Add jshint

assets/js/src/App.js

@@ -135,7 +135,7 @@ Kanboard.App.prototype.datePicker = function() {
 Kanboard.App.prototype.tagAutoComplete = function() {
     $(".tag-autocomplete").select2({
         tags: true
-    })
+    });
 };
 
 Kanboard.App.prototype.autoComplete = function() {
@@ -144,7 +144,7 @@ Kanboard.App.prototype.autoComplete = function() {
         var field = input.data("dst-field");
         var extraField = input.data("dst-extra-field");
 
-        if ($('#form-' + field).val() == '') {
+        if ($('#form-' + field).val() === '') {
             input.parent().find("button[type=submit]").attr('disabled','disabled');
         }
 
@@ -189,7 +189,7 @@ Kanboard.App.prototype.isVisible = function() {
         property = "webkitVisibilityState";
     }
 
-    if (property != "") {
+    if (property !== "") {
         return document[property] == "visible";
     }
 

assets/js/src/BoardDragAndDrop.js

@@ -45,7 +45,7 @@ Kanboard.BoardDragAndDrop.prototype.dragAndDrop = function() {
 
     if (isMobile.any) {
         $(".task-board-sort-handle").css("display", "inline");
-        params["handle"] = ".task-board-sort-handle";
+        params.handle = ".task-board-sort-handle";
     }
 
     // Set dropzone height to the height of the table cell

assets/js/src/Namespace.js

@@ -1,3 +1 @@
-'use strict';
-
 var Kanboard = {};

assets/js/src/Screenshot.js

@@ -44,7 +44,7 @@ Kanboard.Screenshot.prototype.initialize = function() {
 
 // Destroy contentEditable element
 Kanboard.Screenshot.prototype.destroy = function() {
-    if (this.pasteCatcher != null) {
+    if (this.pasteCatcher !== null) {
         document.body.removeChild(this.pasteCatcher);
     }
     else if (document.getElementById("screenshot-pastezone")) {