ESM support

fixes #977

Author: btakita

esm/index.browser.mjs

@@ -0,0 +1,2 @@
+import '../papaparse.js';
+export default globalThis.Papa;

esm/index.mjs

@@ -0,0 +1,3 @@
+import { createRequire } from 'module';
+const require = createRequire(import.meta.url);
+export default require('../papaparse.js');

esm/package.json

@@ -0,0 +1,4 @@
+{
+	"module": "./index.mjs",
+	"browser": "./index.browser.mjs"
+}

package.json

@@ -35,6 +35,7 @@
 	},
 	"license": "MIT",
 	"main": "papaparse.js",
+	"module": "papaparse.mjs",
 	"browser": "papaparse.min.js",
 	"devDependencies": {
 		"chai": "^4.2.0",

papaparse.js

@@ -10,18 +10,21 @@ License: MIT
 	/* globals define */
 	if (typeof define === 'function' && define.amd)
 	{
+		console.debug('papaparse.js|amd|debug|1')
 		// AMD. Register as an anonymous module.
 		define([], factory);
 	}
 	else if (typeof module === 'object' && typeof exports !== 'undefined')
 	{
+		console.debug('papaparse.js|exports|debug|1')
 		// Node. Does not work with strict CommonJS, but
 		// only CommonJS-like environments that support module.exports,
 		// like Node.
 		module.exports = factory();
 	}
 	else
 	{
+		console.debug('papaparse.js|root.Papa|debug|1')
 		// Browser globals (root is window)
 		root.Papa = factory();
 	}

papaparse.mjs

@@ -0,0 +1,2 @@
+import Papa from './esm';
+export default Papa;