Move PageExitPrevention to its own file

1 files changed, 0 insertions, 46 deletions

diff --git a/ext/bg/js/settings.js b/ext/bg/js/settings.js
index abe6f389..9e9604e2 100644
--- a/ext/bg/js/settings.js
+++ b/ext/bg/js/settings.js
@@ -223,52 +223,6 @@ $(document).ready(() => onReady());
 
 
 /*
- * Page exit prevention
- */
-
-class PageExitPrevention {
-    constructor() {
-    }
-
-    start() {
-        PageExitPrevention._addInstance(this);
-    }
-
-    end() {
-        PageExitPrevention._removeInstance(this);
-    }
-
-    static _addInstance(instance) {
-        const size = PageExitPrevention._instances.size;
-        PageExitPrevention._instances.set(instance, true);
-        if (size === 0) {
-            window.addEventListener('beforeunload', PageExitPrevention._onBeforeUnload);
-        }
-    }
-
-    static _removeInstance(instance) {
-        if (
-            PageExitPrevention._instances.delete(instance) &&
-            PageExitPrevention._instances.size === 0
-        ) {
-            window.removeEventListener('beforeunload', PageExitPrevention._onBeforeUnload);
-        }
-    }
-
-    static _onBeforeUnload(e) {
-        if (PageExitPrevention._instances.size === 0) {
-            return;
-        }
-
-        e.preventDefault();
-        e.returnValue = '';
-        return '';
-    }
-}
-PageExitPrevention._instances = new Map();
-
-
-/*
  * Appearance
  */