jQuery select Whatsapp Web Chat

I need to select a chat in whatsapp web, using javascript with jQuery, and click on it, i've tryed to do that, but it does not work.

//the array chats contains all chat div elements    
var chats = jQuery(".infinite-list-item");
//for example i tryed to click one
chats[0].click();

But, nothing happend. Can anyone help me?