| typeof _config.quotes === 'function'
+			|| Array.isArray(_config.quotes))
+			_quotes = _config.quotes;
+
+		if (typeof _config.skipEmptyLines === 'boolean'
+			|| typeof _config.skipEmptyLines === 'string')
+			_skipEmptyLines = _config.skipEmptyLines;
+
+		if (typeof _config.newline === 'string')
+			_newline = _config.newline;
+
+		if (typeof _config.quoteChar === 'string')
+			_quoteChar = _config.quoteChar;
+
+		if (typeof _config.header === 'boolean')
+			_writeHeader = _config.header;
+
+		if (Array.isArray(_config.columns)) {
+
+			if (_config.columns.length === 0) throw new Error('Option columns is empty');
+
+			_columns = _config.columns;
+		}
+
+		if (_config.escapeChar !== undefined) {
+			_escapedQuote = _config.escapeChar + _quoteChar;
+		}
+
+		if (typeof _config.escapeFormulae === 'boolean')
+			_escapeFormulae = _config.escapeFormulae;
+	}
+
+
+	/** The double for loop that iterates the data and writes out a CSV string including header row */
+	function serialize(fields, data, skipEmptyLines)
+	{
+		var csv = '';
+
+		if (typeof fields === 'string')
+			fields = JSON.parse(fields);
+		if (typeof data === 'string')
+			data = JSON.parse(data);
+
+		var hasHeader = Array.isArray(fields) && fields.length > 0;
+		var dataKeyedByField = !(Array.isArray(data[0]));
+
+		// If there a header row, write it first
+		if (hasHeader && _writeHeader)
+		{
+			for (var i = 0; i < fields.length; i++)
+			{
+				if (i > 0)
+					csv += _delimiter;
+				csv += safe(fields[i], i);
+			}
+			if (data.length > 0)
+				csv += _newline;
+		}
+
+		// Then write out the data
+		for (var row = 0; row < data.length; row++)
+		{
+			var maxCol = hasHeader ? fields.length : data[row].length;
+
+			var emptyLine = false;
+			var nullLine = hasHeader ? Object.keys(data[row]).length === 0 : data[row].length === 0;
+			if (skipEmptyLines && !hasHeader)
+			{
+				emptyLine = skipEmptyLines === 'greedy' ? data[row].join('').trim() === '' : data[row].length === 1 && data[row][0].length === 0;
+			}
+			if (skipEmptyLines === 'greedy' && hasHeader) {
+				var line = [];
+				for (var c = 0; c < maxCol; c++) {
+					var cx = dataKeyedByField ? fields[c] : c;
+					line.push(data[row][cx]);
+				}
+				emptyLine = line.join('').trim() === '';
+			}
+			if (!emptyLine)
+			{
+				for (var col = 0; col < maxCol; col++)
+				{
+					if (col > 0 && !nullLine)
+						csv += _delimiter;
+					var colIdx = hasHeader && dataKeyedByField ? fields[col] : col;
+					csv += safe(data[row][colIdx], col);
+				}
+				if (row < data.length - 1 && (!skipEmptyLines || (maxCol > 0 && !nullLine)))
+				{
+					csv += _newline;
+				}
+			}
+		}
+		return csv;
+	}
+
+	/** Encloses a value around quotes if needed (makes a value safe for CSV insertion) */
+	function safe(str, col)
+	{
+		if (typeof str === 'undefined' || str === null)
+			return '';
+
+		if (str.constructor === Date)
+			return JSON.stringify(str).slice(1, 25);
+
+		if (_escapeFormulae === true && typeof str === "string" && (str.match(/^[=+\-@].*$/) !== null)) {
+			str = "'" + str;
+		}
+
+		var escapedQuoteStr = str.toString().replace(quoteCharRegex, _escapedQuote);
+
+		var needsQuotes = (typeof _quotes === 'boolean' && _quotes)
+						|| (typeof _quotes === 'function' && _quotes(str, col))
+						|| (Array.isArray(_quotes) && _quotes[col])
+						|| hasAny(escapedQuoteStr, BAD_DELIMITERS)
+						|| escapedQuoteStr.indexOf(_delimiter) > -1
+						|| escapedQuoteStr.charAt(0) === ' '
+						|| escapedQuoteStr.charAt(escapedQuoteStr.length - 1) === ' ';
+
+		return needsQuotes ? _quoteChar + escapedQuoteStr + _quoteChar : escapedQuoteStr;
+	}
+
+	function hasAny(str, substrings)
+	{
+		for (var i = 0; i < substrings.length; i++)
+			if (str.indexOf(substrings[i]) > -1)
+				return true;
+		return false;
+	}
+}
+
+/** ChunkStreamer is the base prototype for various streamer implementations. */
+function ChunkStreamer(config)
+{
+	this._handle = null;
+	this._finished = false;
+	this._completed = false;
+	this._halted = false;
+	this._input = null;
+	this._baseIndex = 0;
+	this._partialLine = '';
+	this._rowCount = 0;
+	this._start = 0;
+	this._nextChunk = null;
+	this.isFirstChunk = true;
+	this._completeResults = {
+		data: [],
+		errors: [],
+		meta: {}
+	};
+	replaceConfig.call(this, config);
+
+	this.parseChunk = function(chunk, isFakeChunk)
+	{
+		// First chunk pre-processing
+		if (this.isFirstChunk && isFunction(this._config.beforeFirstChunk))
+		{
+			var modifiedChunk = this._config.beforeFirstChunk(chunk);
+			if (modifiedChunk !== undefined)
+				chunk = modifiedChunk;
+		}
+		this.isFirstChunk = false;
+		this._halted = false;
+
+		// Rejoin the line we likely just split in two by chunking the file
+		var aggregate = this._partialLine + chunk;
+		this._partialLine = '';
+
+		var results = this._handle.parse(aggregate, this._baseIndex, !this._finished);
+
+		if (this._handle.paused() || this._handle.aborted()) {
+			this._halted = true;
+			return;
+		}
+
+		var lastIndex = results.meta.cursor;
+
+		if (!this._finished)
+		{
+			this._partialLine = aggregate.substring(lastIndex - this._baseIndex);
+			this._baseIndex = lastIndex;
+		}
+
+		if (results && results.data)
+			this._rowCount += results.data.length;
+
+		var finishedIncludingPreview = this._finished || (this._config.preview && this._rowCount >= this._config.preview);
+
+		if (IS_PAPA_WORKER)
+		{
+			global.postMessage({
+				results: results,
+				workerId: WORKER_ID,
+				finished: finishedIncludingPreview
+			});
+		}
+		else if (isFunction(this._config.chunk) && !isFakeChunk)
+		{
+			this._config.chunk(results, this._handle);
+			if (this._handle.paused() || this._handle.aborted()) {
+				this._halted = true;
+				return;
+			}
+			results = undefined;
+			this._completeResults = undefined;
+		}
+
+		if (!this._config.step && !this._config.chunk) {
+			this._completeResults.data = this._completeResults.data.concat(results.data);
+			this._completeResults.errors = this._completeResults.errors.concat(results.errors);
+			this._completeResults.meta = results.meta;
+		}
+
+		if (!this._completed && finishedIncludingPreview && isFunction(this._config.complete) && (!results || !results.meta.aborted)) {
+			this._config.complete(this._completeResults, this._input);
+			this._completed = true;
+		}
+
+		if (!finishedIncludingPreview && (!results || !results.meta.paused))
+			this._nextChunk();
+
+		return results;
+	};
+
+	this._sendError = function(error)
+	{
+		if (isFunction(this._config.error))
+			this._config.error(error);
+		else if (IS_PAPA_WORKER && this._config.error)
+		{
+			global.postMessage({
+				workerId: WORKER_ID,
+				error: error,
+				finished: false
+			});
+		}
+	};
+
+	function replaceConfig(config)
+	{
+		// Deep-copy the config so we can edit it
+		var configCopy = copy(config);
+		configCopy.chunkSize = parseInt(configCopy.chunkSize);	// parseInt VERY important so we don't concatenate strings!
+		if (!config.step && !config.chunk)
+			configCopy.chunkSize = null;  // disable Range header if not streaming; bad values break IIS - see issue #196
+		this._handle = new _ParserHandle(configCopy);
+		this._handle.streamer = this;
+		this._config = configCopy;	// persist the copy to the caller
+	}
+}
+
+
+function _NetworkStreamer(config)
+{
+	config = config || {};
+	if (!config.chunkSize)
+		config.chunkSize = RemoteChunkSize;
+	ChunkStreamer.call(this, config);
+
+	var xhr;
+
+	if (IS_WORKER)
+	{
+		this._nextChunk = function()
+		{
+			this._readChunk();
+			this._chunkLoaded();
+		};
+	}
+	else
+	{
+		this._nextChunk = function()
+		{
+			this._readChunk();
+		};
+	}
+
+	this.stream = function(url)
+	{
+		this._input = url;
+		this._nextChunk();	// Starts streaming
+	};
+
+	this._readChunk = function()
+	{
+		if (this._finished)
+		{
+			this._chunkLoaded();
+			return;
+		}
+
+		xhr = new XMLHttpRequest();
+
+		if (this._config.withCredentials)
+		{
+			xhr.withCredentials = this._config.withCredentials;
+		}
+
+		if (!IS_WORKER)
+		{
+			xhr.onload = bindFunction(this._chunkLoaded, this);
+			xhr.onerror = bindFunction(this._chunkError, this);
+		}
+
+		xhr.open(this._config.downloadRequestBody ? 'POST' : 'GET', this._input, !IS_WORKER);
+		// Headers can only be set when once the request state is OPENED
+		if (this._config.downloadRequestHeaders)
+		{
+			var headers = this._config.downloadRequestHeaders;
+
+			for (var headerName in headers)
+			{
+				xhr.setRequestHeader(headerName, headers[headerName]);
+			}
+		}
+
+		if (this._config.chunkSize)
+		{
+			var end = this._start + this._config.chunkSize - 1;	// minus one because byte range is inclusive
+			xhr.setRequestHeader('Range', 'bytes=' + this._start + '-' + end);
+		}
+
+		try {
+			xhr.send(this._config.downloadRequestBody);
+		}
+		catch (err) {
+			this._chunkError(err.message);
+		}
+
+		if (IS_WORKER && xhr.status === 0)
+			this._chunkError();
+	};
+
+	this._chunkLoaded = function()
+	{
+		if (xhr.readyState !== 4)
+			return;
+
+		if (xhr.status < 200 || xhr.status >= 400)
+		{
+			this._chunkError();
+			return;
+		}
+
+		// Use chunckSize as it may be a diference on reponse lentgh due to characters with more than 1 byte
+		this._start += this._config.chunkSize ? this._config.chunkSize : xhr.responseText.length;
+		this._finished = !this._config.chunkSize || this._start >= getFileSize(xhr);
+		this.parseChunk(xhr.responseText);
+	};
+
+	this._chunkError = function(errorMessage)
+	{
+		var errorText = xhr.statusText || errorMessage;
+		this._sendError(new Error(errorText));
+	};
+
+	function getFileSize(xhr)
+	{
+		var contentRange = xhr.getResponseHeader('Content-Range');
+		if (contentRange === null) { // no content range, then finish!
+			return -1;
+		}
+		return parseInt(contentRange.substring(contentRange.lastIndexOf('/') + 1));
+	}
+}
+_NetworkStreamer.prototype = Object.create(ChunkStreamer.prototype);
+_NetworkStreamer.prototype.constructor = _NetworkStreamer;
+
+
+function _FileStreamer(config)
+{
+	config = config || {};
+	if (!config.chunkSize)
+		config.chunkSize = LocalChunkSize;
+	ChunkStreamer.call(this, config);
+
+	var reader, slice;
+
+	// FileReader is better than FileReaderSync (even in worker) - see http://stackoverflow.com/q/24708649/1048862
+	// But Firefox is a pill, too - see issue #76: https://github.com/mholt/PapaParse/issues/76
+	var usingAsyncReader = typeof FileReader !== 'undefined';	// Safari doesn't consider it a function - see issue #105
+
+	this.stream = function(file)
+	{
+		this._input = file;
+		slice = file.slice || file.webkitSlice || file.mozSlice;
+
+		if (usingAsyncReader)
+		{
+			reader = new FileReader();		// Preferred method of reading files, even in workers
+			reader.onload = bindFunction(this._chunkLoaded, this);
+			reader.onerror = bindFunction(this._chunkError, this);
+		}
+		else
+			reader = new FileReaderSync();	// Hack for running in a web worker in Firefox
+
+		this._nextChunk();	// Starts streaming
+	};
+
+	this._nextChunk = function()
+	{
+		if (!this._finished && (!this._config.preview || this._rowCount < this._config.preview))
+			this._readChunk();
+	};
+
+	this._readChunk = function()
+	{
+		var input = this._input;
+		if (this._config.chunkSize)
+		{
+			var end = Math.min(this._start + this._config.chunkSize, this._input.size);
+			input = slice.call(input, this._start, end);
+		}
+		var txt = reader.readAsText(input, this._config.encoding);
+		if (!usingAsyncReader)
+			this._chunkLoaded({ target: { result: txt } });	// mimic the async signature
+	};
+
+	this._chunkLoaded = function(event)
+	{
+		// Very important to increment start each time before handling results
+		this._start += this._config.chunkSize;
+		this._finished = !this._config.chunkSize || this._start >= this._input.size;
+		this.parseChunk(event.target.result);
+	};
+
+	this._chunkError = function()
+	{
+		this._sendError(reader.error);
+	};
+
+}
+_FileStreamer.prototype = Object.create(ChunkStreamer.prototype);
+_FileStreamer.prototype.constructor = _FileStreamer;
+
+
+function _StringStreamer(config)
+{
+	config = config || {};
+	ChunkStreamer.call(this, config);
+
+	var remaining;
+	this.stream = function(s)
+	{
+		remaining = s;
+		return this._nextChunk();
+	};
+	this._nextChunk = function()
+	{
+		if (this._finished) return;
+		var size = this._config.chunkSize;
+		var chunk;
+		if(size) {
+			chunk = remaining.substring(0, size);
+			remaining = remaining.substring(size);
+		} else {
+			chunk = remaining;
+			remaining = '';
+		}
+		this._finished = !remaining;
+		return this.parseChunk(chunk);
+	};
+}
+_StringStreamer.prototype = Object.create(_StringStreamer.prototype);
+_StringStreamer.prototype.constructor = _StringStreamer;
+
+
+function _ReadableStreamStreamer(config)
+{
+	config = config || {};
+
+	ChunkStreamer.call(this, config);
+
+	var queue = [];
+	var parseOnData = true;
+	var streamHasEnded = false;
+
+	this.pause = function()
+	{
+		ChunkStreamer.prototype.pause.apply(this, arguments);
+		this._input.pause();
+	};
+
+	this.resume = function()
+	{
+		ChunkStreamer.prototype.resume.apply(this, arguments);
+		this._input.resume();
+	};
+
+	this.stream = function(stream)
+	{
+		this._input = stream;
+
+		this._input.on('data', this._streamData);
+		this._input.on('end', this._streamEnd);
+		this._input.on('error', this._streamError);
+	};
+
+	this._checkIsFinished = function()
+	{
+		if (streamHasEnded && queue.length === 1) {
+			this._finished = true;
+		}
+	};
+
+	this._nextChunk = function()
+	{
+		this._checkIsFinished();
+		if (queue.length)
+		{
+			this.parseChunk(queue.shift());
+		}
+		else
+		{
+			parseOnData = true;
+		}
+	};
+
+	this._streamData = bindFunction(function(chunk)
+	{
+		try
+		{
+			queue.push(typeof chunk === 'string' ? chunk : chunk.toString(this._config.encoding));
+
+			if (parseOnData)
+			{
+				parseOnData = false;
+				this._checkIsFinished();
+				this.parseChunk(queue.shift());
+			}
+		}
+		catch (error)
+		{
+			this._streamError(error);
+		}
+	}, this);
+
+	this._streamError = bindFunction(function(error)
+	{
+		this._streamCleanUp();
+		this._sendError(error);
+	}, this);
+
+	this._streamEnd = bindFunction(function()
+	{
+		this._streamCleanUp();
+		streamHasEnded = true;
+		this._streamData('');
+	}, this);
+
+	this._streamCleanUp = bindFunction(function()
+	{
+		this._input.removeListener('data', this._streamData);
+		this._input.removeListener('end', this._streamEnd);
+		this._input.removeListener('error', this._streamError);
+	}, this);
+}
+_ReadableStreamStreamer.prototype = Object.create(ChunkStreamer.prototype);
+_ReadableStreamStreamer.prototype.constructor = _ReadableStreamStreamer;
+
+
+function _DuplexStreamStreamer(_config) {
+	var Duplex = require('stream').Duplex;
+	var config = copy(_config);
+	var parseOnWrite = true;
+	var writeStreamHasFinished = false;
+	var parseCallbackQueue = [];
+	var stream = null;
+
+	this._onCsvData = function(results)
+	{
+		var data = results.data;
+		if (!stream.push(data) && !this._handle.paused()) {
+			// the writeable consumer buffer has filled up
+			// so we need to pause until more items
+			// can be processed
+			this._handle.pause();
+		}
+	};
+
+	this._onCsvComplete = function()
+	{
+		// node will finish the read stream when
+		// null is pushed
+		stream.push(null);
+	};
+
+	config.step = bindFunction(this._onCsvData, this);
+	config.complete = bindFunction(this._onCsvComplete, this);
+	ChunkStreamer.call(this, config);
+
+	this._nextChunk = function()
+	{
+		if (writeStreamHasFinished && parseCallbackQueue.length === 1) {
+			this._finished = true;
+		}
+		if (parseCallbackQueue.length) {
+			parseCallbackQueue.shift()();
+		} else {
+			parseOnWrite = true;
+		}
+	};
+
+	this._addToParseQueue = function(chunk, callback)
+	{
+		// add to queue so that we can indicate
+		// completion via callback
+		// node will automatically pause the incoming stream
+		// when too many items have been added without their
+		// callback being invoked
+		parseCallbackQueue.push(bindFunction(function() {
+			this.parseChunk(typeof chunk === 'string' ? chunk : chunk.toString(config.encoding));
+			if (isFunction(callback)) {
+				return callback();
+			}
+		}, this));
+		if (parseOnWrite) {
+			parseOnWrite = false;
+			this._nextChunk();
+		}
+	};
+
+	this._onRead = function()
+	{
+		if (this._handle.paused()) {
+			// the writeable consumer can handle more data
+			// so resume the chunk parsing
+			this._handle.resume();
+		}
+	};
+
+	this._onWrite = function(chunk, encoding, callback)
+	{
+		this._addToParseQueue(chunk, callback);
+	};
+
+	this._onWriteComplete = function()
+	{
+		writeStreamHasFinished = true;
+		// have to write empty string
+		// so parser knows its done
+		this._addToParseQueue('');
+	};
+
+	this.getStream = function()
+	{
+		return stream;
+	};
+	stream = new Duplex({
+		readableObjectMode: true,
+		decodeStrings: false,
+		read: bindFunction(this._onRead, this),
+		write: bindFunction(this._onWrite, this)
+	});
+	stream.once('finish', bindFunction(this._onWriteComplete, this));
+}
+if (typeof PAPA_BROWSER_CONTEXT === 'undefined') {
+	_DuplexStreamStreamer.prototype = Object.create(ChunkStreamer.prototype);
+	_DuplexStreamStreamer.prototype.constructor = _DuplexStreamStreamer;
+}
+
+
+// Use one ParserHandle per entire CSV file or string
+function _ParserHandle(_config)
+{
+	// One goal is to minimize the use of regular expressions...
+	var MAX_FLOAT = Math.pow(2, 53);
+	var MIN_FLOAT = -MAX_FLOAT;
+	var FLOAT = /^\s*-?(\d+\.?|\.\d+|\d+\.\d+)([eE][-+]?\d+)?\s*$/;
+	var ISO_DATE = /^(\d{4}-[01]\d-[0-3]\dT[0-2]\d:[0-5]\d:[0-5]\d\.\d+([+-][0-2]\d:[0-5]\d|Z))|(\d{4}-[01]\d-[0-3]\dT[0-2]\d:[0-5]\d:[0-5]\d([+-][0-2]\d:[0-5]\d|Z))|(\d{4}-[01]\d-[0-3]\dT[0-2]\d:[0-5]\d([+-][0-2]\d:[0-5]\d|Z))$/;
+	var self = this;
+	var _stepCounter = 0;	// Number of times step was called (number of rows parsed)
+	var _rowCounter = 0;	// Number of rows that have been parsed so far
+	var _input;				// The input being parsed
+	var _parser;			// The core parser being used
+	var _paused = false;	// Whether we are paused or not
+	var _aborted = false;	// Whether the parser has aborted or not
+	var _delimiterError;	// Temporary state between delimiter detection and processing results
+	var _fields = [];		// Fields are from the header row of the input, if there is one
+	var _results = {		// The last results returned from the parser
+		data: [],
+		errors: [],
+		meta: {}
+	};
+
+	if (isFunction(_config.step))
+	{
+		var userStep = _config.step;
+		_config.step = function(results)
+		{
+			_results = results;
+
+			if (needsHeaderRow())
+				processResults();
+			else	// only call user's step function after header row
+			{
+				processResults();
+
+				// It's possbile that this line was empty and there's no row here after all
+				if (_results.data.length === 0)
+					return;
+
+				_stepCounter += results.data.length;
+				if (_config.preview && _stepCounter > _config.preview)
+					_parser.abort();
+				else {
+					_results.data = _results.data[0];
+					userStep(_results, self);
+				}
+			}
+		};
+	}
+
+	/**
+	 * Parses input. Most users won't need, and shouldn't mess with, the baseIndex
+	 * and ignoreLastRow parameters. They are used by streamers (wrapper functions)
+	 * when an input comes in multiple chunks, like from a file.
+	 */
+	this.parse = function(input, baseIndex, ignoreLastRow)
+	{
+		var quoteChar = _config.quoteChar || '"';
+		if (!_config.newline)
+			_config.newline = guessLineEndings(input, quoteChar);
+
+		_delimiterError = false;
+		if (!_config.delimiter)
+		{
+			var delimGuess = guessDelimiter(input, _config.newline, _config.skipEmptyLines, _config.comments, _config.delimitersToGuess);
+			if (delimGuess.successful)
+				_config.delimiter = delimGuess.bestDelimiter;
+			else
+			{
+				_delimiterError = true;	// add error after parsing (otherwise it would be overwritten)
+				_config.delimiter = DefaultDelimiter;
+			}
+			_results.meta.delimiter = _config.delimiter;
+		}
+		else if(isFunction(_config.delimiter))
+		{
+			_config.delimiter = _config.delimiter(input);
+			_results.meta.delimiter = _config.delimiter;
+		}
+
+		var parserConfig = copy(_config);
+		if (_config.preview && _config.header)
+			parserConfig.preview++;	// to compensate for header row
+
+		_input = input;
+		_parser = new _Parser(parserConfig);
+		_results = _parser.parse(_input, baseIndex, ignoreLastRow);
+		processResults();
+		return _paused ? { meta: { paused: true } } : (_results || { meta: { paused: false } });
+	};
+
+	this.paused = function()
+	{
+		return _paused;
+	};
+
+	this.pause = function()
+	{
+		_paused = true;
+		_parser.abort();
+
+		// If it is streaming via "chunking", the reader will start appending correctly already so no need to substring,
+		// otherwise we can get duplicate content within a row
+		_input = isFunction(_config.chunk) ? "" : _input.substring(_parser.getCharIndex());
+	};
+
+	this.resume = function()
+	{
+		if(self.streamer._halted) {
+			_paused = false;
+			self.streamer.parseChunk(_input, true);
+		} else {
+			// Bugfix: #636 In case the processing hasn't halted yet
+			// wait for it to halt in order to resume
+			setTimeout(self.resume, 3);
+		}
+	};
+
+	this.aborted = function()
+	{
+		return _aborted;
+	};
+
+	this.abort = function()
+	{
+		_aborted = true;
+		_parser.abort();
+		_results.meta.aborted = true;
+		if (isFunction(_config.complete))
+			_config.complete(_results);
+		_input = '';
+	};
+
+	function testEmptyLine(s) {
+		return _config.skipEmptyLines === 'greedy' ? s.join('').trim() === '' : s.length === 1 && s[0].length === 0;
+	}
+
+	function testFloat(s) {
+		if (FLOAT.test(s)) {
+			var floatValue = parseFloat(s);
+			if (floatValue > MIN_FLOAT && floatValue < MAX_FLOAT) {
+				return true;
+			}
+		}
+		return false;
+	}
+
+	function processResults()
+	{
+		if (_results && _delimiterError)
+		{
+			addError('Delimiter', 'UndetectableDelimiter', 'Unable to auto-detect delimiting character; defaulted to \'' + DefaultDelimiter + '\'');
+			_delimiterError = false;
+		}
+
+		if (_config.skipEmptyLines)
+		{
+			for (var i = 0; i < _results.data.length; i++)
+				if (testEmptyLine(_results.data[i]))
+					_results.data.splice(i--, 1);
+		}
+
+		if (needsHeaderRow())
+			fillHeaderFields();
+
+		return applyHeaderAndDynamicTypingAndTransformation();
+	}
+
+	function needsHeaderRow()
+	{
+		return _config.header && _fields.length === 0;
+	}
+
+	function fillHeaderFields()
+	{
+		if (!_results)
+			return;
+
+		function addHeader(header, i)
+		{
+			if (isFunction(_config.transformHeader))
+				header = _config.transformHeader(header, i);
+
+			_fields.push(header);
+		}
+
+		if (Array.isArray(_results.data[0]))
+		{
+			for (var i = 0; needsHeaderRow() && i < _results.data.length; i++)
+				_results.data[i].forEach(addHeader);
+
+			_results.data.splice(0, 1);
+		}
+		// if _results.data[0] is not an array, we are in a step where _results.data is the row.
+		else
+			_results.data.forEach(addHeader);
+	}
+
+	function shouldApplyDynamicTyping(field) {
+		// Cache function values to avoid calling it for each row
+		if (_config.dynamicTypingFunction && _config.dynamicTyping[field] === undefined) {
+			_config.dynamicTyping[field] = _config.dynamicTypingFunction(field);
+		}
+		return (_config.dynamicTyping[field] || _config.dynamicTyping) === true;
+	}
+
+	function parseDynamic(field, value)
+	{
+		if (shouldApplyDynamicTyping(field))
+		{
+			if (value === 'true' || value === 'TRUE')
+				return true;
+			else if (value === 'false' || value === 'FALSE')
+				return false;
+			else if (testFloat(value))
+				return parseFloat(value);
+			else if (ISO_DATE.test(value))
+				return new Date(value);
+			else
+				return (value === '' ? null : value);
+		}
+		return value;
+	}
+
+	function applyHeaderAndDynamicTypingAndTransformation()
+	{
+		if (!_results || (!_config.header && !_config.dynamicTyping && !_config.transform))
+			return _results;
+
+		function processRow(rowSource, i)
+		{
+			var row = _config.header ? {} : [];
+
+			var j;
+			for (j = 0; j < rowSource.length; j++)
+			{
+				var field = j;
+				var value = rowSource[j];
+
+				if (_config.header)
+					field = j >= _fields.length ? '__parsed_extra' : _fields[j];
+
+				if (_config.transform)
+					value = _config.transform(value,field);
+
+				value = parseDynamic(field, value);
+
+				if (field === '__parsed_extra')
+				{
+					row[field] = row[field] || [];
+					row[field].push(value);
+				}
+				else
+					row[field] = value;
+			}
+
+
+			if (_config.header)
+			{
+				if (j > _fields.length)
+					addError('FieldMismatch', 'TooManyFields', 'Too many fields: expected ' + _fields.length + ' fields but parsed ' + j, _rowCounter + i);
+				else if (j < _fields.length)
+					addError('FieldMismatch', 'TooFewFields', 'Too few fields: expected ' + _fields.length + ' fields but parsed ' + j, _rowCounter + i);
+			}
+
+			return row;
+		}
+
+		var incrementBy = 1;
+		if (!_results.data.length || Array.isArray(_results.data[0]))
+		{
+			_results.data = _results.data.map(processRow);
+			incrementBy = _results.data.length;
+		}
+		else
+			_results.data = processRow(_results.data, 0);
+
+
+		if (_config.header && _results.meta)
+			_results.meta.fields = _fields;
+
+		_rowCounter += incrementBy;
+		return _results;
+	}
+
+	function guessDelimiter(input, newline, skipEmptyLines, comments, delimitersToGuess) {
+		var bestDelim, bestDelta, fieldCountPrevRow, maxFieldCount;
+
+		delimitersToGuess = delimitersToGuess || [',', '\t', '|', ';', RECORD_SEP, UNIT_SEP];
+
+		for (var i = 0; i < delimitersToGuess.length; i++) {
+			var delim = delimitersToGuess[i];
+			var delta = 0, avgFieldCount = 0, emptyLinesCount = 0;
+			fieldCountPrevRow = undefined;
+
+			var preview = new _Parser({
+				comments: comments,
+				delimiter: delim,
+				newline: newline,
+				preview: 10
+			}).parse(input);
+
+			for (var j = 0; j < preview.data.length; j++) {
+				if (skipEmptyLines && testEmptyLine(preview.data[j])) {
+					emptyLinesCount++;
+					continue;
+				}
+				var fieldCount = preview.data[j].length;
+				avgFieldCount += fieldCount;
+
+				if (typeof fieldCountPrevRow === 'undefined') {
+					fieldCountPrevRow = fieldCount;
+					continue;
+				}
+				else if (fieldCount > 0) {
+					delta += Math.abs(fieldCount - fieldCountPrevRow);
+					fieldCountPrevRow = fieldCount;
+				}
+			}
+
+			if (preview.data.length > 0)
+				avgFieldCount /= (preview.data.length - emptyLinesCount);
+
+			if ((typeof bestDelta === 'undefined' || delta <= bestDelta)
+				&& (typeof maxFieldCount === 'undefined' || avgFieldCount > maxFieldCount) && avgFieldCount > 1.99) {
+				bestDelta = delta;
+				bestDelim = delim;
+				maxFieldCount = avgFieldCount;
+			}
+		}
+
+		_config.delimiter = bestDelim;
+
+		return {
+			successful: !!bestDelim,
+			bestDelimiter: bestDelim
+		};
+	}
+
+	function guessLineEndings(input, quoteChar)
+	{
+		input = input.substring(0, 1024 * 1024);	// max length 1 MB
+		// Replace all the text inside quotes
+		var re = new RegExp(escapeRegExp(quoteChar) + '([^]*?)' + escapeRegExp(quoteChar), 'gm');
+		input = input.replace(re, '');
+
+		var r = input.split('\r');
+
+		var n = input.split('\n');
+
+		var nAppearsFirst = (n.length > 1 && n[0].length < r[0].length);
+
+		if (r.length === 1 || nAppearsFirst)
+			return '\n';
+
+		var numWithN = 0;
+		for (var i = 0; i < r.length; i++)
+		{
+			if (r[i][0] === '\n')
+				numWithN++;
+		}
+
+		return numWithN >= r.length / 2 ? '\r\n' : '\r';
+	}
+
+	function addError(type, code, msg, row)
+	{
+		var error = {
+			type: type,
+			code: code,
+			message: msg
+		};
+		if(row !== undefined) {
+			error.row = row;
+		}
+		_results.errors.push(error);
+	}
+}
+
+/** https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions */
+function escapeRegExp(string)
+{
+	return string.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'); // $& means the whole matched string
+}
+
+/** The core parser implements speedy and correct CSV parsing */
+function _Parser(config)
+{
+	// Unpack the config object
+	config = config || {};
+	var delim = config.delimiter;
+	var newline = config.newline;
+	var comments = config.comments;
+	var step = config.step;
+	var preview = config.preview;
+	var fastMode = config.fastMode;
+	var quoteChar;
+	/** Allows for no quoteChar by setting quoteChar to undefined in config */
+	if (config.quoteChar === undefined) {
+		quoteChar = '"';
+	} else {
+		quoteChar = config.quoteChar;
+	}
+	var escapeChar = quoteChar;
+	if (config.escapeChar !== undefined) {
+		escapeChar = config.escapeChar;
+	}
+
+	// Delimiter must be valid
+	if (typeof delim !== 'string'
+		|| BAD_DELIMITERS.indexOf(delim) > -1)
+		delim = ',';
+
+	// Comment character must be valid
+	if (comments === delim)
+		throw new Error('Comment character same as delimiter');
+	else if (comments === true)
+		comments = '#';
+	else if (typeof comments !== 'string'
+		|| BAD_DELIMITERS.indexOf(comments) > -1)
+		comments = false;
+
+	// Newline must be valid: \r, \n, or \r\n
+	if (newline !== '\n' && newline !== '\r' && newline !== '\r\n')
+		newline = '\n';
+
+	// We're gonna need these at the Parser scope
+	var cursor = 0;
+	var aborted = false;
+
+	this.parse = function(input, baseIndex, ignoreLastRow)
+	{
+		// For some reason, in Chrome, this speeds things up (!?)
+		if (typeof input !== 'string')
+			throw new Error('Input must be a string');
+
+		// We don't need to compute some of these every time parse() is called,
+		// but having them in a more local scope seems to perform better
+		var inputLen = input.length,
+			delimLen = delim.length,
+			newlineLen = newline.length,
+			commentsLen = comments.length;
+		var stepIsFunction = isFunction(step);
+
+		// Establish starting state
+		cursor = 0;
+		var data = [], errors = [], row = [], lastCursor = 0;
+
+		if (!input)
+			return returnable();
+
+		if (fastMode || (fastMode !== false && input.indexOf(quoteChar) === -1))
+		{
+			var rows = input.split(newline);
+			for (var i = 0; i < rows.length; i++)
+			{
+				row = rows[i];
+				cursor += row.length;
+				if (i !== rows.length - 1)
+					cursor += newline.length;
+				else if (ignoreLastRow)
+					return returnable();
+				if (comments && row.substring(0, commentsLen) === comments)
+					continue;
+				if (stepIsFunction)
+				{
+					data = [];
+					pushRow(row.split(delim));
+					doStep();
+					if (aborted)
+						return returnable();
+				}
+				else
+					pushRow(row.split(delim));
+				if (preview && i >= preview)
+				{
+					data = data.slice(0, preview);
+					return returnable(true);
+				}
+			}
+			return returnable();
+		}
+
+		var nextDelim = input.indexOf(delim, cursor);
+		var nextNewline = input.indexOf(newline, cursor);
+		var quoteCharRegex = new RegExp(escapeRegExp(escapeChar) + escapeRegExp(quoteChar), 'g');
+		var quoteSearch = input.indexOf(quoteChar, cursor);
+
+		// Parser loop
+		for (;;)
+		{
+			// Field has opening quote
+			if (input[cursor] === quoteChar)
+			{
+				// Start our search for the closing quote where the cursor is
+				quoteSearch = cursor;
+
+				// Skip the opening quote
+				cursor++;
+
+				for (;;)
+				{
+					// Find closing quote
+					quoteSearch = input.indexOf(quoteChar, quoteSearch + 1);
+
+					//No other quotes are found - no other delimiters
+					if (quoteSearch === -1)
+					{
+						if (!ignoreLastRow) {
+							// No closing quote... what a pity
+							errors.push({
+								type: 'Quotes',
+								code: 'MissingQuotes',
+								message: 'Quoted field unterminated',
+								row: data.length,	// row has yet to be inserted
+								index: cursor
+							});
+						}
+						return finish();
+					}
+
+					// Closing quote at EOF
+					if (quoteSearch === inputLen - 1)
+					{
+						var value = input.substring(cursor, quoteSearch).replace(quoteCharRegex, quoteChar);
+						return finish(value);
+					}
+
+					// If this quote is escaped, it's part of the data; skip it
+					// If the quote character is the escape character, then check if the next character is the escape character
+					if (quoteChar === escapeChar &&  input[quoteSearch + 1] === escapeChar)
+					{
+						quoteSearch++;
+						continue;
+					}
+
+					// If the quote character is not the escape character, then check if the previous character was the escape character
+					if (quoteChar !== escapeChar && quoteSearch !== 0 && input[quoteSearch - 1] === escapeChar)
+					{
+						continue;
+					}
+
+					if(nextDelim !== -1 && nextDelim < (quoteSearch + 1)) {
+						nextDelim = input.indexOf(delim, (quoteSearch + 1));
+					}
+					if(nextNewline !== -1 && nextNewline < (quoteSearch + 1)) {
+						nextNewline = input.indexOf(newline, (quoteSearch + 1));
+					}
+					// Check up to nextDelim or nextNewline, whichever is closest
+					var checkUpTo = nextNewline === -1 ? nextDelim : Math.min(nextDelim, nextNewline);
+					var spacesBetweenQuoteAndDelimiter = extraSpaces(checkUpTo);
+
+					// Closing quote followed by delimiter or 'unnecessary spaces + delimiter'
+					if (input[quoteSearch + 1 + spacesBetweenQuoteAndDelimiter] === delim)
+					{
+						row.push(input.substring(cursor, quoteSearch).replace(quoteCharRegex, quoteChar));
+						cursor = quoteSearch + 1 + spacesBetweenQuoteAndDelimiter + delimLen;
+
+						// If char after following delimiter is not quoteChar, we find next quote char position
+						if (input[quoteSearch + 1 + spacesBetweenQuoteAndDelimiter + delimLen] !== quoteChar)
+						{
+							quoteSearch = input.indexOf(quoteChar, cursor);
+						}
+						nextDelim = input.indexOf(delim, cursor);
+						nextNewline = input.indexOf(newline, cursor);
+						break;
+					}
+
+					var spacesBetweenQuoteAndNewLine = extraSpaces(nextNewline);
+
+					// Closing quote followed by newline or 'unnecessary spaces + newLine'
+					if (input.substring(quoteSearch + 1 + spacesBetweenQuoteAndNewLine, quoteSearch + 1 + spacesBetweenQuoteAndNewLine + newlineLen) === newline)
+					{
+						row.push(input.substring(cursor, quoteSearch).replace(quoteCharRegex, quoteChar));
+						saveRow(quoteSearch + 1 + spacesBetweenQuoteAndNewLine + newlineLen);
+						nextDelim = input.indexOf(delim, cursor);	// because we may have skipped the nextDelim in the quoted field
+						quoteSearch = input.indexOf(quoteChar, cursor);	// we search for first quote in next line
+
+						if (stepIsFunction)
+						{
+							doStep();
+							if (aborted)
+								return returnable();
+						}
+
+						if (preview && data.length >= preview)
+							return returnable(true);
+
+						break;
+					}
+
+
+					// Checks for valid closing quotes are complete (escaped quotes or quote followed by EOF/delimiter/newline) -- assume these quotes are part of an invalid text string
+					errors.push({
+						type: 'Quotes',
+						code: 'InvalidQuotes',
+						message: 'Trailing quote on quoted field is malformed',
+						row: data.length,	// row has yet to be inserted
+						index: cursor
+					});
+
+					quoteSearch++;
+					continue;
+
+				}
+
+				continue;
+			}
+
+			// Comment found at start of new line
+			if (comments && row.length === 0 && input.substring(cursor, cursor + commentsLen) === comments)
+			{
+				if (nextNewline === -1)	// Comment ends at EOF
+					return returnable();
+				cursor = nextNewline + newlineLen;
+				nextNewline = input.indexOf(newline, cursor);
+				nextDelim = input.indexOf(delim, cursor);
+				continue;
+			}
+
+			// Next delimiter comes before next newline, so we've reached end of field
+			if (nextDelim !== -1 && (nextDelim < nextNewline || nextNewline === -1))
+			{
+				row.push(input.substring(cursor, nextDelim));
+				cursor = nextDelim + delimLen;
+				// we look for next delimiter char
+				nextDelim = input.indexOf(delim, cursor);
+				continue;
+			}
+
+			// End of row
+			if (nextNewline !== -1)
+			{
+				row.push(input.substring(cursor, nextNewline));
+				saveRow(nextNewline + newlineLen);
+
+				if (stepIsFunction)
+				{
+					doStep();
+					if (aborted)
+						return returnable();
+				}
+
+				if (preview && data.length >= preview)
+					return returnable(true);
+
+				continue;
+			}
+
+			break;
+		}
+
+
+		return finish();
+
+
+		function pushRow(row)
+		{
+			data.push(row);
+			lastCursor = cursor;
+		}
+
+		/**
+		 * checks if there are extra spaces after closing quote and given index without any text
+		 * if Yes, returns the number of spaces
+		 */
+		function extraSpaces(index) {
+			var spaceLength = 0;
+			if (index !== -1) {
+				var textBetweenClosingQuoteAndIndex = input.substring(quoteSearch + 1, index);
+				if (textBetweenClosingQuoteAndIndex && textBetweenClosingQuoteAndIndex.trim() === '') {
+					spaceLength = textBetweenClosingQuoteAndIndex.length;
+				}
+			}
+			return spaceLength;
+		}
+
+		/**
+		 * Appends the remaining input from cursor to the end into
+		 * row, saves the row, calls step, and returns the results.
+		 */
+		function finish(value)
+		{
+			if (ignoreLastRow)
+				return returnable();
+			if (typeof value === 'undefined')
+				value = input.substring(cursor);
+			row.push(value);
+			cursor = inputLen;	// important in case parsing is paused
+			pushRow(row);
+			if (stepIsFunction)
+				doStep();
+			return returnable();
+		}
+
+		/**
+		 * Appends the current row to the results. It sets the cursor
+		 * to newCursor and finds the nextNewline. The caller should
+		 * take care to execute user's step function and check for
+		 * preview and end parsing if necessary.
+		 */
+		function saveRow(newCursor)
+		{
+			cursor = newCursor;
+			pushRow(row);
+			row = [];
+			nextNewline = input.indexOf(newline, cursor);
+		}
+
+		/** Returns an object with the results, errors, and meta. */
+		function returnable(stopped)
+		{
+			return {
+				data: data,
+				errors: errors,
+				meta: {
+					delimiter: delim,
+					linebreak: newline,
+					aborted: aborted,
+					truncated: !!stopped,
+					cursor: lastCursor + (baseIndex || 0)
+				}
+			};
+		}
+
+		/** Executes the user's step function and resets data & errors. */
+		function doStep()
+		{
+			step(returnable());
+			data = [];
+			errors = [];
+		}
+	};
+
+	/** Sets the abort flag */
+	this.abort = function()
+	{
+		aborted = true;
+	};
+
+	/** Gets the cursor position */
+	this.getCharIndex = function()
+	{
+		return cursor;
+	};
+}
+
+
+function newWorker()
+{
+	if (!WORKERS_SUPPORTED)
+		return false;
+
+	var workerUrl = SCRIPT_URL;
+	var w = new global.Worker(workerUrl, { name: PAPA_WORKER_NAME, type: import.meta.papaIsUMD ? undefined : 'module' });
+	w.onmessage = mainThreadReceivedMessage;
+	w.id = workerIdCounter++;
+	workers[w.id] = w;
+	return w;
+}
+
+/** Callback when main thread receives a message */
+function mainThreadReceivedMessage(e)
+{
+	var msg = e.data;
+	var worker = workers[msg.workerId];
+	var aborted = false;
+
+	if (msg.error)
+		worker.userError(msg.error, msg.file);
+	else if (msg.results && msg.results.data)
+	{
+		var abort = function() {
+			aborted = true;
+			completeWorker(msg.workerId, { data: [], errors: [], meta: { aborted: true } });
+		};
+
+		var handle = {
+			abort: abort,
+			pause: notImplemented,
+			resume: notImplemented
+		};
+
+		if (isFunction(worker.userStep))
+		{
+			for (var i = 0; i < msg.results.data.length; i++)
+			{
+				worker.userStep({
+					data: msg.results.data[i],
+					errors: msg.results.errors,
+					meta: msg.results.meta
+				}, handle);
+				if (aborted)
+					break;
+			}
+			delete msg.results;	// free memory ASAP
+		}
+		else if (isFunction(worker.userChunk))
+		{
+			worker.userChunk(msg.results, handle, msg.file);
+			delete msg.results;
+		}
+	}
+
+	if (msg.finished && !aborted)
+		completeWorker(msg.workerId, msg.results);
+}
+
+function completeWorker(workerId, results) {
+	var worker = workers[workerId];
+	if (isFunction(worker.userComplete))
+		worker.userComplete(results);
+	worker.terminate();
+	delete workers[workerId];
+}
+
+function notImplemented() {
+	throw new Error('Not implemented.');
+}
+
+/** Callback when worker thread receives a message */
+function workerThreadReceivedMessage(e)
+{
+	var msg = e.data;
+
+	if (typeof WORKER_ID === 'undefined' && msg)
+		WORKER_ID = msg.workerId;
+
+	if (typeof msg.input === 'string')
+	{
+		global.postMessage({
+			workerId: WORKER_ID,
+			results: parse(msg.input, msg.config),
+			finished: true
+		});
+	}
+	else if ((global.File && msg.input instanceof File) || msg.input instanceof Object)	// thank you, Safari (see issue #106)
+	{
+		var results = parse(msg.input, msg.config);
+		if (results)
+			global.postMessage({
+				workerId: WORKER_ID,
+				results: results,
+				finished: true
+			});
+	}
+}
+
+/** Makes a deep copy of an array or object (mostly) */
+function copy(obj)
+{
+	if (typeof obj !== 'object' || obj === null)
+		return obj;
+	var cpy = Array.isArray(obj) ? [] : {};
+	for (var key in obj)
+		cpy[key] = copy(obj[key]);
+	return cpy;
+}
+
+function bindFunction(f, self)
+{
+	return function() { f.apply(self, arguments); };
+}
+
+function isFunction(func)
+{
+	return typeof func === 'function';
+}
diff --git a/rollup.config.mjs b/rollup.config.mjs
new file mode 100644
index 00000000..c4da7054
--- /dev/null
+++ b/rollup.config.mjs
@@ -0,0 +1,32 @@
+import { terser } from "rollup-plugin-terser";
+
+export default {
+	input: 'papaparse.mjs',
+	output: [
+		{
+			name: 'Papa',
+			file: 'papaparse.js',
+			format: 'umd'
+		},
+		{
+			name: 'Papa',
+			file: 'papaparse.min.js',
+			format: 'umd',
+			plugins: [terser()]
+		}
+	],
+	plugins: [
+		{
+			resolveImportMeta(prop, { format }) {
+				if (format === 'umd') {
+					if (prop === 'url') {
+						return 'global && global.document && global.document.currentScript && global.document.currentScript.src';
+					}
+					if (prop === 'papaIsUMD') {
+						return 'true';
+					}
+				}
+			}
+		}
+	]
+};
diff --git a/tests/test.js b/tests/test.js
index 27418318..c68584e5 100644
--- a/tests/test.js
+++ b/tests/test.js
@@ -6,15 +6,22 @@ var childProcess = require('child_process');
 
 var server = connect().use(serveStatic(path.join(__dirname, '/..'))).listen(8071, function() {
 	if (process.argv.indexOf('--mocha-headless-chrome') !== -1) {
-		childProcess.spawn('node_modules/.bin/mocha-headless-chrome', ['-f', 'http://localhost:8071/tests/tests.html'], {
+		console.log('Running UMD tests...');
+		childProcess.spawn('node_modules/.bin/mocha-headless-chrome', ['-f', 'http://localhost:8071/tests/tests.umd.html'], {
 			stdio: 'inherit'
-		}).on('exit', function(code) {
-			server.close();
-			process.exit(code);  // eslint-disable-line no-process-exit
+		}).on('exit', function() {
+			console.log('Running ESM tests...');
+			childProcess.spawn('node_modules/.bin/mocha-headless-chrome', ['-f', 'http://localhost:8071/tests/tests.esm.html'], {
+				stdio: 'inherit'
+			}).on('exit', function(code) {
+				server.close();
+				process.exit(code);  // eslint-disable-line no-process-exit
+			});
 		});
 
 	} else {
-		open('http://localhost:8071/tests/tests.html');
+		open('http://localhost:8071/tests/tests.umd.html');
+		open('http://localhost:8071/tests/tests.esm.html');
 		console.log('Serving tests...');
 	}
 });
diff --git a/tests/tests.esm.html b/tests/tests.esm.html
new file mode 100644
index 00000000..da901003
--- /dev/null
+++ b/tests/tests.esm.html
@@ -0,0 +1,21 @@
+<html>
+	<head>
+		<title>Papa Parse Tests</title>
+		<meta charset="utf-8">
+		<link rel="stylesheet" href="../node_modules/mocha/mocha.css" />
+	</head>
+	<body>
+		<div id="mocha"></div>
+		<script src="../node_modules/mocha/mocha.js" defer></script>
+		<script src="../node_modules/chai/chai.js" defer></script>
+		<script src="../papaparse.js" defer></script>
+		<script type="module">
+			mocha.setup('bdd');
+			mocha.checkLeaks();
+		</script>
+		<script src="test-cases.js" id="test-cases" defer></script>
+		<script type="module">
+			mocha.run();
+		</script>
+	</body>
+</html>
diff --git a/tests/tests.html b/tests/tests.html
deleted file mode 100644
index a3ce51e7..00000000
--- a/tests/tests.html
+++ /dev/null
@@ -1,22 +0,0 @@
-<html>
-	<head>
-		<title>Papa Parse Tests</title>
-		<meta charset="utf-8">
-		<script src="../node_modules/mocha/mocha.js"></script>
-		<link rel="stylesheet" href="../node_modules/mocha/mocha.css" />
-		<script src="../papaparse.js"></script>
-		
-		<script src="../node_modules/chai/chai.js"></script>
-
-		<script>mocha.setup('bdd')</script>
-		<script src="test-cases.js" id="test-cases"></script>
-	</head>
-	<body>
-	<div id="mocha"></div>
-
-	<script>
-		mocha.checkLeaks();
-		mocha.run();
-	</script>
-	</body>
-</html>
diff --git a/tests/tests.umd.html b/tests/tests.umd.html
new file mode 100644
index 00000000..409bbd8b
--- /dev/null
+++ b/tests/tests.umd.html
@@ -0,0 +1,22 @@
+<html>
+	<head>
+		<title>Papa Parse Tests</title>
+		<meta charset="utf-8">
+		<link rel="stylesheet" href="../node_modules/mocha/mocha.css" />
+	</head>
+	<body>
+		<div id="mocha"></div>
+		<script src="../node_modules/mocha/mocha.js"defer></script>
+		<script src="../node_modules/chai/chai.js" defer></script>
+		<script type="module">
+			import * as Papa from '../papaparse.mjs';
+			window.Papa = Papa;
+			mocha.setup('bdd');
+			mocha.checkLeaks();
+		</script>
+		<script src="test-cases.js" id="test-cases" defer></script>
+		<script type="module">
+			mocha.run();
+		</script>
+	</body>
+</html>