added example of node code

node/example.js

@@ -0,0 +1,49 @@
+/* global require */
+
+const fs = require("fs");
+const SingleFileNode = require("./single-file-node.js");
+const jsdom = require("jsdom");
+const request = require("request-promise-native");
+
+run({
+	url: "https://github.com/gildas-lormeau/SingleFile",
+	userAgent: "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:65.0) Gecko Firefox AppleWebKit (KHTML, like Gecko) Chrome Safari",
+	removeHiddenElements: true,
+	removeUnusedStyles: true,
+	removeUnusedFonts: true,
+	removeFrames: true,
+	removeImports: true,
+	removeScripts: true,
+	compressHTML: true,
+	compressCSS: true,
+	loadDeferredImages: false,
+	filenameTemplate: "{page-title} ({date-iso} {time-locale}).html",
+	removeAudioSrc: true,
+	removeVideoSrc: true,
+	displayInfobar: true,
+	removeAlternativeFonts: true,
+	removeAlternativeMedias: true,
+	removeAlternativeImages: true,
+	groupDuplicateImages: true
+});
+
+async function run(options) {
+	const pageContent = (await request({
+		method: "GET",
+		uri: options.url,
+		resolveWithFullResponse: true,
+		encoding: null,
+		headers: {
+			"User-Agent": options.userAgent
+		}
+	})).body.toString();
+	const dom = new jsdom.JSDOM(pageContent, { url: options.url, virtualConsole: new jsdom.VirtualConsole(), userAgent: options.userAgent });
+	options.win = dom.window;
+	options.doc = dom.window.document;
+	options.saveRawPage = true;
+	const processor = new (SingleFileNode.getClass())(options);
+	await processor.initialize();
+	await processor.run();
+	const page = await processor.getPageData();
+	fs.writeFileSync(page.filename, page.content);
+}