import eslint config

.eslintrc.js

@@ -0,0 +1,16 @@
+module.exports = {
+  root: true,
+  env: {
+    browser: true,
+    es2021: true,
+    node: true
+  },
+  parser: '@babel/eslint-parser',
+  extends: [
+    'standard'
+  ],
+  rules: {
+    'no-unused-vars': ['warn'],
+    semi: ['error', 'always']
+  }
+};

gulpfile.mjs

@@ -185,7 +185,7 @@ function clean() {
 
 // --- Browser ---
 
-function browser_sync(done) {
+function bsInit(done) {
 	browserSync.init({
         open: false,
         injectChanges: true,
@@ -194,7 +194,7 @@ function browser_sync(done) {
     done();
 };
 
-function reload(done) {
+function bsReload(done) {
     browserSync.reload();
     done();
 };
@@ -205,11 +205,11 @@ function clearCache(done) {
 };
 
 function watchFiles(done) {
-    watch(config.css.watch, series(css, clearCache, reload));
-    watch(config.js.watch, series(js, clearCache, reload));
-    watch(config.php.watch, series(clearCache, reload));
-    watch(config.img.watch, series(img, clearCache, reload));
-    watch(config.fonts.watch, series(fonts, clearCache, reload));
+    watch(config.css.watch, series(css, clearCache, bsReload));
+    watch(config.js.watch, series(js, clearCache, bsReload));
+    watch(config.php.watch, series(clearCache, bsReload));
+    watch(config.img.watch, series(img, clearCache, bsReload));
+    watch(config.fonts.watch, series(fonts, clearCache, bsReload));
     done();
 };
 
@@ -219,7 +219,7 @@ function watchFiles(done) {
 const i18n = series(domain, pot);
 const dev = series(setDev, clean, parallel(css, js, img, fonts, icons));
 const build = series(setProd, clean, parallel(css, js, img, fonts, icons, i18n));
-const watcher = parallel(browser_sync, watchFiles);
+const watcher = parallel(bsInit, watchFiles);
 
 export { css, js, img, fonts, icons, i18n, dev, build, watcher as watch };
 export default dev;

package.json

@@ -10,7 +10,8 @@
   "scripts": {
     "dev": "gulp default",
     "build": "gulp build",
-    "watch": "gulp watch"
+    "watch": "gulp watch",
+    "lint:js": "eslint --ext js,mjs --fix --ignore-path .gitignore ."
   },
   "dependencies": {
     "@fortawesome/fontawesome-free": "^5.15.4",
@@ -19,6 +20,7 @@
   },
   "devDependencies": {
     "@babel/core": "^7.15.5",
+    "@babel/eslint-parser": "^7.15.4",
     "@babel/preset-env": "^7.15.4",
     "@mr-hope/gulp-sass": "^2.0.0",
     "@rbnlffl/gulp-rollup": "^0.1.1",
@@ -27,6 +29,11 @@
     "@rollup/plugin-node-resolve": "^13.0.4",
     "browser-sync": "^2.27.5",
     "del": "^6.0.0",
+    "eslint": "^7.32.0",
+    "eslint-config-standard": "^16.0.3",
+    "eslint-plugin-import": "^2.24.2",
+    "eslint-plugin-node": "^11.1.0",
+    "eslint-plugin-promise": "^5.1.0",
     "gulp": "^4.0.2",
     "gulp-autoprefixer": "^8.0.0",
     "gulp-cache": "^1.1.3",