diff --git a/.eslintrc b/.eslintrc
index 3ba166a274..d09a88ac00 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -86,9 +86,9 @@
 		"no-nested-ternary": "off",
 		"operator-linebreak": "off",
 		"guard-for-in": "off",
-		"no-unneeded-ternary": "off",
-		"no-sequences": "off",
-		"no-extend-native": "off",
+		// "no-unneeded-ternary": "off",
+		// "no-sequences": "off",
+		// "no-extend-native": "off",
 		// "no-shadow-restricted-names": "off",
 		// "no-extra-boolean-cast": "off",
 		// "no-path-concat": "off",
diff --git a/install/web.js b/install/web.js
index dc9af8cce6..88b2495614 100644
--- a/install/web.js
+++ b/install/web.js
@@ -75,8 +75,8 @@ function welcome(req, res) {
 	res.render('install/index', {
 		databases: databases,
 		skipDatabaseSetup: !!nconf.get('database'),
-		error: res.locals.error ? true : false,
-		success: res.locals.success ? true : false,
+		error: !!res.locals.error,
+		success: !!res.locals.success,
 		values: req.body,
 		minimumPasswordLength: defaults.minimumPasswordLength,
 	});
diff --git a/loader.js b/loader.js
index 66c2de862a..ead0e36125 100644
--- a/loader.js
+++ b/loader.js
@@ -111,7 +111,7 @@ function forkWorker(index, isPrimary) {
 	}
 
 	process.env.isPrimary = isPrimary;
-	process.env.isCluster = ports.length > 1 ? true : false;
+	process.env.isCluster = ports.length > 1;
 	process.env.port = ports[index];
 
 	var worker = fork('app.js', args, {
diff --git a/public/src/admin/manage/group.js b/public/src/admin/manage/group.js
index f2e5c8c92e..8b77b2bf52 100644
--- a/public/src/admin/manage/group.js
+++ b/public/src/admin/manage/group.js
@@ -108,7 +108,7 @@ define('admin/manage/group', [
 			var btnEl = $(this);
 			var userRow = btnEl.parents('[data-uid]');
 			var ownerFlagEl = userRow.find('.member-name i');
-			var isOwner = !ownerFlagEl.hasClass('invisible') ? true : false;
+			var isOwner = !ownerFlagEl.hasClass('invisible');
 			var uid = userRow.attr('data-uid');
 			var action = btnEl.attr('data-action');
 
diff --git a/public/src/admin/modules/search.js b/public/src/admin/modules/search.js
index 26ecd8eee0..e950ea76c5 100644
--- a/public/src/admin/modules/search.js
+++ b/public/src/admin/modules/search.js
@@ -73,7 +73,7 @@ define('admin/modules/search', ['mousetrap'], function (mousetrap) {
 			if (!selected.length) {
 				selected = menu.find('li.result > a').first().attr('href');
 			}
-			var href = selected ? selected : config.relative_path + '/search/' + input.val();
+			var href = selected || config.relative_path + '/search/' + input.val();
 
 			ajaxify.go(href.replace(/^\//, ''));
 
diff --git a/public/src/app.js b/public/src/app.js
index e38f49178e..9983aef36f 100644
--- a/public/src/app.js
+++ b/public/src/app.js
@@ -129,7 +129,7 @@ app.cacheBuster = null;
 			title: '[[global:alert.success]]',
 			message: message,
 			type: 'success',
-			timeout: timeout ? timeout : 5000,
+			timeout: timeout || 5000,
 		});
 	};
 
@@ -144,7 +144,7 @@ app.cacheBuster = null;
 			title: '[[global:alert.error]]',
 			message: message,
 			type: 'danger',
-			timeout: timeout ? timeout : 10000,
+			timeout: timeout || 10000,
 		});
 	};
 
diff --git a/public/src/client/groups/details.js b/public/src/client/groups/details.js
index e4443ab7ff..e334f70ec5 100644
--- a/public/src/client/groups/details.js
+++ b/public/src/client/groups/details.js
@@ -54,7 +54,7 @@ define('forum/groups/details', [
 			var btnEl = $(this);
 			var userRow = btnEl.parents('[data-uid]');
 			var ownerFlagEl = userRow.find('.member-name > i');
-			var isOwner = !ownerFlagEl.hasClass('invisible') ? true : false;
+			var isOwner = !ownerFlagEl.hasClass('invisible');
 			var uid = userRow.attr('data-uid');
 			var action = btnEl.attr('data-action');
 
diff --git a/public/src/client/topic/move.js b/public/src/client/topic/move.js
index 1b5b3b6c8a..5ff9a02c49 100644
--- a/public/src/client/topic/move.js
+++ b/public/src/client/topic/move.js
@@ -10,7 +10,7 @@ define('forum/topic/move', function () {
 		Move.tids = tids;
 		Move.currentCid = currentCid;
 		Move.onComplete = onComplete;
-		Move.moveAll = tids ? false : true;
+		Move.moveAll = !tids;
 
 		socket.emit('categories.getMoveCategories', onCategoriesLoaded);
 	};
diff --git a/public/src/client/topic/posts.js b/public/src/client/topic/posts.js
index eaaf4894ce..5023eb54e6 100644
--- a/public/src/client/topic/posts.js
+++ b/public/src/client/topic/posts.js
@@ -21,7 +21,7 @@ define('forum/topic/posts', [
 			return;
 		}
 
-		data.loggedIn = app.user.uid ? true : false;
+		data.loggedIn = !!app.user.uid;
 		data.privileges = ajaxify.data.privileges;
 		Posts.modifyPostsByPrivileges(data.posts);
 
diff --git a/public/src/utils.js b/public/src/utils.js
index 2c2f4ac4dd..9d4692668d 100644
--- a/public/src/utils.js
+++ b/public/src/utils.js
@@ -448,6 +448,11 @@
 		},
 	};
 
+	if ('undefined' !== typeof window) {
+		window.utils = module.exports;
+	}
+
+		/* eslint "no-extend-native": "off" */
 	if (typeof String.prototype.startsWith !== 'function') {
 		String.prototype.startsWith = function (prefix) {
 			if (this.length < prefix.length) {
@@ -474,10 +479,6 @@
 			return this.replace(/\s+$/g, '');
 		};
 	}
-
-	if ('undefined' !== typeof window) {
-		window.utils = module.exports;
-	}
 }('undefined' === typeof module ? {
 	module: {
 		exports: {},
diff --git a/src/controllers/authentication.js b/src/controllers/authentication.js
index 47a15c1161..3a44f7b134 100644
--- a/src/controllers/authentication.js
+++ b/src/controllers/authentication.js
@@ -214,7 +214,7 @@ authenticationController.login = function (req, res, next) {
 			if (err) {
 				return next(err);
 			}
-			req.body.username = username ? username : req.body.username;
+			req.body.username = username || req.body.username;
 			continueLogin(req, res, next);
 		});
 	} else if (loginWith.indexOf('username') !== -1 && !validator.isEmail(req.body.username)) {
diff --git a/src/database/mongo/sorted.js b/src/database/mongo/sorted.js
index d274146f67..c52d616624 100644
--- a/src/database/mongo/sorted.js
+++ b/src/database/mongo/sorted.js
@@ -138,7 +138,7 @@ module.exports = function (db, module) {
 		}
 
 		db.collection('objects').count(query, function (err, count) {
-			callback(err, count ? count : 0);
+			callback(err, count || 0);
 		});
 	};
 
@@ -148,7 +148,7 @@ module.exports = function (db, module) {
 		}
 		db.collection('objects').count({ _key: key }, function (err, count) {
 			count = parseInt(count, 10);
-			callback(err, count ? count : 0);
+			callback(err, count || 0);
 		});
 	};
 
diff --git a/src/groups.js b/src/groups.js
index 775d19b378..5ac3116db7 100644
--- a/src/groups.js
+++ b/src/groups.js
@@ -285,7 +285,7 @@ var utils = require('../public/src/utils');
 				return callback(err);
 			}
 
-			callback(null, (parseInt(isPrivate, 10) === 0) ? false : true);
+			callback(null, parseInt(isPrivate, 10) !== 0);
 		});
 	};
 
diff --git a/src/middleware/admin.js b/src/middleware/admin.js
index fb950b7480..3e36b74db9 100644
--- a/src/middleware/admin.js
+++ b/src/middleware/admin.js
@@ -102,7 +102,7 @@ module.exports = function (middleware) {
 					authentication: results.custom_header.authentication,
 					scripts: results.scripts,
 					'cache-buster': meta.config['cache-buster'] || '',
-					env: process.env.NODE_ENV ? true : false,
+					env: !!process.env.NODE_ENV,
 					title: (acpPath || 'Dashboard') + ' | NodeBB Admin Control Panel',
 					bodyClass: data.bodyClass,
 				};
diff --git a/src/user/settings.js b/src/user/settings.js
index 115d0d92ad..870dd2e59c 100644
--- a/src/user/settings.js
+++ b/src/user/settings.js
@@ -17,7 +17,7 @@ module.exports = function (User) {
 				return callback(err);
 			}
 
-			onSettingsLoaded(uid, settings ? settings : {}, callback);
+			onSettingsLoaded(uid, settings || {}, callback);
 		});
 	};