In the last few days, Facebook has changed the “invite your friends” functionality, which powers suggestions and invitations to events, pages, etc.

The result is that old Javascript codes that allowed you to invite ALL your Facebook friends to an event in a snap are now broken.

To select all your friends in the new interface you can use this Method

• Open event or page >Click on  Invite Friends button 

• Scroll down or to that part what you want invite > Copy this to adress field or make this code bookmark

javascript:elms=document.getElementsByName("checkableitems[]");for (i=0;i<elms.length;i++){if (elms[i].type="checkbox" )elms[i].click()};

•  After that write manually this at the start:

javascript:

WORKING !!!