diff --git a/Makefile b/Makefile
index 1f54c32..382b18b 100644
--- a/Makefile
+++ b/Makefile
@@ -56,7 +56,7 @@ distclean: clean
 .PHONY: lint
 lint:
 	$(MAKE) -C js/ lint
-	#$(MAKE) -C js/mobile lint
+	$(MAKE) -C js/mobile lint
 
 clean:
 	make -C js clean
diff --git a/js/mobile/Makefile b/js/mobile/Makefile
index 862dffe..eb39408 100644
--- a/js/mobile/Makefile
+++ b/js/mobile/Makefile
@@ -1,6 +1,7 @@
 
 # caution: order is important
 MOBILESRC=				\
+	  prelude.js			\
 	  component.js			\
 	  loginscreen.js		\
 	  mailview.js			\
@@ -8,6 +9,9 @@ MOBILESRC=				\
 	  utils.js			\
 	  app.js			\
 
+lint: pmgmanagerlib-mobile.js
+	eslint $^
+
 pmgmanagerlib-mobile.js: ${MOBILESRC}
 	cat $^ >$@.tmp
 	mv $@.tmp $@
diff --git a/js/mobile/app.js b/js/mobile/app.js
index e2e13e4..4d00c12 100644
--- a/js/mobile/app.js
+++ b/js/mobile/app.js
@@ -1,5 +1,5 @@
-var $$ = Dom7;
-var app = new Framework7({
+$$ = Dom7;
+app = new Framework7({
     root: '#app',
     init: false,
     name: 'Proxmox Mail Gateway',
@@ -73,6 +73,6 @@ var app = new Framework7({
     ],
 });
 
-let quarlist = new QuarantineView();
+let _quarantine_view = new QuarantineView();
 
 app.init();
diff --git a/js/mobile/mailview.js b/js/mobile/mailview.js
index 3645b81..bc2b035 100644
--- a/js/mobile/mailview.js
+++ b/js/mobile/mailview.js
@@ -52,7 +52,8 @@ class MailView extends Component {
 		</div>
 	    </div>
 	    <div class="page-content">
-		<iframe frameborder=0 width="100%" height="100%" sandbox="allow-same-origin" src="/api2/htmlmail/quarantine/content?id={{mailid}}"></iframe>
+		<iframe frameborder=0 width="100%" height="100%" sandbox="allow-same-origin"
+		    src="/api2/htmlmail/quarantine/content?id={{mailid}}"></iframe>
 	    </div>
 	</div>
 	`;
diff --git a/js/mobile/prelude.js b/js/mobile/prelude.js
new file mode 100644
index 0000000..4420f58
--- /dev/null
+++ b/js/mobile/prelude.js
@@ -0,0 +1,4 @@
+/* global Framework7, Template7, Dom7 */
+
+var $$ = Dom7;
+var app, PMG; // set in app.js
diff --git a/js/mobile/quarantineview.js b/js/mobile/quarantineview.js
index 721c28b..4a3ad54 100644
--- a/js/mobile/quarantineview.js
+++ b/js/mobile/quarantineview.js
@@ -6,7 +6,8 @@ class QuarantineView extends Component {
 		<div class="navbar">
 		    <div class="navbar-inner">
 			<div class="left">
-			    <img class="logo-navbar" style="padding: 0 10px" src="pve2/images/logo-128.png" height=32 />
+			    <img class="logo-navbar" style="padding: 0 10px"
+			        src="pve2/images/logo-128.png" height=32 />
 			</div>
 			<div class="title">Mail Gateway</div>
 		    </div>
@@ -142,7 +143,7 @@ class QuarantineView extends Component {
 	    });
 
 	    // setup pull to refresh
-	    $$('.ptr-content').on('ptr:refresh', (e) => {
+	    $$('.ptr-content').on('ptr:refresh', (ev) => {
 		me.setItems([
 		    { skel: true, divider: true },
 		    { skel: true },
@@ -167,7 +168,7 @@ class QuarantineView extends Component {
 			grouperFn: (val) => PMG.Utils.unixToIso(val.time),
 		    });
 		}).catch(PMG.Utils.showError).then(() => {
-		    e.detail();
+		    ev.detail();
 		});
 	    });
 
@@ -220,8 +221,8 @@ class QuarantineView extends Component {
 	let date = starttime;
 	if (!(starttime instanceof Date)) {
 	    // we assume an ISO string
-	    if (starttime == '') {
-		return;
+	    if (starttime === '') {
+		return null;
 	    }
 	    date = new Date(PMG.Utils.isoToUnix(starttime)*1000);
 	}
@@ -238,8 +239,8 @@ class QuarantineView extends Component {
 	var me = this;
 	let date = endtime;
 	if (!(endtime instanceof Date)) {
-	    if (endtime == '') {
-		return;
+	    if (endtime === '') {
+		return null;
 	    }
 	    // we assume an ISO string
 	    date = new Date(PMG.Utils.isoToUnix(endtime)*1000);
@@ -323,7 +324,7 @@ class QuarantineView extends Component {
 	    for (let i = 0; i+offset < items.length; i++) {
 		let item = items[i+offset];
 		let curgroup = options.grouperFn(item);
-		if (curgroup != lastgroup) {
+		if (curgroup !== lastgroup) {
 		    me.vList.insertItemBefore(i+offset++, {
 			divider: true,
 			group: curgroup,
diff --git a/js/mobile/utils.js b/js/mobile/utils.js
index f1acb08..9e6eb66 100644
--- a/js/mobile/utils.js
+++ b/js/mobile/utils.js
@@ -1,4 +1,4 @@
-var PMG = {
+PMG = {
     Utils: {
 	getCookie(name) {
 	    let cookies = document.cookie.split(/;\s*/);
@@ -73,7 +73,7 @@ var PMG = {
 	    let mail, action, date, username, ticket;
 	    if (queryObj.ticket) {
 		let tocheck = decodeURIComponent(queryObj.ticket);
-		let match = tocheck.match(/^PMGQUAR:([^\s\:]+):/);
+		let match = tocheck.match(/^PMGQUAR:([^\s:]+):/);
 		if (match) {
 		    ticket = tocheck;
 		    username = match[1];