diff --git a/framework/core/js/forum/src/components/composer.js b/framework/core/js/forum/src/components/composer.js index 84729ab3b..ac32aa1db 100644 --- a/framework/core/js/forum/src/components/composer.js +++ b/framework/core/js/forum/src/components/composer.js @@ -72,7 +72,7 @@ class Composer extends Component { .on('mouseup', this.handlers.onmouseup = this.onmouseup.bind(this)); window.onbeforeunload = e => { - return this.component && this.component.preventExit(); + return (this.component && this.component.preventExit()) || null; }; }