added eslint

javascript/.eslintrc.js

@@ -0,0 +1,17 @@
+module.exports = {
+    "env": {
+        "browser": true,
+        "es6": true
+    },
+    "extends": "eslint:recommended",
+    "globals": {
+        "Atomics": "readonly",
+        "SharedArrayBuffer": "readonly"
+    },
+    "parserOptions": {
+        "ecmaVersion": 2018,
+        "sourceType": "module"
+    },
+    "rules": {
+    }
+};

javascript/package.json

@@ -3,6 +3,13 @@
     "@babel/core": "^7.4.4",
     "@babel/preset-env": "^7.4.4",
     "babel-loader": "^8.0.5",
+    "eslint": "^5.16.0",
+    "eslint-config-standard": "^12.0.0",
+    "eslint-loader": "^2.1.2",
+    "eslint-plugin-import": "^2.17.2",
+    "eslint-plugin-node": "^9.0.1",
+    "eslint-plugin-promise": "^4.1.1",
+    "eslint-plugin-standard": "^4.0.0",
     "webpack": "^4.30.0",
     "webpack-cli": "^3.3.2"
   }

javascript/src/zulma_search.js

@@ -1,3 +1,5 @@
+/* eslint-disable */
+
 function debounce(func, wait) {
   var timeout;
 

javascript/src/zulma_switchcss.js

@@ -35,7 +35,7 @@
         }
 
         saveTheme(themeName);
-    };
+    }
 
     /* Removes all current stylesheets on the page */
     function removeStylesheets() {
@@ -57,7 +57,7 @@
         previousLink = null;
         //make body visible again if it was hidden
         showBody();
-    };
+    }
 
     function onLinkError() {
         //remove event listeners
@@ -77,22 +77,23 @@
         setThemeSelect(document.querySelectorAll(`.${STYLESHEET_CLASSNAME}`)[0].id)
         //make body visible again if it was hidden
         showBody();
-    };
+    }
 
     /* Saves the current theme in localstorage */
     function saveTheme(themeName) {
         localStorage.setItem(THEME_KEY, themeName);
-    };
+    }
 
     /* Clears the current theme in localstorage */
     function clearTheme() {
         localStorage.removeItem(THEME_KEY);
-    };
+    }
 
     /* Hides the body of the page */
     function hideBody() {
-        var head = document.getElementsByTagName('head')[0];
-        var style = document.createElement('style');
+        let head = document.getElementsByTagName('head')[0];
+        let style = document.createElement('style');
+        let css = 'body{visibility:hidden;}';
 
         style.id = STOP_BLINK_CSS_ID;
         style.setAttribute('type', 'text/css');
@@ -100,17 +101,17 @@
         if (style.styleSheet) {
             style.styleSheet.cssText = css;
         } else {
-            style.appendChild(document.createTextNode('body{visibility:hidden;}'));
+            style.appendChild(document.createTextNode(css));
         }
         head.appendChild(style);
-    };
+    }
 
     /* Shows the body of the page */
     function showBody() {
         let css = document.getElementById(STOP_BLINK_CSS_ID);
         if (css)
             css.remove();
-    };
+    }
 
     /* Sets the theme selection to the given theme */
     function setThemeSelect(theme) {
@@ -167,6 +168,6 @@
             }
         });
     }
-}(switch_css = window.switch_css || {}));
+}(switch_css = window.switch_css || {})); // eslint-disable-line
 
-switch_css.init();
+switch_css.init(); // eslint-disable-line

javascript/webpack.config.js

@@ -14,7 +14,7 @@ module.exports = {
         rules: [{
             test: /\.js$/,
             exclude: /node_modules/,
-            use: ['babel-loader']
+            use: ["babel-loader", "eslint-loader"]
         }]
     },
     resolve: {