Auto save

Probably only me needs it is this a option on the forum ? My laptop is charger is goosed so using my phone i just wrote a big thread and  lost it as my phone recived a message and i clicked on it lost my post on here just woundered if its a easy add on the site ?

Whats the big auto save button save just seen it ha ha ?

Happens to quite often when I type messages on my phone at work