2 files changed, 1 insertions, 21 deletions
diff --git a/assets/js/src/App.js b/assets/js/src/App.js
index 9aa97061..12889c58 100644
--- a/assets/js/src/App.js
+++ b/assets/js/src/App.js
@@ -112,23 +112,3 @@ Kanboard.App.prototype.showLoadingIcon = function() {
 Kanboard.App.prototype.hideLoadingIcon = function() {
     $("#app-loading-icon").remove();
 };
-
-Kanboard.App.prototype.isVisible = function() {
-    var property = "";
-
-    if (typeof document.hidden !== "undefined") {
-        property = "visibilityState";
-    } else if (typeof document.mozHidden !== "undefined") {
-        property = "mozVisibilityState";
-    } else if (typeof document.msHidden !== "undefined") {
-        property = "msVisibilityState";
-    } else if (typeof document.webkitHidden !== "undefined") {
-        property = "webkitVisibilityState";
-    }
-
-    if (property !== "") {
-        return document[property] == "visible";
-    }
-
-    return true;
-};
diff --git a/assets/js/src/BoardPolling.js b/assets/js/src/BoardPolling.js
index ba38b779..44ad5379 100644
--- a/assets/js/src/BoardPolling.js
+++ b/assets/js/src/BoardPolling.js
@@ -13,7 +13,7 @@ Kanboard.BoardPolling.prototype.execute = function() {
 };
 
 Kanboard.BoardPolling.prototype.check = function() {
-    if (this.app.isVisible() && !this.app.get("BoardDragAndDrop").savingInProgress) {
+    if (KB.utils.isVisible() && !this.app.get("BoardDragAndDrop").savingInProgress) {
         var self = this;
         this.app.showLoadingIcon();