Use template literals instead of string concatenation (#3066)

We have used it inconsistently till now. Template literals are more
modern and easier to maintain in my opinion.

Because that's a large amount of changes, here's a way to reproduce it:
I added the rule `"prefer-template": "error"` to the `.eslintrc.json`
and did an autofix. Since this caused a new problem in line 409 of
`newsfeed.js`, I reversed it in that line and also removed the rule from
the eslint config file.

The rule is described here:
https://eslint.org/docs/latest/rules/prefer-template

Note: I've played around with some other linter rules as well, and some
seem to point to some specific, non-cosmetic, issues. But before I dive
even deeper and then introduce even bigger and hardly understandable
changes at once, I thought I'd start with this simple cosmetic rule.

.eslintrc.json

@@ -22,10 +22,10 @@
 		}
 	},
 	"rules": {
-		"prettier/prettier": "error",
 		"eqeqeq": "error",
 		"no-prototype-builtins": "off",
 		"no-unused-vars": "off",
-		"no-useless-return": "error"
+		"no-useless-return": "error",
+		"prefer-template": "error"
 	}
 }

CHANGELOG.md

@@ -55,6 +55,7 @@ _This release is scheduled to be released on 2023-04-01._
 - Fix wrong vertical alignment of calendar title column when wrapEvents is true (#3053)
 - Fix empty news feed stopping the reload forever
 - Fix e2e tests (failed after async changes) by running calendar and newsfeed tests last
+- Lint: Use template literals instead of string concatenation
 - Fix default alert module to render HTML for title and message
 
 ## [2.22.0] - 2023-01-01

js/app.js

@@ -18,7 +18,7 @@ const envsub = require("envsub");
 
 // Get version number.
 global.version = require(`${__dirname}/../package.json`).version;
-Log.log("Starting MagicMirror: v" + global.version);
+Log.log(`Starting MagicMirror: v${global.version}`);
 
 // global absolute root path
 global.root_path = path.resolve(`${__dirname}/../`);
@@ -64,7 +64,7 @@ function App() {
 		// For this check proposed to TestSuite
 		// https://forum.magicmirror.builders/topic/1456/test-suite-for-magicmirror/8
 		const configFilename = path.resolve(global.configuration_file || `${global.root_path}/config/config.js`);
-		let templateFile = configFilename + ".template";
+		let templateFile = `${configFilename}.template`;
 
 		// check if templateFile exists
 		try {
@@ -78,21 +78,21 @@ function App() {
 			// save current config.js
 			try {
 				if (fs.existsSync(configFilename)) {
-					fs.copyFileSync(configFilename, configFilename + "_" + Date.now());
+					fs.copyFileSync(configFilename, `${configFilename}_${Date.now()}`);
 				}
 			} catch (err) {
-				Log.warn("Could not copy " + configFilename + ": " + err.message);
+				Log.warn(`Could not copy ${configFilename}: ${err.message}`);
 			}
 
 			// check if config.env exists
 			const envFiles = [];
-			const configEnvFile = configFilename.substr(0, configFilename.lastIndexOf(".")) + ".env";
+			const configEnvFile = `${configFilename.substr(0, configFilename.lastIndexOf("."))}.env`;
 			try {
 				if (fs.existsSync(configEnvFile)) {
 					envFiles.push(configEnvFile);
 				}
 			} catch (err) {
-				Log.debug(configEnvFile + " does not exist. " + err.message);
+				Log.debug(`${configEnvFile} does not exist. ${err.message}`);
 			}
 
 			let options = {
@@ -110,7 +110,7 @@ function App() {
 			try {
 				await envsub({ templateFile, outputFile, options });
 			} catch (err) {
-				Log.error("Could not envsubst variables: " + err.message);
+				Log.error(`Could not envsubst variables: ${err.message}`);
 			}
 		}
 

js/loader.js

@@ -44,7 +44,7 @@ const Loader = (function () {
 		// Starting modules also hides any modules that have requested to be initially hidden
 		for (const thisModule of moduleObjects) {
 			if (thisModule.data.hiddenOnStartup) {
-				Log.info("Initially hiding " + thisModule.name);
+				Log.info(`Initially hiding ${thisModule.name}`);
 				thisModule.hide();
 			}
 		}
@@ -73,10 +73,10 @@ const Loader = (function () {
 
 			const elements = module.split("/");
 			const moduleName = elements[elements.length - 1];
-			let moduleFolder = config.paths.modules + "/" + module;
+			let moduleFolder = `${config.paths.modules}/${module}`;
 
 			if (defaultModules.indexOf(moduleName) !== -1) {
-				moduleFolder = config.paths.modules + "/default/" + module;
+				moduleFolder = `${config.paths.modules}/default/${module}`;
 			}
 
 			if (moduleData.disabled === true) {
@@ -85,16 +85,16 @@ const Loader = (function () {
 
 			moduleFiles.push({
 				index: index,
-				identifier: "module_" + index + "_" + module,
+				identifier: `module_${index}_${module}`,
 				name: moduleName,
-				path: moduleFolder + "/",
-				file: moduleName + ".js",
+				path: `${moduleFolder}/`,
+				file: `${moduleName}.js`,
 				position: moduleData.position,
 				hiddenOnStartup: moduleData.hiddenOnStartup,
 				header: moduleData.header,
 				configDeepMerge: typeof moduleData.configDeepMerge === "boolean" ? moduleData.configDeepMerge : false,
 				config: moduleData.config,
-				classes: typeof moduleData.classes !== "undefined" ? moduleData.classes + " " + module : module
+				classes: typeof moduleData.classes !== "undefined" ? `${moduleData.classes} ${module}` : module
 			});
 		});
 
@@ -136,17 +136,17 @@ const Loader = (function () {
 	 * @param {Module} mObj Modules instance.
 	 */
 	const bootstrapModule = async function (module, mObj) {
-		Log.info("Bootstrapping module: " + module.name);
+		Log.info(`Bootstrapping module: ${module.name}`);
 		mObj.setData(module);
 
 		await mObj.loadScripts();
-		Log.log("Scripts loaded for: " + module.name);
+		Log.log(`Scripts loaded for: ${module.name}`);
 
 		await mObj.loadStyles();
-		Log.log("Styles loaded for: " + module.name);
+		Log.log(`Styles loaded for: ${module.name}`);
 
 		await mObj.loadTranslations();
-		Log.log("Translations loaded for: " + module.name);
+		Log.log(`Translations loaded for: ${module.name}`);
 
 		moduleObjects.push(mObj);
 	};
@@ -164,7 +164,7 @@ const Loader = (function () {
 		switch (extension.toLowerCase()) {
 			case "js":
 				return new Promise((resolve) => {
-					Log.log("Load script: " + fileName);
+					Log.log(`Load script: ${fileName}`);
 					script = document.createElement("script");
 					script.type = "text/javascript";
 					script.src = fileName;
@@ -179,7 +179,7 @@ const Loader = (function () {
 				});
 			case "css":
 				return new Promise((resolve) => {
-					Log.log("Load stylesheet: " + fileName);
+					Log.log(`Load stylesheet: ${fileName}`);
 
 					stylesheet = document.createElement("link");
 					stylesheet.rel = "stylesheet";
@@ -236,7 +236,7 @@ const Loader = (function () {
 		 */
 		loadFileForModule: async function (fileName, module) {
 			if (loadedFiles.indexOf(fileName.toLowerCase()) !== -1) {
-				Log.log("File already loaded: " + fileName);
+				Log.log(`File already loaded: ${fileName}`);
 				return;
 			}
 
@@ -251,7 +251,7 @@ const Loader = (function () {
 				// This file is available in the vendor folder.
 				// Load it from this vendor folder.
 				loadedFiles.push(fileName.toLowerCase());
-				return loadFile(config.paths.vendor + "/" + vendor[fileName]);
+				return loadFile(`${config.paths.vendor}/${vendor[fileName]}`);
 			}
 
 			// File not loaded yet.

js/main.js

@@ -29,7 +29,7 @@ const MM = (function () {
 			dom.className = module.name;
 
 			if (typeof module.data.classes === "string") {
-				dom.className = "module " + dom.className + " " + module.data.classes;
+				dom.className = `module ${dom.className} ${module.data.classes}`;
 			}
 
 			dom.opacity = 0;
@@ -243,7 +243,7 @@ const MM = (function () {
 
 		const moduleWrapper = document.getElementById(module.identifier);
 		if (moduleWrapper !== null) {
-			moduleWrapper.style.transition = "opacity " + speed / 1000 + "s";
+			moduleWrapper.style.transition = `opacity ${speed / 1000}s`;
 			moduleWrapper.style.opacity = 0;
 			moduleWrapper.classList.add("hidden");
 
@@ -291,7 +291,7 @@ const MM = (function () {
 		// Check if there are no more lockstrings set, or the force option is set.
 		// Otherwise cancel show action.
 		if (module.lockStrings.length !== 0 && options.force !== true) {
-			Log.log("Will not show " + module.name + ". LockStrings active: " + module.lockStrings.join(","));
+			Log.log(`Will not show ${module.name}. LockStrings active: ${module.lockStrings.join(",")}`);
 			if (typeof options.onError === "function") {
 				options.onError(new Error("LOCK_STRING_ACTIVE"));
 			}
@@ -302,13 +302,13 @@ const MM = (function () {
 
 		// If forced show, clean current lockstrings.
 		if (module.lockStrings.length !== 0 && options.force === true) {
-			Log.log("Force show of module: " + module.name);
+			Log.log(`Force show of module: ${module.name}`);
 			module.lockStrings = [];
 		}
 
 		const moduleWrapper = document.getElementById(module.identifier);
 		if (moduleWrapper !== null) {
-			moduleWrapper.style.transition = "opacity " + speed / 1000 + "s";
+			moduleWrapper.style.transition = `opacity ${speed / 1000}s`;
 			// Restore the position. See hideModule() for more info.
 			moduleWrapper.style.position = "static";
 			moduleWrapper.classList.remove("hidden");

js/module.js

@@ -41,7 +41,7 @@ const Module = Class.extend({
 	 * Called when the module is started.
 	 */
 	start: async function () {
-		Log.info("Starting module: " + this.name);
+		Log.info(`Starting module: ${this.name}`);
 	},
 
 	/**
@@ -127,7 +127,7 @@ const Module = Class.extend({
 	 * @returns {string} The template string of filename.
 	 */
 	getTemplate: function () {
-		return '<div class="normal">' + this.name + '</div><div class="small dimmed">' + this.identifier + "</div>";
+		return `<div class="normal">${this.name}</div><div class="small dimmed">${this.identifier}</div>`;
 	},
 
 	/**
@@ -185,21 +185,21 @@ const Module = Class.extend({
 	 * @param {*} payload The payload of the notification.
 	 */
 	socketNotificationReceived: function (notification, payload) {
-		Log.log(this.name + " received a socket notification: " + notification + " - Payload: " + payload);
+		Log.log(`${this.name} received a socket notification: ${notification} - Payload: ${payload}`);
 	},
 
 	/**
 	 * Called when the module is hidden.
 	 */
 	suspend: function () {
-		Log.log(this.name + " is suspended.");
+		Log.log(`${this.name} is suspended.`);
 	},
 
 	/**
 	 * Called when the module is shown.
 	 */
 	resume: function () {
-		Log.log(this.name + " is resumed.");
+		Log.log(`${this.name} is resumed.`);
 	},
 
 	/*********************************************
@@ -255,7 +255,7 @@ const Module = Class.extend({
 	 * @returns {string} the file path
 	 */
 	file: function (file) {
-		return (this.data.path + "/" + file).replace("//", "/");
+		return `${this.data.path}/${file}`.replace("//", "/");
 	},
 
 	/**
@@ -491,15 +491,15 @@ Module.create = function (name) {
 
 Module.register = function (name, moduleDefinition) {
 	if (moduleDefinition.requiresVersion) {
-		Log.log("Check MagicMirror² version for module '" + name + "' - Minimum version:  " + moduleDefinition.requiresVersion + " - Current version: " + window.mmVersion);
+		Log.log(`Check MagicMirror² version for module '${name}' - Minimum version:  ${moduleDefinition.requiresVersion} - Current version: ${window.mmVersion}`);
 		if (cmpVersions(window.mmVersion, moduleDefinition.requiresVersion) >= 0) {
 			Log.log("Version is ok!");
 		} else {
-			Log.warn("Version is incorrect. Skip module: '" + name + "'");
+			Log.warn(`Version is incorrect. Skip module: '${name}'`);
 			return;
 		}
 	}
-	Log.log("Module registered: " + name);
+	Log.log(`Module registered: ${name}`);
 	Module.definitions[name] = moduleDefinition;
 };
 

js/server_functions.js

@@ -30,7 +30,7 @@ async function cors(req, res) {
 
 		const match = new RegExp(urlRegEx, "g").exec(req.url);
 		if (!match) {
-			url = "invalid url: " + req.url;
+			url = `invalid url: ${req.url}`;
 			Log.error(url);
 			res.send(url);
 		} else {
@@ -39,7 +39,7 @@ async function cors(req, res) {
 			const headersToSend = getHeadersToSend(req.url);
 			const expectedRecievedHeaders = geExpectedRecievedHeaders(req.url);
 
-			Log.log("cors url: " + url);
+			Log.log(`cors url: ${url}`);
 			const response = await fetch(url, { headers: headersToSend });
 
 			for (const header of expectedRecievedHeaders) {
@@ -62,7 +62,7 @@ async function cors(req, res) {
  * @returns {object} An object specifying name and value of the headers.
  */
 function getHeadersToSend(url) {
-	const headersToSend = { "User-Agent": "Mozilla/5.0 MagicMirror/" + global.version };
+	const headersToSend = { "User-Agent": `Mozilla/5.0 MagicMirror/${global.version}` };
 	const headersToSendMatch = new RegExp("sendheaders=(.+?)(&|$)", "g").exec(url);
 	if (headersToSendMatch) {
 		const headers = headersToSendMatch[1].split(",");

js/socketclient.js

@@ -18,8 +18,8 @@ const MMSocket = function (moduleName) {
 	if (typeof config !== "undefined" && typeof config.basePath !== "undefined") {
 		base = config.basePath;
 	}
-	this.socket = io("/" + this.moduleName, {
-		path: base + "socket.io"
+	this.socket = io(`/${this.moduleName}`, {
+		path: `${base}socket.io`
 	});
 
 	let notificationCallback = function () {};

js/translator.js

@@ -26,7 +26,7 @@ const Translator = (function () {
 						fileinfo = JSON.parse(xhr.responseText);
 					} catch (exception) {
 						// nothing here, but don't die
-						Log.error(" loading json file =" + file + " failed");
+						Log.error(` loading json file =${file} failed`);
 					}
 					resolve(fileinfo);
 				}
@@ -70,7 +70,7 @@ const Translator = (function () {
 					template = variables.fallback;
 				}
 				return template.replace(new RegExp("{([^}]+)}", "g"), function (_unused, varName) {
-					return varName in variables ? variables[varName] : "{" + varName + "}";
+					return varName in variables ? variables[varName] : `{${varName}}`;
 				});
 			}
 
@@ -123,7 +123,7 @@ const Translator = (function () {
 		 */
 		loadCoreTranslations: async function (lang) {
 			if (lang in translations) {
-				Log.log("Loading core translation file: " + translations[lang]);
+				Log.log(`Loading core translation file: ${translations[lang]}`);
 				this.coreTranslations = await loadJSON(translations[lang]);
 			} else {
 				Log.log("Configured language not found in core translations.");
@@ -139,7 +139,7 @@ const Translator = (function () {
 		loadCoreTranslationsFallback: async function () {
 			let first = Object.keys(translations)[0];
 			if (first) {
-				Log.log("Loading core translation fallback file: " + translations[first]);
+				Log.log(`Loading core translation fallback file: ${translations[first]}`);
 				this.coreTranslationsFallback = await loadJSON(translations[first]);
 			}
 		}

modules/default/alert/notificationFx.js

@@ -80,7 +80,7 @@
 	NotificationFx.prototype._init = function () {
 		// create HTML structure
 		this.ntf = document.createElement("div");
-		this.ntf.className = this.options.al_no + " ns-" + this.options.layout + " ns-effect-" + this.options.effect + " ns-type-" + this.options.type;
+		this.ntf.className = `${this.options.al_no} ns-${this.options.layout} ns-effect-${this.options.effect} ns-type-${this.options.type}`;
 		let strinner = '<div class="ns-box-inner">';
 		strinner += this.options.message;
 		strinner += "</div>";

modules/default/calendar/calendar.js

@@ -94,7 +94,7 @@ Module.register("calendar", {
 	start: function () {
 		const ONE_MINUTE = 60 * 1000;
 
-		Log.info("Starting module: " + this.name);
+		Log.info(`Starting module: ${this.name}`);
 
 		if (this.config.colored) {
 			Log.warn("Your are using the deprecated config values 'colored'. Please switch to  'coloredSymbol' & 'coloredText'!");
@@ -203,13 +203,13 @@ Module.register("calendar", {
 
 		if (this.error) {
 			wrapper.innerHTML = this.error;
-			wrapper.className = this.config.tableClass + " dimmed";
+			wrapper.className = `${this.config.tableClass} dimmed`;
 			return wrapper;
 		}
 
 		if (events.length === 0) {
 			wrapper.innerHTML = this.loaded ? this.translate("EMPTY") : this.translate("LOADING");
-			wrapper.className = this.config.tableClass + " dimmed";
+			wrapper.className = `${this.config.tableClass} dimmed`;
 			return wrapper;
 		}
 
@@ -259,7 +259,7 @@ Module.register("calendar", {
 			const eventWrapper = document.createElement("tr");
 
 			if (this.config.coloredText) {
-				eventWrapper.style.cssText = "color:" + this.colorForUrl(event.url, false);
+				eventWrapper.style.cssText = `color:${this.colorForUrl(event.url, false)}`;
 			}
 
 			if (this.config.coloredBackground) {
@@ -281,11 +281,11 @@ Module.register("calendar", {
 
 			if (this.config.displaySymbol) {
 				if (this.config.coloredSymbol) {
-					symbolWrapper.style.cssText = "color:" + this.colorForUrl(event.url, false);
+					symbolWrapper.style.cssText = `color:${this.colorForUrl(event.url, false)}`;
 				}
 
 				const symbolClass = this.symbolClassForUrl(event.url);
-				symbolWrapper.className = "symbol align-right " + symbolClass;
+				symbolWrapper.className = `symbol align-right ${symbolClass}`;
 
 				const symbols = this.symbolsForEvent(event);
 				symbols.forEach((s, index) => {
@@ -313,7 +313,7 @@ Module.register("calendar", {
 					const thisYear = new Date(parseInt(event.startDate)).getFullYear(),
 						yearDiff = thisYear - event.firstYear;
 
-					repeatingCountTitle = ", " + yearDiff + ". " + repeatingCountTitle;
+					repeatingCountTitle = `, ${yearDiff}. ${repeatingCountTitle}`;
 				}
 			}
 
@@ -325,11 +325,11 @@ Module.register("calendar", {
 						if (needle.test(event.title)) {
 							// Respect parameter ColoredSymbolOnly also for custom events
 							if (this.config.coloredText) {
-								eventWrapper.style.cssText = "color:" + this.config.customEvents[ev].color;
-								titleWrapper.style.cssText = "color:" + this.config.customEvents[ev].color;
+								eventWrapper.style.cssText = `color:${this.config.customEvents[ev].color}`;
+								titleWrapper.style.cssText = `color:${this.config.customEvents[ev].color}`;
 							}
 							if (this.config.displaySymbol && this.config.coloredSymbol) {
-								symbolWrapper.style.cssText = "color:" + this.config.customEvents[ev].color;
+								symbolWrapper.style.cssText = `color:${this.config.customEvents[ev].color}`;
 							}
 							break;
 						}
@@ -342,9 +342,9 @@ Module.register("calendar", {
 			const titleClass = this.titleClassForUrl(event.url);
 
 			if (!this.config.coloredText) {
-				titleWrapper.className = "title bright " + titleClass;
+				titleWrapper.className = `title bright ${titleClass}`;
 			} else {
-				titleWrapper.className = "title " + titleClass;
+				titleWrapper.className = `title ${titleClass}`;
 			}
 
 			if (this.config.timeFormat === "dateheaders") {
@@ -355,14 +355,14 @@ Module.register("calendar", {
 					titleWrapper.classList.add("align-left");
 				} else {
 					const timeWrapper = document.createElement("td");
-					timeWrapper.className = "time light " + (this.config.flipDateHeaderTitle ? "align-right " : "align-left ") + this.timeClassForUrl(event.url);
+					timeWrapper.className = `time light ${this.config.flipDateHeaderTitle ? "align-right " : "align-left "}${this.timeClassForUrl(event.url)}`;
 					timeWrapper.style.paddingLeft = "2px";
 					timeWrapper.style.textAlign = this.config.flipDateHeaderTitle ? "right" : "left";
 					timeWrapper.innerHTML = moment(event.startDate, "x").format("LT");
 
 					// Add endDate to dataheaders if showEnd is enabled
 					if (this.config.showEnd) {
-						timeWrapper.innerHTML += " - " + this.capFirst(moment(event.endDate, "x").format("LT"));
+						timeWrapper.innerHTML += ` - ${this.capFirst(moment(event.endDate, "x").format("LT"))}`;
 					}
 
 					eventWrapper.appendChild(timeWrapper);
@@ -393,7 +393,7 @@ Module.register("calendar", {
 						// Ongoing and getRelative is set
 						timeWrapper.innerHTML = this.capFirst(
 							this.translate("RUNNING", {
-								fallback: this.translate("RUNNING") + " {timeUntilEnd}",
+								fallback: `${this.translate("RUNNING")} {timeUntilEnd}`,
 								timeUntilEnd: moment(event.endDate, "x").fromNow(true)
 							})
 						);
@@ -424,8 +424,8 @@ Module.register("calendar", {
 						} else {
 							timeWrapper.innerHTML = this.capFirst(
 								moment(event.startDate, "x").calendar(null, {
-									sameDay: this.config.showTimeToday ? "LT" : "[" + this.translate("TODAY") + "]",
-									nextDay: "[" + this.translate("TOMORROW") + "]",
+									sameDay: this.config.showTimeToday ? "LT" : `[${this.translate("TODAY")}]`,
+									nextDay: `[${this.translate("TOMORROW")}]`,
 									nextWeek: "dddd",
 									sameElse: event.fullDayEvent ? this.config.fullDayEventDateFormat : this.config.dateFormat
 								})
@@ -456,13 +456,13 @@ Module.register("calendar", {
 						// Ongoing event
 						timeWrapper.innerHTML = this.capFirst(
 							this.translate("RUNNING", {
-								fallback: this.translate("RUNNING") + " {timeUntilEnd}",
+								fallback: `${this.translate("RUNNING")} {timeUntilEnd}`,
 								timeUntilEnd: moment(event.endDate, "x").fromNow(true)
 							})
 						);
 					}
 				}
-				timeWrapper.className = "time light " + this.timeClassForUrl(event.url);
+				timeWrapper.className = `time light ${this.timeClassForUrl(event.url)}`;
 				eventWrapper.appendChild(timeWrapper);
 			}
 
@@ -489,7 +489,7 @@ Module.register("calendar", {
 					}
 
 					if (this.config.coloredText) {
-						locationRow.style.cssText = "color:" + this.colorForUrl(event.url, false);
+						locationRow.style.cssText = `color:${this.colorForUrl(event.url, false)}`;
 					}
 
 					if (this.config.coloredBackground) {
@@ -619,7 +619,7 @@ Module.register("calendar", {
 						thisEvent.today = thisEvent.startDate >= today && thisEvent.startDate < today + ONE_DAY;
 						thisEvent.tomorrow = !thisEvent.today && thisEvent.startDate >= today + ONE_DAY && thisEvent.startDate < today + 2 * ONE_DAY;
 						thisEvent.endDate = midnight;
-						thisEvent.title += " (" + count + "/" + maxCount + ")";
+						thisEvent.title += ` (${count}/${maxCount})`;
 						splitEvents.push(thisEvent);
 
 						event.startDate = midnight;
@@ -627,7 +627,7 @@ Module.register("calendar", {
 						midnight = moment(midnight, "x").add(1, "day").format("x"); // next day
 					}
 					// Last day
-					event.title += " (" + count + "/" + maxCount + ")";
+					event.title += ` (${count}/${maxCount})`;
 					event.today += event.startDate >= today && event.startDate < today + ONE_DAY;
 					event.tomorrow = !event.today && event.startDate >= today + ONE_DAY && event.startDate < today + 2 * ONE_DAY;
 					splitEvents.push(event);
@@ -894,7 +894,7 @@ Module.register("calendar", {
 				const word = words[i];
 				if (currentLine.length + word.length < (typeof maxLength === "number" ? maxLength : 25) - 1) {
 					// max - 1 to account for a space
-					currentLine += word + " ";
+					currentLine += `${word} `;
 				} else {
 					line++;
 					if (line > maxTitleLines - 1) {
@@ -905,9 +905,9 @@ Module.register("calendar", {
 					}
 
 					if (currentLine.length > 0) {
-						temp += currentLine + "<br>" + word + " ";
+						temp += `${currentLine}<br>${word} `;
 					} else {
-						temp += word + "<br>";
+						temp += `${word}<br>`;
 					}
 					currentLine = "";
 				}
@@ -916,7 +916,7 @@ Module.register("calendar", {
 			return (temp + currentLine).trim();
 		} else {
 			if (maxLength && typeof maxLength === "number" && string.length > maxLength) {
-				return string.trim().slice(0, maxLength) + "…";
+				return `${string.trim().slice(0, maxLength)}…`;
 			} else {
 				return string.trim();
 			}

modules/default/calendar/calendarfetcher.js

@@ -41,7 +41,7 @@ const CalendarFetcher = function (url, reloadInterval, excludedEvents, maximumEn
 		let fetcher = null;
 		let httpsAgent = null;
 		let headers = {
-			"User-Agent": "Mozilla/5.0 (Node.js " + nodeVersion + ") MagicMirror/" + global.version
+			"User-Agent": `Mozilla/5.0 (Node.js ${nodeVersion}) MagicMirror/${global.version}`
 		};
 
 		if (selfSignedCert) {
@@ -51,11 +51,11 @@ const CalendarFetcher = function (url, reloadInterval, excludedEvents, maximumEn
 		}
 		if (auth) {
 			if (auth.method === "bearer") {
-				headers.Authorization = "Bearer " + auth.pass;
+				headers.Authorization = `Bearer ${auth.pass}`;
 			} else if (auth.method === "digest") {
 				fetcher = new digest(auth.user, auth.pass).fetch(url, { headers: headers, agent: httpsAgent });
 			} else {
-				headers.Authorization = "Basic " + Buffer.from(auth.user + ":" + auth.pass).toString("base64");
+				headers.Authorization = `Basic ${Buffer.from(`${auth.user}:${auth.pass}`).toString("base64")}`;
 			}
 		}
 		if (fetcher === null) {
@@ -70,7 +70,7 @@ const CalendarFetcher = function (url, reloadInterval, excludedEvents, maximumEn
 
 				try {
 					data = ical.parseICS(responseData);
-					Log.debug("parsed data=" + JSON.stringify(data));
+					Log.debug(`parsed data=${JSON.stringify(data)}`);
 					events = CalendarUtils.filterEvents(data, {
 						excludedEvents,
 						includePastEvents,
@@ -114,7 +114,7 @@ const CalendarFetcher = function (url, reloadInterval, excludedEvents, maximumEn
 	 * Broadcast the existing events.
 	 */
 	this.broadcastEvents = function () {
-		Log.info("Calendar-Fetcher: Broadcasting " + events.length + " events.");
+		Log.info(`Calendar-Fetcher: Broadcasting ${events.length} events.`);
 		eventsReceivedCallback(this);
 	};
 

modules/default/calendar/calendarutils.js

@@ -29,7 +29,7 @@ const CalendarUtils = {
 			Log.debug(" if no tz, guess based on now");
 			event.start.tz = moment.tz.guess();
 		}
-		Log.debug("initial tz=" + event.start.tz);
+		Log.debug(`initial tz=${event.start.tz}`);
 
 		// if there is a start date specified
 		if (event.start.tz) {
@@ -37,7 +37,7 @@ const CalendarUtils = {
 			if (event.start.tz.includes(" ")) {
 				// use the lookup table to get theIANA name as moment and date don't know MS timezones
 				let tz = CalendarUtils.getIanaTZFromMS(event.start.tz);
-				Log.debug("corrected TZ=" + tz);
+				Log.debug(`corrected TZ=${tz}`);
 				// watch out for unregistered windows timezone names
 				// if we had a successful lookup
 				if (tz) {
@@ -46,7 +46,7 @@ const CalendarUtils = {
 					// Log.debug("corrected timezone="+event.start.tz)
 				}
 			}
-			Log.debug("corrected tz=" + event.start.tz);
+			Log.debug(`corrected tz=${event.start.tz}`);
 			let current_offset = 0; // offset  from TZ string or calculated
 			let mm = 0; // date with tz or offset
 			let start_offset = 0; // utc offset of created with tz
@@ -57,18 +57,18 @@ const CalendarUtils = {
 				let start_offset = parseInt(start_offsetString[0]);
 				start_offset *= event.start.tz[1] === "-" ? -1 : 1;
 				adjustHours = start_offset;
-				Log.debug("defined offset=" + start_offset + " hours");
+				Log.debug(`defined offset=${start_offset} hours`);
 				current_offset = start_offset;
 				event.start.tz = "";
-				Log.debug("ical offset=" + current_offset + " date=" + date);
+				Log.debug(`ical offset=${current_offset} date=${date}`);
 				mm = moment(date);
 				let x = parseInt(moment(new Date()).utcOffset());
-				Log.debug("net mins=" + (current_offset * 60 - x));
+				Log.debug(`net mins=${current_offset * 60 - x}`);
 
 				mm = mm.add(x - current_offset * 60, "minutes");
 				adjustHours = (current_offset * 60 - x) / 60;
 				event.start = mm.toDate();
-				Log.debug("adjusted date=" + event.start);
+				Log.debug(`adjusted date=${event.start}`);
 			} else {
 				// get the start time in that timezone
 				let es = moment(event.start);
@@ -76,18 +76,18 @@ const CalendarUtils = {
 				if (es.format("YYYY") < 2007) {
 					es.set("year", 2013); // if so, use a closer date
 				}
-				Log.debug("start date/time=" + es.toDate());
+				Log.debug(`start date/time=${es.toDate()}`);
 				start_offset = moment.tz(es, event.start.tz).utcOffset();
-				Log.debug("start offset=" + start_offset);
+				Log.debug(`start offset=${start_offset}`);
 
-				Log.debug("start date/time w tz =" + moment.tz(moment(event.start), event.start.tz).toDate());
+				Log.debug(`start date/time w tz =${moment.tz(moment(event.start), event.start.tz).toDate()}`);
 
 				// get the specified date in that timezone
 				mm = moment.tz(moment(date), event.start.tz);
-				Log.debug("event date=" + mm.toDate());
+				Log.debug(`event date=${mm.toDate()}`);
 				current_offset = mm.utcOffset();
 			}
-			Log.debug("event offset=" + current_offset + " hour=" + mm.format("H") + " event date=" + mm.toDate());
+			Log.debug(`event offset=${current_offset} hour=${mm.format("H")} event date=${mm.toDate()}`);
 
 			// if the offset is greater than 0, east of london
 			if (current_offset !== start_offset) {
@@ -113,7 +113,7 @@ const CalendarUtils = {
 				}
 			}
 		}
-		Log.debug("adjustHours=" + adjustHours);
+		Log.debug(`adjustHours=${adjustHours}`);
 		return adjustHours;
 	},
 
@@ -138,7 +138,7 @@ const CalendarUtils = {
 			return CalendarUtils.isFullDayEvent(event) ? moment(event[time], "YYYYMMDD") : moment(new Date(event[time]));
 		};
 
-		Log.debug("There are " + Object.entries(data).length + " calendar entries.");
+		Log.debug(`There are ${Object.entries(data).length} calendar entries.`);
 		Object.entries(data).forEach(([key, event]) => {
 			Log.debug("Processing entry...");
 			const now = new Date();
@@ -160,7 +160,7 @@ const CalendarUtils = {
 			}
 
 			if (event.type === "VEVENT") {
-				Log.debug("Event:\n" + JSON.stringify(event));
+				Log.debug(`Event:\n${JSON.stringify(event)}`);
 				let startDate = eventDate(event, "start");
 				let endDate;
 
@@ -177,12 +177,12 @@ const CalendarUtils = {
 					}
 				}
 
-				Log.debug("start: " + startDate.toDate());
-				Log.debug("end:: " + endDate.toDate());
+				Log.debug(`start: ${startDate.toDate()}`);
+				Log.debug(`end:: ${endDate.toDate()}`);
 
 				// Calculate the duration of the event for use with recurring events.
 				let duration = parseInt(endDate.format("x")) - parseInt(startDate.format("x"));
-				Log.debug("duration: " + duration);
+				Log.debug(`duration: ${duration}`);
 
 				// FIXME: Since the parsed json object from node-ical comes with time information
 				// this check could be removed (?)
@@ -191,7 +191,7 @@ const CalendarUtils = {
 				}
 
 				const title = CalendarUtils.getTitleFromEvent(event);
-				Log.debug("title: " + title);
+				Log.debug(`title: ${title}`);
 
 				let excluded = false,
 					dateFilter = null;
@@ -271,8 +271,8 @@ const CalendarUtils = {
 						pastLocal = pastMoment.toDate();
 						futureLocal = futureMoment.toDate();
 
-						Log.debug("pastLocal: " + pastLocal);
-						Log.debug("futureLocal: " + futureLocal);
+						Log.debug(`pastLocal: ${pastLocal}`);
+						Log.debug(`futureLocal: ${futureLocal}`);
 					} else {
 						// if we want past events
 						if (config.includePastEvents) {
@@ -284,9 +284,9 @@ const CalendarUtils = {
 						}
 						futureLocal = futureMoment.toDate(); // future
 					}
-					Log.debug("Search for recurring events between: " + pastLocal + " and " + futureLocal);
+					Log.debug(`Search for recurring events between: ${pastLocal} and ${futureLocal}`);
 					const dates = rule.between(pastLocal, futureLocal, true, limitFunction);
-					Log.debug("Title: " + event.summary + ", with dates: " + JSON.stringify(dates));
+					Log.debug(`Title: ${event.summary}, with dates: ${JSON.stringify(dates)}`);
 					// The "dates" array contains the set of dates within our desired date range range that are valid
 					// for the recurrence rule. *However*, it's possible for us to have a specific recurrence that
 					// had its date changed from outside the range to inside the range.  For the time being,
@@ -294,7 +294,7 @@ const CalendarUtils = {
 					// because the logic below will filter out any recurrences that don't actually belong within
 					// our display range.
 					// Would be great if there was a better way to handle this.
-					Log.debug("event.recurrences: " + event.recurrences);
+					Log.debug(`event.recurrences: ${event.recurrences}`);
 					if (event.recurrences !== undefined) {
 						for (let r in event.recurrences) {
 							// Only add dates that weren't already in the range we added from the rrule so that
@@ -323,10 +323,10 @@ const CalendarUtils = {
 						let dateoffset = date.getTimezoneOffset();
 
 						// Reduce the time by the following offset.
-						Log.debug(" recurring date is " + date + " offset is " + dateoffset);
+						Log.debug(` recurring date is ${date} offset is ${dateoffset}`);
 
 						let dh = moment(date).format("HH");
-						Log.debug(" recurring date is " + date + " offset is " + dateoffset / 60 + " Hour is " + dh);
+						Log.debug(` recurring date is ${date} offset is ${dateoffset / 60} Hour is ${dh}`);
 
 						if (CalendarUtils.isFullDayEvent(event)) {
 							Log.debug("Fullday");
@@ -342,7 +342,7 @@ const CalendarUtils = {
 									// the duration was calculated way back at the top before we could correct the start time..
 									// fix it for this event entry
 									//duration = 24 * 60 * 60 * 1000;
-									Log.debug("new recurring date1 fulldate is " + date);
+									Log.debug(`new recurring date1 fulldate is ${date}`);
 								}
 							} else {
 								// if the timezones are the same, correct date if needed
@@ -357,7 +357,7 @@ const CalendarUtils = {
 									// the duration was calculated way back at the top before we could correct the start time..
 									// fix it for this event entry
 									//duration = 24 * 60 * 60 * 1000;
-									Log.debug("new recurring date2 fulldate is " + date);
+									Log.debug(`new recurring date2 fulldate is ${date}`);
 								}
 								//}
 							}
@@ -376,7 +376,7 @@ const CalendarUtils = {
 									// the duration was calculated way back at the top before we could correct the start time..
 									// fix it for this event entry
 									//duration = 24 * 60 * 60 * 1000;
-									Log.debug("new recurring date1 is " + date);
+									Log.debug(`new recurring date1 is ${date}`);
 								}
 							} else {
 								// if the timezones are the same, correct date if needed
@@ -391,13 +391,13 @@ const CalendarUtils = {
 									// the duration was calculated way back at the top before we could correct the start time..
 									// fix it for this event entry
 									//duration = 24 * 60 * 60 * 1000;
-									Log.debug("new recurring date2 is " + date);
+									Log.debug(`new recurring date2 is ${date}`);
 								}
 								//}
 							}
 						}
 						startDate = moment(date);
-						Log.debug("Corrected startDate: " + startDate.toDate());
+						Log.debug(`Corrected startDate: ${startDate.toDate()}`);
 
 						let adjustDays = CalendarUtils.calculateTimezoneAdjustment(event, date);
 
@@ -413,7 +413,7 @@ const CalendarUtils = {
 							// This date is an exception date, which means we should skip it in the recurrence pattern.
 							showRecurrence = false;
 						}
-						Log.debug("duration: " + duration);
+						Log.debug(`duration: ${duration}`);
 
 						endDate = moment(parseInt(startDate.format("x")) + duration, "x");
 						if (startDate.format("x") === endDate.format("x")) {
@@ -433,7 +433,7 @@ const CalendarUtils = {
 						}
 
 						if (showRecurrence === true) {
-							Log.debug("saving event: " + description);
+							Log.debug(`saving event: ${description}`);
 							addedEvents++;
 							newEvents.push({
 								title: recurrenceTitle,
@@ -573,7 +573,7 @@ const CalendarUtils = {
 		if (filter) {
 			const until = filter.split(" "),
 				value = parseInt(until[0]),
-				increment = until[1].slice(-1) === "s" ? until[1] : until[1] + "s", // Massage the data for moment js
+				increment = until[1].slice(-1) === "s" ? until[1] : `${until[1]}s`, // Massage the data for moment js
 				filterUntil = moment(endDate.format()).subtract(value, increment);
 
 			return now < filterUntil.format("x");

modules/default/calendar/node_helper.js

@@ -11,7 +11,7 @@ const Log = require("logger");
 module.exports = NodeHelper.create({
 	// Override start method.
 	start: function () {
-		Log.log("Starting node helper for: " + this.name);
+		Log.log(`Starting node helper for: ${this.name}`);
 		this.fetchers = [];
 	},
 
@@ -55,7 +55,7 @@ module.exports = NodeHelper.create({
 
 		let fetcher;
 		if (typeof this.fetchers[identifier + url] === "undefined") {
-			Log.log("Create new calendarfetcher for url: " + url + " - Interval: " + fetchInterval);
+			Log.log(`Create new calendarfetcher for url: ${url} - Interval: ${fetchInterval}`);
 			fetcher = new CalendarFetcher(url, fetchInterval, excludedEvents, maximumEntries, maximumNumberOfDays, auth, broadcastPastEvents, selfSignedCert);
 
 			fetcher.onReceive((fetcher) => {
@@ -73,7 +73,7 @@ module.exports = NodeHelper.create({
 
 			this.fetchers[identifier + url] = fetcher;
 		} else {
-			Log.log("Use existing calendarfetcher for url: " + url);
+			Log.log(`Use existing calendarfetcher for url: ${url}`);
 			fetcher = this.fetchers[identifier + url];
 			fetcher.broadcastEvents();
 		}

modules/default/clock/clock.js

@@ -45,7 +45,7 @@ Module.register("clock", {
 	},
 	// Define start sequence.
 	start: function () {
-		Log.info("Starting module: " + this.name);
+		Log.info(`Starting module: ${this.name}`);
 
 		// Schedule update interval.
 		this.second = moment().second();
@@ -137,9 +137,9 @@ Module.register("clock", {
 		}
 
 		if (this.config.clockBold) {
-			timeString = now.format(hourSymbol + '[<span class="bold">]mm[</span>]');
+			timeString = now.format(`${hourSymbol}[<span class="bold">]mm[</span>]`);
 		} else {
-			timeString = now.format(hourSymbol + ":mm");
+			timeString = now.format(`${hourSymbol}:mm`);
 		}
 
 		if (this.config.showDate) {
@@ -172,7 +172,7 @@ Module.register("clock", {
 		 * @returns {string} The formatted time string
 		 */
 		function formatTime(config, time) {
-			let formatString = hourSymbol + ":mm";
+			let formatString = `${hourSymbol}:mm`;
 			if (config.showPeriod && config.timeFormat !== 24) {
 				formatString += config.showPeriodUpper ? "A" : "a";
 			}
@@ -195,19 +195,11 @@ Module.register("clock", {
 				nextEvent = tomorrowSunTimes.sunrise;
 			}
 			const untilNextEvent = moment.duration(moment(nextEvent).diff(now));
-			const untilNextEventString = untilNextEvent.hours() + "h " + untilNextEvent.minutes() + "m";
+			const untilNextEventString = `${untilNextEvent.hours()}h ${untilNextEvent.minutes()}m`;
 			sunWrapper.innerHTML =
-				'<span class="' +
-				(isVisible ? "bright" : "") +
-				'"><i class="fas fa-sun" aria-hidden="true"></i> ' +
-				untilNextEventString +
-				"</span>" +
-				'<span><i class="fas fa-arrow-up" aria-hidden="true"></i> ' +
-				formatTime(this.config, sunTimes.sunrise) +
-				"</span>" +
-				'<span><i class="fas fa-arrow-down" aria-hidden="true"></i> ' +
-				formatTime(this.config, sunTimes.sunset) +
-				"</span>";
+				`<span class="${isVisible ? "bright" : ""}"><i class="fas fa-sun" aria-hidden="true"></i> ${untilNextEventString}</span>` +
+				`<span><i class="fas fa-arrow-up" aria-hidden="true"></i> ${formatTime(this.config, sunTimes.sunrise)}</span>` +
+				`<span><i class="fas fa-arrow-down" aria-hidden="true"></i> ${formatTime(this.config, sunTimes.sunset)}</span>`;
 			digitalWrapper.appendChild(sunWrapper);
 		}
 
@@ -226,19 +218,11 @@ Module.register("clock", {
 				moonSet = nextMoonTimes.set;
 			}
 			const isVisible = now.isBetween(moonRise, moonSet) || moonTimes.alwaysUp === true;
-			const illuminatedFractionString = Math.round(moonIllumination.fraction * 100) + "%";
+			const illuminatedFractionString = `${Math.round(moonIllumination.fraction * 100)}%`;
 			moonWrapper.innerHTML =
-				'<span class="' +
-				(isVisible ? "bright" : "") +
-				'"><i class="fas fa-moon" aria-hidden="true"></i> ' +
-				illuminatedFractionString +
-				"</span>" +
-				'<span><i class="fas fa-arrow-up" aria-hidden="true"></i> ' +
-				(moonRise ? formatTime(this.config, moonRise) : "...") +
-				"</span>" +
-				'<span><i class="fas fa-arrow-down" aria-hidden="true"></i> ' +
-				(moonSet ? formatTime(this.config, moonSet) : "...") +
-				"</span>";
+				`<span class="${isVisible ? "bright" : ""}"><i class="fas fa-moon" aria-hidden="true"></i> ${illuminatedFractionString}</span>` +
+				`<span><i class="fas fa-arrow-up" aria-hidden="true"></i> ${moonRise ? formatTime(this.config, moonRise) : "..."}</span>` +
+				`<span><i class="fas fa-arrow-down" aria-hidden="true"></i> ${moonSet ? formatTime(this.config, moonSet) : "..."}</span>`;
 			digitalWrapper.appendChild(moonWrapper);
 		}
 
@@ -266,7 +250,7 @@ Module.register("clock", {
 			analogWrapper.style.height = this.config.analogSize;
 
 			if (this.config.analogFace !== "" && this.config.analogFace !== "simple" && this.config.analogFace !== "none") {
-				analogWrapper.style.background = "url(" + this.data.path + "faces/" + this.config.analogFace + ".svg)";
+				analogWrapper.style.background = `url(${this.data.path}faces/${this.config.analogFace}.svg)`;
 				analogWrapper.style.backgroundSize = "100%";
 
 				// The following line solves issue: https://github.com/MichMich/MagicMirror/issues/611
@@ -280,11 +264,11 @@ Module.register("clock", {
 
 			const clockHour = document.createElement("div");
 			clockHour.id = "clock-hour";
-			clockHour.style.transform = "rotate(" + hour + "deg)";
+			clockHour.style.transform = `rotate(${hour}deg)`;
 			clockHour.className = "clock-hour";
 			const clockMinute = document.createElement("div");
 			clockMinute.id = "clock-minute";
-			clockMinute.style.transform = "rotate(" + minute + "deg)";
+			clockMinute.style.transform = `rotate(${minute}deg)`;
 			clockMinute.className = "clock-minute";
 
 			// Combine analog wrappers
@@ -294,7 +278,7 @@ Module.register("clock", {
 			if (this.config.displaySeconds) {
 				const clockSecond = document.createElement("div");
 				clockSecond.id = "clock-second";
-				clockSecond.style.transform = "rotate(" + second + "deg)";
+				clockSecond.style.transform = `rotate(${second}deg)`;
 				clockSecond.className = "clock-second";
 				clockSecond.style.backgroundColor = this.config.secondsColor;
 				clockFace.appendChild(clockSecond);
@@ -316,7 +300,7 @@ Module.register("clock", {
 		} else if (this.config.displayType === "digital") {
 			wrapper.appendChild(digitalWrapper);
 		} else if (this.config.displayType === "both") {
-			wrapper.classList.add("clock-grid-" + this.config.analogPlacement);
+			wrapper.classList.add(`clock-grid-${this.config.analogPlacement}`);
 			wrapper.appendChild(analogWrapper);
 			wrapper.appendChild(digitalWrapper);
 		}

modules/default/compliments/compliments.js

@@ -34,7 +34,7 @@ Module.register("compliments", {
 
 	// Define start sequence.
 	start: async function () {
-		Log.info("Starting module: " + this.name);
+		Log.info(`Starting module: ${this.name}`);
 
 		this.lastComplimentIndex = -1;
 

modules/default/newsfeed/newsfeed.js

@@ -44,7 +44,7 @@ Module.register("newsfeed", {
 
 	getUrlPrefix: function (item) {
 		if (item.useCorsProxy) {
-			return location.protocol + "//" + location.host + "/cors?url=";
+			return `${location.protocol}//${location.host}/cors?url=`;
 		} else {
 			return "";
 		}
@@ -70,7 +70,7 @@ Module.register("newsfeed", {
 
 	// Define start sequence.
 	start: function () {
-		Log.info("Starting module: " + this.name);
+		Log.info(`Starting module: ${this.name}`);
 
 		// Set locale.
 		moment.locale(config.language);
@@ -346,7 +346,7 @@ Module.register("newsfeed", {
 				this.activeItem = 0;
 			}
 			this.resetDescrOrFullArticleAndTimer();
-			Log.debug(this.name + " - going from article #" + before + " to #" + this.activeItem + " (of " + this.newsItems.length + ")");
+			Log.debug(`${this.name} - going from article #${before} to #${this.activeItem} (of ${this.newsItems.length})`);
 			this.updateDom(100);
 		} else if (notification === "ARTICLE_PREVIOUS") {
 			this.activeItem--;
@@ -354,7 +354,7 @@ Module.register("newsfeed", {
 				this.activeItem = this.newsItems.length - 1;
 			}
 			this.resetDescrOrFullArticleAndTimer();
-			Log.debug(this.name + " - going from article #" + before + " to #" + this.activeItem + " (of " + this.newsItems.length + ")");
+			Log.debug(`${this.name} - going from article #${before} to #${this.activeItem} (of ${this.newsItems.length})`);
 			this.updateDom(100);
 		}
 		// if "more details" is received the first time: show article summary, on second time show full article
@@ -363,8 +363,8 @@ Module.register("newsfeed", {
 			if (this.config.showFullArticle === true) {
 				this.scrollPosition += this.config.scrollLength;
 				window.scrollTo(0, this.scrollPosition);
-				Log.debug(this.name + " - scrolling down");
-				Log.debug(this.name + " - ARTICLE_MORE_DETAILS, scroll position: " + this.config.scrollLength);
+				Log.debug(`${this.name} - scrolling down`);
+				Log.debug(`${this.name} - ARTICLE_MORE_DETAILS, scroll position: ${this.config.scrollLength}`);
 			} else {
 				this.showFullArticle();
 			}
@@ -372,12 +372,12 @@ Module.register("newsfeed", {
 			if (this.config.showFullArticle === true) {
 				this.scrollPosition -= this.config.scrollLength;
 				window.scrollTo(0, this.scrollPosition);
-				Log.debug(this.name + " - scrolling up");
-				Log.debug(this.name + " - ARTICLE_SCROLL_UP, scroll position: " + this.config.scrollLength);
+				Log.debug(`${this.name} - scrolling up`);
+				Log.debug(`${this.name} - ARTICLE_SCROLL_UP, scroll position: ${this.config.scrollLength}`);
 			}
 		} else if (notification === "ARTICLE_LESS_DETAILS") {
 			this.resetDescrOrFullArticleAndTimer();
-			Log.debug(this.name + " - showing only article titles again");
+			Log.debug(`${this.name} - showing only article titles again`);
 			this.updateDom(100);
 		} else if (notification === "ARTICLE_TOGGLE_FULL") {
 			if (this.config.showFullArticle) {
@@ -406,7 +406,7 @@ Module.register("newsfeed", {
 		}
 		clearInterval(this.timer);
 		this.timer = null;
-		Log.debug(this.name + " - showing " + this.isShowingDescription ? "article description" : "full article");
+		Log.debug(`${this.name} - showing ${this.isShowingDescription ? "article description" : "full article"}`);
 		this.updateDom(100);
 	}
 });

modules/default/newsfeed/newsfeedfetcher.js

@@ -64,9 +64,9 @@ const NewsfeedFetcher = function (url, reloadInterval, encoding, logFeedWarnings
 			} else if (logFeedWarnings) {
 				Log.warn("Can't parse feed item:");
 				Log.warn(item);
-				Log.warn("Title: " + title);
-				Log.warn("Description: " + description);
-				Log.warn("Pubdate: " + pubdate);
+				Log.warn(`Title: ${title}`);
+				Log.warn(`Description: ${description}`);
+				Log.warn(`Pubdate: ${pubdate}`);
 			}
 		});
 
@@ -90,16 +90,16 @@ const NewsfeedFetcher = function (url, reloadInterval, encoding, logFeedWarnings
 				const ttlms = Math.min(minutes * 60 * 1000, 86400000);
 				if (ttlms > reloadInterval) {
 					reloadInterval = ttlms;
-					Log.info("Newsfeed-Fetcher: reloadInterval set to ttl=" + reloadInterval + " for url " + url);
+					Log.info(`Newsfeed-Fetcher: reloadInterval set to ttl=${reloadInterval} for url ${url}`);
 				}
 			} catch (error) {
-				Log.warn("Newsfeed-Fetcher: feed ttl is no valid integer=" + minutes + " for url " + url);
+				Log.warn(`Newsfeed-Fetcher: feed ttl is no valid integer=${minutes} for url ${url}`);
 			}
 		});
 
 		const nodeVersion = Number(process.version.match(/^v(\d+\.\d+)/)[1]);
 		const headers = {
-			"User-Agent": "Mozilla/5.0 (Node.js " + nodeVersion + ") MagicMirror/" + global.version,
+			"User-Agent": `Mozilla/5.0 (Node.js ${nodeVersion}) MagicMirror/${global.version}`,
 			"Cache-Control": "max-age=0, no-cache, no-store, must-revalidate",
 			Pragma: "no-cache"
 		};
@@ -159,7 +159,7 @@ const NewsfeedFetcher = function (url, reloadInterval, encoding, logFeedWarnings
 			Log.info("Newsfeed-Fetcher: No items to broadcast yet.");
 			return;
 		}
-		Log.info("Newsfeed-Fetcher: Broadcasting " + items.length + " items.");
+		Log.info(`Newsfeed-Fetcher: Broadcasting ${items.length} items.`);
 		itemsReceivedCallback(this);
 	};
 

modules/default/newsfeed/node_helper.js

@@ -12,7 +12,7 @@ const Log = require("logger");
 module.exports = NodeHelper.create({
 	// Override start method.
 	start: function () {
-		Log.log("Starting node helper for: " + this.name);
+		Log.log(`Starting node helper for: ${this.name}`);
 		this.fetchers = [];
 	},
 
@@ -47,7 +47,7 @@ module.exports = NodeHelper.create({
 
 		let fetcher;
 		if (typeof this.fetchers[url] === "undefined") {
-			Log.log("Create new newsfetcher for url: " + url + " - Interval: " + reloadInterval);
+			Log.log(`Create new newsfetcher for url: ${url} - Interval: ${reloadInterval}`);
 			fetcher = new NewsfeedFetcher(url, reloadInterval, encoding, config.logFeedWarnings, useCorsProxy);
 
 			fetcher.onReceive(() => {
@@ -64,7 +64,7 @@ module.exports = NodeHelper.create({
 
 			this.fetchers[url] = fetcher;
 		} else {
-			Log.log("Use existing newsfetcher for url: " + url);
+			Log.log(`Use existing newsfetcher for url: ${url}`);
 			fetcher = this.fetchers[url];
 			fetcher.setReloadInterval(reloadInterval);
 			fetcher.broadcastItems();

modules/default/updatenotification/git_helper.js

@@ -131,7 +131,7 @@ class GitHelper {
 
 		// this is the default if there was no match from "git fetch -n --dry-run".
 		// Its a fallback because if there was a real "git fetch", the above "git fetch -n --dry-run" would deliver nothing.
-		let refDiff = gitInfo.current + "..origin/" + gitInfo.current;
+		let refDiff = `${gitInfo.current}..origin/${gitInfo.current}`;
 		if (matches && matches[0]) {
 			refDiff = matches[0];
 		}

modules/default/weather/providers/envcanada.js

@@ -138,7 +138,7 @@ WeatherProvider.register("envcanada", {
 	// being accessed. This is only pertinent when using the EC data elements that contain a textual forecast.
 	//
 	getUrl() {
-		return "https://dd.weather.gc.ca/citypage_weather/xml/" + this.config.provCode + "/" + this.config.siteCode + "_e.xml";
+		return `https://dd.weather.gc.ca/citypage_weather/xml/${this.config.provCode}/${this.config.siteCode}_e.xml`;
 	},
 
 	//

modules/default/weather/providers/openmeteo.js

@@ -264,9 +264,9 @@ WeatherProvider.register("openmeteo", {
 				switch (key) {
 					case "hourly":
 					case "daily":
-						return encodeURIComponent(key) + "=" + params[key].join(",");
+						return `${encodeURIComponent(key)}=${params[key].join(",")}`;
 					default:
-						return encodeURIComponent(key) + "=" + encodeURIComponent(params[key]);
+						return `${encodeURIComponent(key)}=${encodeURIComponent(params[key])}`;
 				}
 			})
 			.join("&");

modules/default/weather/providers/openweathermap.js

@@ -413,8 +413,8 @@ WeatherProvider.register("openweathermap", {
 	getParams() {
 		let params = "?";
 		if (this.config.weatherEndpoint === "/onecall") {
-			params += "lat=" + this.config.lat;
-			params += "&lon=" + this.config.lon;
+			params += `lat=${this.config.lat}`;
+			params += `&lon=${this.config.lon}`;
 			if (this.config.type === "current") {
 				params += "&exclude=minutely,hourly,daily";
 			} else if (this.config.type === "hourly") {
@@ -425,23 +425,23 @@ WeatherProvider.register("openweathermap", {
 				params += "&exclude=minutely";
 			}
 		} else if (this.config.lat && this.config.lon) {
-			params += "lat=" + this.config.lat + "&lon=" + this.config.lon;
+			params += `lat=${this.config.lat}&lon=${this.config.lon}`;
 		} else if (this.config.locationID) {
-			params += "id=" + this.config.locationID;
+			params += `id=${this.config.locationID}`;
 		} else if (this.config.location) {
-			params += "q=" + this.config.location;
+			params += `q=${this.config.location}`;
 		} else if (this.firstEvent && this.firstEvent.geo) {
-			params += "lat=" + this.firstEvent.geo.lat + "&lon=" + this.firstEvent.geo.lon;
+			params += `lat=${this.firstEvent.geo.lat}&lon=${this.firstEvent.geo.lon}`;
 		} else if (this.firstEvent && this.firstEvent.location) {
-			params += "q=" + this.firstEvent.location;
+			params += `q=${this.firstEvent.location}`;
 		} else {
 			this.hide(this.config.animationSpeed, { lockString: this.identifier });
 			return;
 		}
 
 		params += "&units=metric"; // WeatherProviders should use metric internally and use the units only for when displaying data
-		params += "&lang=" + this.config.lang;
-		params += "&APPID=" + this.config.apiKey;
+		params += `&lang=${this.config.lang}`;
+		params += `&APPID=${this.config.apiKey}`;
 
 		return params;
 	}

modules/default/weather/providers/smhi.js

@@ -33,7 +33,7 @@ WeatherProvider.register("smhi", {
 				this.setFetchedLocation(this.config.location || `(${coordinates.lat},${coordinates.lon})`);
 				this.setCurrentWeather(weatherObject);
 			})
-			.catch((error) => Log.error("Could not load data: " + error.message))
+			.catch((error) => Log.error(`Could not load data: ${error.message}`))
 			.finally(() => this.updateAvailable());
 	},
 
@@ -48,7 +48,7 @@ WeatherProvider.register("smhi", {
 				this.setFetchedLocation(this.config.location || `(${coordinates.lat},${coordinates.lon})`);
 				this.setWeatherForecast(weatherObjects);
 			})
-			.catch((error) => Log.error("Could not load data: " + error.message))
+			.catch((error) => Log.error(`Could not load data: ${error.message}`))
 			.finally(() => this.updateAvailable());
 	},
 
@@ -63,7 +63,7 @@ WeatherProvider.register("smhi", {
 				this.setFetchedLocation(this.config.location || `(${coordinates.lat},${coordinates.lon})`);
 				this.setWeatherHourly(weatherObjects);
 			})
-			.catch((error) => Log.error("Could not load data: " + error.message))
+			.catch((error) => Log.error(`Could not load data: ${error.message}`))
 			.finally(() => this.updateAvailable());
 	},
 
@@ -75,7 +75,7 @@ WeatherProvider.register("smhi", {
 	setConfig(config) {
 		this.config = config;
 		if (!config.precipitationValue || ["pmin", "pmean", "pmedian", "pmax"].indexOf(config.precipitationValue) === -1) {
-			Log.log("invalid or not set: " + config.precipitationValue);
+			Log.log(`invalid or not set: ${config.precipitationValue}`);
 			config.precipitationValue = this.defaults.precipitationValue;
 		}
 	},

modules/default/weather/providers/ukmetoffice.js

@@ -195,8 +195,8 @@ WeatherProvider.register("ukmetoffice", {
 	 */
 	getParams(forecastType) {
 		let params = "?";
-		params += "res=" + forecastType;
-		params += "&key=" + this.config.apiKey;
+		params += `res=${forecastType}`;
+		params += `&key=${this.config.apiKey}`;
 		return params;
 	}
 });

modules/default/weather/providers/ukmetofficedatahub.js

@@ -55,9 +55,9 @@ WeatherProvider.register("ukmetofficedatahub", {
 	// Build URL with query strings according to DataHub API (https://metoffice.apiconnect.ibmcloud.com/metoffice/production/api)
 	getUrl(forecastType) {
 		let queryStrings = "?";
-		queryStrings += "latitude=" + this.config.lat;
-		queryStrings += "&longitude=" + this.config.lon;
-		queryStrings += "&includeLocationName=" + true;
+		queryStrings += `latitude=${this.config.lat}`;
+		queryStrings += `&longitude=${this.config.lon}`;
+		queryStrings += `&includeLocationName=${true}`;
 
 		// Return URL, making sure there is a trailing "/" in the base URL.
 		return this.config.apiBase + (this.config.apiBase.endsWith("/") ? "" : "/") + forecastType + queryStrings;
@@ -104,7 +104,7 @@ WeatherProvider.register("ukmetofficedatahub", {
 			})
 
 			// Catch any error(s)
-			.catch((error) => Log.error("Could not load data: " + error.message))
+			.catch((error) => Log.error(`Could not load data: ${error.message}`))
 
 			// Let the module know there is data available
 			.finally(() => this.updateAvailable());
@@ -173,7 +173,7 @@ WeatherProvider.register("ukmetofficedatahub", {
 			})
 
 			// Catch any error(s)
-			.catch((error) => Log.error("Could not load data: " + error.message))
+			.catch((error) => Log.error(`Could not load data: ${error.message}`))
 
 			// Let the module know there is new data available
 			.finally(() => this.updateAvailable());

modules/default/weather/providers/weatherbit.js

@@ -55,7 +55,7 @@ WeatherProvider.register("weatherbit", {
 				const forecast = this.generateWeatherObjectsFromForecast(data.data);
 				this.setWeatherForecast(forecast);
 
-				this.fetchedLocationName = data.city_name + ", " + data.state_code;
+				this.fetchedLocationName = `${data.city_name}, ${data.state_code}`;
 			})
 			.catch(function (request) {
 				Log.error("Could not load data ... ", request);
@@ -111,7 +111,7 @@ WeatherProvider.register("weatherbit", {
 		currentWeather.sunrise = moment(currentWeatherData.data[0].sunrise, "HH:mm").add(tzOffset, "m");
 		currentWeather.sunset = moment(currentWeatherData.data[0].sunset, "HH:mm").add(tzOffset, "m");
 
-		this.fetchedLocationName = currentWeatherData.data[0].city_name + ", " + currentWeatherData.data[0].state_code;
+		this.fetchedLocationName = `${currentWeatherData.data[0].city_name}, ${currentWeatherData.data[0].state_code}`;
 
 		return currentWeather;
 	},

modules/default/weather/providers/weathergov.js

@@ -129,10 +129,10 @@ WeatherProvider.register("weathergov", {
 					// points URL did not respond with usable data.
 					return;
 				}
-				this.fetchedLocationName = data.properties.relativeLocation.properties.city + ", " + data.properties.relativeLocation.properties.state;
-				Log.log("Forecast location is " + this.fetchedLocationName);
-				this.forecastURL = data.properties.forecast + "?units=si";
-				this.forecastHourlyURL = data.properties.forecastHourly + "?units=si";
+				this.fetchedLocationName = `${data.properties.relativeLocation.properties.city}, ${data.properties.relativeLocation.properties.state}`;
+				Log.log(`Forecast location is ${this.fetchedLocationName}`);
+				this.forecastURL = `${data.properties.forecast}?units=si`;
+				this.forecastHourlyURL = `${data.properties.forecastHourly}?units=si`;
 				this.forecastGridDataURL = data.properties.forecastGridData;
 				this.observationStationsURL = data.properties.observationStations;
 				// with this URL, we chain another promise for the station obs URL
@@ -143,7 +143,7 @@ WeatherProvider.register("weathergov", {
 					// obs station URL did not respond with usable data.
 					return;
 				}
-				this.stationObsURL = obsData.features[0].id + "/observations/latest";
+				this.stationObsURL = `${obsData.features[0].id}/observations/latest`;
 			})
 			.catch((err) => {
 				Log.error(err);

modules/default/weather/providers/yr.js

@@ -252,12 +252,12 @@ WeatherProvider.register("yr", {
 						this.cacheStellarData(stellarData);
 						resolve(stellarData);
 					} else {
-						reject("No stellar data returned from Yr for " + tomorrow);
+						reject(`No stellar data returned from Yr for ${tomorrow}`);
 					}
 				})
 				.catch((err) => {
 					Log.error(err);
-					reject("Unable to get stellar data from Yr for " + tomorrow);
+					reject(`Unable to get stellar data from Yr for ${tomorrow}`);
 				})
 				.finally(() => {
 					localStorage.removeItem("yrIsFetchingStellarData");
@@ -275,7 +275,7 @@ WeatherProvider.register("yr", {
 						this.cacheStellarData(stellarData);
 						resolve(stellarData);
 					} else {
-						Log.error("Something went wrong when fetching stellar data. Responses: " + stellarData);
+						Log.error(`Something went wrong when fetching stellar data. Responses: ${stellarData}`);
 						reject(stellarData);
 					}
 				})

modules/default/weather/weather.js

@@ -60,13 +60,13 @@ Module.register("weather", {
 
 	// Return the scripts that are necessary for the weather module.
 	getScripts: function () {
-		return ["moment.js", this.file("../utils.js"), "weatherutils.js", "weatherprovider.js", "weatherobject.js", "suncalc.js", this.file("providers/" + this.config.weatherProvider.toLowerCase() + ".js")];
+		return ["moment.js", this.file("../utils.js"), "weatherutils.js", "weatherprovider.js", "weatherobject.js", "suncalc.js", this.file(`providers/${this.config.weatherProvider.toLowerCase()}.js`)];
 	},
 
 	// Override getHeader method.
 	getHeader: function () {
 		if (this.config.appendLocationNameToHeader && this.weatherProvider) {
-			if (this.data.header) return this.data.header + " " + this.weatherProvider.fetchedLocation();
+			if (this.data.header) return `${this.data.header} ${this.weatherProvider.fetchedLocation()}`;
 			else return this.weatherProvider.fetchedLocation();
 		}
 
@@ -233,7 +233,7 @@ Module.register("weather", {
 			"unit",
 			function (value, type, valueUnit) {
 				if (type === "temperature") {
-					value = this.roundValue(WeatherUtils.convertTemp(value, this.config.tempUnits)) + "°";
+					value = `${this.roundValue(WeatherUtils.convertTemp(value, this.config.tempUnits))}°`;
 					if (this.config.degreeLabel) {
 						if (this.config.tempUnits === "metric") {
 							value += "C";

serveronly/index.js

@@ -4,5 +4,5 @@ const Log = require("logger");
 app.start().then((config) => {
 	const bindAddress = config.address ? config.address : "localhost";
 	const httpType = config.useHttps ? "https" : "http";
-	Log.log("\nReady to go! Please point your browser to: " + httpType + "://" + bindAddress + ":" + config.port);
+	Log.log(`\nReady to go! Please point your browser to: ${httpType}://${bindAddress}:${config.port}`);
 });

tests/configs/empty_ipWhiteList.js

@@ -3,7 +3,7 @@
  * By Rodrigo Ramírez Norambuena https://rodrigoramirez.com
  * MIT Licensed.
  */
-let config = require(process.cwd() + "/tests/configs/default.js").configFactory({
+let config = require(`${process.cwd()}/tests/configs/default.js`).configFactory({
 	ipWhitelist: []
 });
 

tests/configs/modules/positions.js

@@ -14,7 +14,7 @@ let config = {
 					module: "helloworld",
 					position: positions[idx],
 					config: {
-						text: "Text in " + positions[idx]
+						text: `Text in ${positions[idx]}`
 					}
 				});
 			}

tests/configs/noIpWhiteList.js

@@ -3,7 +3,7 @@
  * By Rodrigo Ramírez Norambuena https://rodrigoramirez.com
  * MIT Licensed.
  */
-let config = require(process.cwd() + "/tests/configs/default.js").configFactory({
+let config = require(`${process.cwd()}/tests/configs/default.js`).configFactory({
 	ipWhitelist: ["x.x.x.x"]
 });
 

tests/configs/port_8090.js

@@ -3,7 +3,7 @@
  * By Rodrigo Ramírez Norambuena https://rodrigoramirez.com
  * MIT Licensed.
  */
-let config = require(process.cwd() + "/tests/configs/default.js").configFactory({
+let config = require(`${process.cwd()}/tests/configs/default.js`).configFactory({
 	port: 8090
 });
 

tests/e2e/fonts_spec.js

@@ -3,7 +3,7 @@ const helpers = require("./helpers/global-setup");
 describe("All font files from roboto.css should be downloadable", () => {
 	const fontFiles = [];
 	// Statements below filters out all 'url' lines in the CSS file
-	const fileContent = require("fs").readFileSync(__dirname + "/../../fonts/roboto.css", "utf8");
+	const fileContent = require("fs").readFileSync(`${__dirname}/../../fonts/roboto.css`, "utf8");
 	const regex = /\burl\(['"]([^'"]+)['"]\)/g;
 	let match = regex.exec(fileContent);
 	while (match !== null) {
@@ -21,7 +21,7 @@ describe("All font files from roboto.css should be downloadable", () => {
 	});
 
 	test.each(fontFiles)("should return 200 HTTP code for file '%s'", async (fontFile) => {
-		const fontUrl = "http://localhost:8080/fonts/" + fontFile;
+		const fontUrl = `http://localhost:8080/fonts/${fontFile}`;
 		const res = await helpers.fetch(fontUrl);
 		expect(res.status).toBe(200);
 	});

tests/e2e/helpers/basic-auth.js

@@ -12,7 +12,7 @@ app.use(basicAuth);
 
 // Set available directories
 const directories = ["/tests/configs", "/tests/mocks"];
-const rootPath = path.resolve(__dirname + "/../../../");
+const rootPath = path.resolve(`${__dirname}/../../../`);
 
 for (let directory of directories) {
 	app.use(directory, express.static(path.resolve(rootPath + directory)));

tests/e2e/helpers/global-setup.js

@@ -28,7 +28,7 @@ exports.stopApplication = async () => {
 
 exports.getDocument = () => {
 	return new Promise((resolve) => {
-		const url = "http://" + (config.address || "localhost") + ":" + (config.port || "8080");
+		const url = `http://${config.address || "localhost"}:${config.port || "8080"}`;
 		jsdom.JSDOM.fromURL(url, { resources: "usable", runScripts: "dangerously" }).then((dom) => {
 			dom.window.name = "jsdom";
 			dom.window.fetch = corefetch;

tests/e2e/modules/calendar_spec.js

@@ -91,7 +91,7 @@ describe("Calendar module", () => {
 				await helpers.getDocument();
 			});
 
-			it('should contain text "Mar 25th" in timezone UTC ' + -i, async () => {
+			it(`should contain text "Mar 25th" in timezone UTC ${-i}`, async () => {
 				await testTextContain(".calendar", "Mar 25th");
 			});
 		});

tests/e2e/modules/clock_spec.js

@@ -89,7 +89,7 @@ describe("Clock module", () => {
 
 		it("should show the week with the correct number of week of year", async () => {
 			const currentWeekNumber = moment().week();
-			const weekToShow = "Week " + currentWeekNumber;
+			const weekToShow = `Week ${currentWeekNumber}`;
 			const elem = await helpers.waitForElement(".clock .week");
 			expect(elem).not.toBe(null);
 			expect(elem.textContent).toBe(weekToShow);

tests/e2e/modules/weather_forecast_spec.js

@@ -13,14 +13,14 @@ describe("Weather module: Weather Forecast", () => {
 
 		const days = ["Today", "Tomorrow", "Sun", "Mon", "Tue"];
 		for (const [index, day] of days.entries()) {
-			it("should render day " + day, async () => {
+			it(`should render day ${day}`, async () => {
 				await weatherFunc.getText(`.weather table.small tr:nth-child(${index + 1}) td:nth-child(1)`, day);
 			});
 		}
 
 		const icons = ["day-cloudy", "rain", "day-sunny", "day-sunny", "day-sunny"];
 		for (const [index, icon] of icons.entries()) {
-			it("should render icon " + icon, async () => {
+			it(`should render icon ${icon}`, async () => {
 				const elem = await helpers.waitForElement(`.weather table.small tr:nth-child(${index + 1}) td:nth-child(2) span.wi-${icon}`);
 				expect(elem).not.toBe(null);
 			});
@@ -28,21 +28,21 @@ describe("Weather module: Weather Forecast", () => {
 
 		const maxTemps = ["24.4°", "21.0°", "22.9°", "23.4°", "20.6°"];
 		for (const [index, temp] of maxTemps.entries()) {
-			it("should render max temperature " + temp, async () => {
+			it(`should render max temperature ${temp}`, async () => {
 				await weatherFunc.getText(`.weather table.small tr:nth-child(${index + 1}) td:nth-child(3)`, temp);
 			});
 		}
 
 		const minTemps = ["15.3°", "13.6°", "13.8°", "13.9°", "10.9°"];
 		for (const [index, temp] of minTemps.entries()) {
-			it("should render min temperature " + temp, async () => {
+			it(`should render min temperature ${temp}`, async () => {
 				await weatherFunc.getText(`.weather table.small tr:nth-child(${index + 1}) td:nth-child(4)`, temp);
 			});
 		}
 
 		const opacities = [1, 1, 0.8, 0.5333333333333333, 0.2666666666666667];
 		for (const [index, opacity] of opacities.entries()) {
-			it("should render fading of rows with opacity=" + opacity, async () => {
+			it(`should render fading of rows with opacity=${opacity}`, async () => {
 				const elem = await helpers.waitForElement(`.weather table.small tr:nth-child(${index + 1})`);
 				expect(elem).not.toBe(null);
 				expect(elem.outerHTML).toContain(`<tr style="opacity: ${opacity};">`);
@@ -57,7 +57,7 @@ describe("Weather module: Weather Forecast", () => {
 
 		const days = ["Fri", "Sat", "Sun", "Mon", "Tue"];
 		for (const [index, day] of days.entries()) {
-			it("should render day " + day, async () => {
+			it(`should render day ${day}`, async () => {
 				await weatherFunc.getText(`.weather table.small tr:nth-child(${index + 1}) td:nth-child(1)`, day);
 			});
 		}
@@ -83,7 +83,7 @@ describe("Weather module: Weather Forecast", () => {
 		const precipitations = [undefined, "2.51 mm"];
 		for (const [index, precipitation] of precipitations.entries()) {
 			if (precipitation) {
-				it("should render precipitation amount " + precipitation, async () => {
+				it(`should render precipitation amount ${precipitation}`, async () => {
 					await weatherFunc.getText(`.weather table tr:nth-child(${index + 1}) td.precipitation-amount`, precipitation);
 				});
 			}
@@ -98,7 +98,7 @@ describe("Weather module: Weather Forecast", () => {
 		describe("Temperature units", () => {
 			const temperatures = ["75_9°", "69_8°", "73_2°", "74_1°", "69_1°"];
 			for (const [index, temp] of temperatures.entries()) {
-				it("should render custom decimalSymbol = '_' for temp " + temp, async () => {
+				it(`should render custom decimalSymbol = '_' for temp ${temp}`, async () => {
 					await weatherFunc.getText(`.weather table.small tr:nth-child(${index + 1}) td:nth-child(3)`, temp);
 				});
 			}
@@ -108,7 +108,7 @@ describe("Weather module: Weather Forecast", () => {
 			const precipitations = [undefined, "0.10 in"];
 			for (const [index, precipitation] of precipitations.entries()) {
 				if (precipitation) {
-					it("should render precipitation amount " + precipitation, async () => {
+					it(`should render precipitation amount ${precipitation}`, async () => {
 						await weatherFunc.getText(`.weather table.small tr:nth-child(${index + 1}) td.precipitation-amount`, precipitation);
 					});
 				}

tests/e2e/modules_position_spec.js

@@ -13,10 +13,10 @@ describe("Position of modules", () => {
 
 	for (const position of positions) {
 		const className = position.replace("_", ".");
-		it("should show text in " + position, async () => {
-			const elem = await helpers.waitForElement("." + className);
+		it(`should show text in ${position}`, async () => {
+			const elem = await helpers.waitForElement(`.${className}`);
 			expect(elem).not.toBe(null);
-			expect(elem.textContent).toContain("Text in " + position);
+			expect(elem.textContent).toContain(`Text in ${position}`);
 		});
 	}
 });

tests/e2e/vendor_spec.js

@@ -9,11 +9,11 @@ describe("Vendors", () => {
 	});
 
 	describe("Get list vendors", () => {
-		const vendors = require(__dirname + "/../../vendor/vendor.js");
+		const vendors = require(`${__dirname}/../../vendor/vendor.js`);
 
 		Object.keys(vendors).forEach((vendor) => {
 			it(`should return 200 HTTP code for vendor "${vendor}"`, async () => {
-				const urlVendor = "http://localhost:8080/vendor/" + vendors[vendor];
+				const urlVendor = `http://localhost:8080/vendor/${vendors[vendor]}`;
 				const res = await helpers.fetch(urlVendor);
 				expect(res.status).toBe(200);
 			});
@@ -21,7 +21,7 @@ describe("Vendors", () => {
 
 		Object.keys(vendors).forEach((vendor) => {
 			it(`should return 404 HTTP code for vendor https://localhost/"${vendor}"`, async () => {
-				const urlVendor = "http://localhost:8080/" + vendors[vendor];
+				const urlVendor = `http://localhost:8080/${vendors[vendor]}`;
 				const res = await helpers.fetch(urlVendor);
 				expect(res.status).toBe(404);
 			});

tests/electron/modules/calendar_spec.js

@@ -7,7 +7,7 @@ describe("Calendar module", () => {
 	 * @param {string} cssClass css selector
 	 */
 	const doTest = async (cssClass) => {
-		let elem = await helpers.getElement(".calendar .module-content .event" + cssClass);
+		let elem = await helpers.getElement(`.calendar .module-content .event${cssClass}`);
 		expect(await elem.isVisible()).toBe(true);
 	};
 

tests/utils/weather_mocker.js

@@ -23,7 +23,7 @@ const readMockData = (type, extendedData = {}) => {
 			break;
 	}
 
-	return JSON.stringify(_.merge({}, JSON.parse(fs.readFileSync(path.resolve(__dirname + "/../mocks/" + fileName)).toString()), extendedData));
+	return JSON.stringify(_.merge({}, JSON.parse(fs.readFileSync(path.resolve(`${__dirname}/../mocks/${fileName}`)).toString()), extendedData));
 };
 
 const injectMockData = (configFileName, extendedData = {}) => {
@@ -35,9 +35,9 @@ const injectMockData = (configFileName, extendedData = {}) => {
 	} else {
 		mockWeather = readMockData("current", extendedData);
 	}
-	let content = fs.readFileSync(path.resolve(__dirname + "../../../" + configFileName)).toString();
+	let content = fs.readFileSync(path.resolve(`${__dirname}../../../${configFileName}`)).toString();
 	content = content.replace("#####WEATHERDATA#####", mockWeather);
-	fs.writeFileSync(path.resolve(__dirname + "../../../config/config.js"), content);
+	fs.writeFileSync(path.resolve(`${__dirname}../../../config/config.js`), content);
 };
 
 module.exports = { injectMockData };