map vim leader key to backspace

Question

The vim documention on how to set the default leader key ( :h mapleader) provides one simple example:

:let mapleader = ","

I want to map it to backspace and tried a bunch of options, this being the first one:

:let mapleader="<BS>"

But nothing seemed to work.

Answer 1

To make it work I had to use:

:let mapleader="\<BS>"

Another option is to not override the default \ leader key, but map backspace to it, effectively ending up with two simultaneous leader keys:

map <BS> <Leader>