refactor: enable ESLint rule "no-unused-vars" and handle related issues (#4080)

In PR #4072 GitHub Bot complained about an unused var. Instead of just
removing that one, I checked why ESLint hadn't complained about it: We
had disabled the rule for it.

So I enabled rule and resolved the issues that ESLint then detected.

Related to #4073

defaultmodules/calendar/calendar.js

@@ -167,7 +167,7 @@ Module.register("calendar", {
 		this.selfUpdate();
 	},
 
-	notificationReceived (notification, payload, sender) {
+	notificationReceived (notification, payload) {
 		if (notification === "FETCH_CALENDAR") {
 			this.sendSocketNotification(notification, { url: payload.url, id: this.identifier });
 		}

defaultmodules/calendar/calendarfetcher.js

@@ -1,6 +1,5 @@
 const ical = require("node-ical");
 const Log = require("logger");
-const { Agent } = require("undici");
 const CalendarFetcherUtils = require("./calendarfetcherutils");
 const HTTPFetcher = require("#http_fetcher");
 

defaultmodules/calendar/calendarfetcherutils.js

@@ -62,7 +62,7 @@ const CalendarFetcherUtils = {
 				// Subtract 1 second so that events that start on the middle of the night will not repeat.
 				.subtract(1, "seconds");
 
-		Object.entries(data).forEach(([key, event]) => {
+		Object.values(data).forEach((event) => {
 			if (event.type !== "VEVENT") {
 				return;
 			}

defaultmodules/compliments/compliments.js

@@ -308,7 +308,7 @@ Module.register("compliments", {
 	},
 
 	// Override notification handler.
-	notificationReceived (notification, payload, sender) {
+	notificationReceived (notification, payload) {
 		if (notification === "CURRENTWEATHER_TYPE") {
 			this.currentWeatherType = payload.type;
 		}

defaultmodules/newsfeed/newsfeed.js

@@ -411,7 +411,7 @@ Module.register("newsfeed", {
 		}
 	},
 
-	notificationReceived (notification, payload, sender) {
+	notificationReceived (notification) {
 		const before = this.activeItem;
 		if (notification === "MODULE_DOM_CREATED" && this.config.hideLoading) {
 			this.hide();

defaultmodules/updatenotification/git_helper.js

@@ -51,7 +51,7 @@ class GitHelper {
 				// Folder has .git and has at least one git remote, watch this folder
 				this.gitRepos.push({ module: moduleName, folder: moduleFolder });
 			}
-		} catch (err) {
+		} catch {
 			// Error when directory .git doesn't exist or doesn't have any remotes
 			// This module is not managed with git, skip
 		}

defaultmodules/updatenotification/update_helper.js

@@ -113,7 +113,7 @@ class Updater {
 		Log.info(`Updating ${module.name}...`);
 
 		return new Promise((resolve) => {
-			Exec(Command, { cwd: modulePath, timeout: this.timeout }, (error, stdout, stderr) => {
+			Exec(Command, { cwd: modulePath, timeout: this.timeout }, (error, stdout) => {
 				if (error) {
 					Log.error(`exec error: ${error}`);
 					Result.error = true;
@@ -143,7 +143,7 @@ class Updater {
 	pm2Restart () {
 		Log.info("[PM2] restarting MagicMirror...");
 		const pm2 = require("pm2");
-		pm2.restart(this.PM2Id, (err, proc) => {
+		pm2.restart(this.PM2Id, (err) => {
 			if (err) {
 				Log.error("[PM2] restart Error", err);
 			}

defaultmodules/weather/providers/yr.js

@@ -314,7 +314,7 @@ class YrProvider {
 
 		// Convert collected data to forecast objects
 		const days = [];
-		for (const [dateStr, data] of dailyData) {
+		for (const data of dailyData.values()) {
 			const stellarInfo = this.#getStellarInfoForDate(data.date);
 
 			const dayData = {

defaultmodules/weather/weather.js

@@ -1,4 +1,4 @@
-/* global WeatherProvider, WeatherUtils, WeatherObject, formatTime */
+/* global WeatherUtils, WeatherObject, formatTime */
 
 Module.register("weather", {
 	// Default module config.

eslint.config.mjs

@@ -68,7 +68,6 @@ export default defineConfig([
 			"no-throw-literal": "error",
 			"no-undefined": "off",
 			"no-unneeded-ternary": "error",
-			"no-unused-vars": "off",
 			"no-useless-return": "error",
 			"no-warning-comments": "off",
 			"object-shorthand": ["error", "methods"],

js/animateCSS.js

@@ -1,4 +1,5 @@
 /* enumeration of animations in Array **/
+
 const AnimateCSSIn = [
 	// Attention seekers
 	"bounce",
@@ -155,4 +156,4 @@ function removeAnimateCSS (element, animation) {
 	node.classList.remove("animate__animated", animationName);
 	node.style.removeProperty("--animate-duration");
 }
-if (typeof window === "undefined") module.exports = { AnimateCSSIn, AnimateCSSOut };
+if (typeof window === "undefined") module.exports = { AnimateCSSIn, AnimateCSSOut, addAnimateCSS, removeAnimateCSS };

js/app.js

@@ -84,7 +84,7 @@ function App () {
 
 		try {
 			fs.accessSync(moduleFile, fs.constants.R_OK);
-		} catch (e) {
+		} catch {
 			Log.warn(`No ${moduleFile} found for module: ${moduleName}.`);
 		}
 
@@ -93,7 +93,7 @@ function App () {
 		let loadHelper = true;
 		try {
 			fs.accessSync(helperPath, fs.constants.R_OK);
-		} catch (e) {
+		} catch {
 			loadHelper = false;
 			Log.log(`No helper found for module: ${moduleName}.`);
 		}
@@ -188,7 +188,7 @@ function App () {
 			try {
 				fs.renameSync(`${global.root_path}/css/custom.css`, `${global.root_path}/${env.customCss}`);
 				Log.warn(`WARNING! Your custom css file was moved from ${global.root_path}/css/custom.css to ${global.root_path}/${env.customCss}`);
-			} catch (err) {
+			} catch {
 				Log.warn("WARNING! Your custom css file is currently located in the css folder. Please move it to the config folder!");
 			}
 		}

js/electron.js

@@ -115,7 +115,7 @@ function createWindow () {
 	}
 
 	// simulate mouse move to hide black cursor on start
-	mainWindow.webContents.on("dom-ready", (event) => {
+	mainWindow.webContents.on("dom-ready", () => {
 		mainWindow.webContents.sendInputEvent({ type: "mouseMove", x: 0, y: 0 });
 	});
 

js/http_fetcher.js

@@ -300,7 +300,7 @@ class HTTPFetcher extends EventEmitter {
 			try {
 				const urlObj = new URL(this.url);
 				shortUrl = `${urlObj.origin}${urlObj.pathname}${urlObj.search.length > 50 ? "?..." : urlObj.search}`;
-			} catch (urlError) {
+			} catch {
 				// If URL parsing fails, use original URL
 			}
 

js/ip_access_control.js

@@ -22,12 +22,12 @@ function isAllowed (clientIp, whitelist) {
 				// Single IP address - let ipaddr.process normalize both
 				const allowedAddr = ipaddr.process(entry);
 				return addr.toString() === allowedAddr.toString();
-			} catch (err) {
+			} catch {
 				Log.warn(`Invalid whitelist entry: ${entry}`);
 				return false;
 			}
 		});
-	} catch (err) {
+	} catch {
 		Log.warn(`Failed to parse client IP: ${clientIp}`);
 		return false;
 	}

js/loader.js

@@ -1,5 +1,6 @@
 /* global defaultModules, vendor */
 
+// eslint-disable-next-line no-unused-vars
 const Loader = (function () {
 
 	/* Create helper variables */

js/logger.js

@@ -29,7 +29,7 @@
 							return styleText("gray", parentDir === "js" ? `[${baseName}]` : `[${parentDir}]`);
 						}
 					}
-				} catch (err) { /* ignore */ }
+				} catch { /* ignore */ }
 				return styleText("gray", "[unknown]");
 			};
 

js/main.js

@@ -1,4 +1,4 @@
-/* global Loader, defaults, addAnimateCSS, removeAnimateCSS, AnimateCSSIn, AnimateCSSOut, modulePositions, io */
+/* global Loader, addAnimateCSS, removeAnimateCSS, AnimateCSSIn, AnimateCSSOut, modulePositions, io */
 
 const MM = (function () {
 	let modules = [];
@@ -408,7 +408,7 @@ const MM = (function () {
 			updateWrapperStates();
 
 			// Waiting for DOM-changes done in updateWrapperStates before we can start the animation.
-			const dummy = moduleWrapper.parentElement.parentElement.offsetHeight;
+			void moduleWrapper.parentElement.parentElement.offsetHeight;
 			moduleWrapper.style.opacity = 1;
 
 			if (haveAnimateName) {

js/server.js

@@ -98,7 +98,7 @@ function Server (configObj) {
 			}
 
 			let directories = ["/config", "/css", "/favicon.svg", "/defaultmodules", "/modules", "/node_modules/animate.css", "/node_modules/@fontsource", "/node_modules/@fortawesome", "/translations", "/tests/configs", "/tests/mocks"];
-			for (const [key, value] of Object.entries(vendor)) {
+			for (const value of Object.values(vendor)) {
 				const dirArr = value.split("/");
 				if (dirArr[0] === "node_modules") directories.push(`/${dirArr[0]}/${dirArr[1]}`);
 			}

js/socketclient.js

@@ -1,5 +1,6 @@
 /* global io */
 
+// eslint-disable-next-line no-unused-vars
 const MMSocket = function (moduleName) {
 	if (typeof moduleName !== "string") {
 		throw new Error("Please set the module name for the MMSocket.");

js/translator.js

@@ -17,7 +17,7 @@ const Translator = (function () {
 				throw new Error(`Unexpected response status: ${response.status}`);
 			}
 			return await response.json();
-		} catch (exception) {
+		} catch {
 			Log.error(`Loading json file =${file} failed`);
 			return null;
 		}

js/utils.js

@@ -55,7 +55,7 @@ const getModulePositions = () => {
 		try {
 			fs.writeFileSync(discoveredPositionsJSFilename, `const modulePositions=${JSON.stringify(modulePositions)}`);
 		}
-		catch (error) {
+		catch {
 			Log.error("unable to write js/positions.js with the discovered module positions\nmake the MagicMirror/js folder writeable by the user starting MagicMirror");
 		}
 	}
@@ -111,7 +111,7 @@ const loadConfig = () => {
 	try {
 		fs.accessSync(templateFile, fs.constants.F_OK);
 		Log.warn("config.js.template files are deprecated and not used anymore. You can use variables inside config.js so copy the template file content into config.js if needed.");
-	} catch (error) {
+	} catch {
 		// no action
 	}
 

serveronly/watcher.js

@@ -35,7 +35,7 @@ function getServerConfig () {
 			port: global.mmPort || config.port || 8080,
 			address: config.address || "localhost"
 		};
-	} catch (err) {
+	} catch {
 		serverConfig = { port: 8080, address: "localhost" };
 	}
 
@@ -248,7 +248,7 @@ try {
 			Log.warn(`Watch target is not a file (directories not supported): ${targetPath}`);
 		}
 	}
-} catch (err) {
+} catch {
 	// Config file might not exist or be invalid, use fallback targets
 	Log.warn("Could not load watchTargets from config.");
 }

tests/e2e/translations_spec.js

@@ -76,7 +76,7 @@ describe("translations", () => {
 		it("should load translation file", async () => {
 			const { Translator, Module, config } = dom.window;
 			config.language = "en";
-			Translator.load = vi.fn().mockImplementation((_m, _f, _fb) => null);
+			Translator.load = vi.fn().mockImplementation(() => null);
 
 			Module.register("name", { getTranslations: () => translations });
 			const MMM = Module.create("name");
@@ -89,7 +89,7 @@ describe("translations", () => {
 
 		it("should load translation + fallback file", async () => {
 			const { Translator, Module } = dom.window;
-			Translator.load = vi.fn().mockImplementation((_m, _f, _fb) => null);
+			Translator.load = vi.fn().mockImplementation(() => null);
 
 			Module.register("name", { getTranslations: () => translations });
 			const MMM = Module.create("name");
@@ -104,7 +104,7 @@ describe("translations", () => {
 		it("should load translation fallback file", async () => {
 			const { Translator, Module, config } = dom.window;
 			config.language = "--";
-			Translator.load = vi.fn().mockImplementation((_m, _f, _fb) => null);
+			Translator.load = vi.fn().mockImplementation(() => null);
 
 			Module.register("name", { getTranslations: () => translations });
 			const MMM = Module.create("name");

tests/electron/helpers/global-setup.js

@@ -70,7 +70,7 @@ exports.stopApplication = async (timeout = 10000) => {
 			if (electronProcess && !electronProcess.killed) {
 				electronProcess.kill("SIGKILL");
 			}
-		} catch (error) {
+		} catch {
 			// Ignore errors caused by Playwright already tearing down the connection
 		}
 	};
@@ -80,7 +80,7 @@ exports.stopApplication = async (timeout = 10000) => {
 			app.close(),
 			new Promise((_, reject) => setTimeout(() => reject(new Error("Electron close timeout")), timeout))
 		]);
-	} catch (error) {
+	} catch {
 		killElectron();
 	}
 };

tests/electron/modules/calendar_spec.js

@@ -26,6 +26,7 @@ describe("Calendar module", () => {
 	 * Use this for debugging broken tests, it will console log the text of the calendar module
 	 * @returns {Promise<void>}
 	 */
+	// eslint-disable-next-line no-unused-vars
 	const logAllText = async () => {
 		expect(global.page).not.toBeNull();
 		const loc = await global.page.locator(".calendar .event");

tests/mocks/testNotification/testNotification.js

@@ -42,9 +42,9 @@ Module.register("testNotification", {
 		let tableRow = document.createElement("tr");
 		table.appendChild(tableRow);
 
-		let tablecol1 = this.maketd(tableRow, col1);
-		let tablecol2 = this.maketd(tableRow, col2);
-		let tablecol3 = this.maketd(tableRow, col3);
+		this.maketd(tableRow, col1);
+		this.maketd(tableRow, col2);
+		this.maketd(tableRow, col3);
 
 		return tableRow;
 	},

tests/unit/modules/default/weather/providers/yr_spec.js

@@ -15,7 +15,6 @@ import { describe, it, expect, vi, beforeAll, beforeEach, afterAll, afterEach }
 import yrData from "../../../../../mocks/weather_yr.json" with { type: "json" };
 
 const YR_FORECAST_URL = "https://api.met.no/weatherapi/locationforecast/**";
-const YR_SUNRISE_URL = "https://api.met.no/weatherapi/sunrise/**";
 
 // Fixed time: 30 minutes after the first timeseries entry (2026-02-06T21:00:00Z)
 // This ensures timeseries[0] is always chosen as the closest past entry.