This is Vim plugin to provide text objects to select the head word of line.
This plugin depends on vim-textobj-user.
So you need to install vim-textobj-user together.
Default key mappings is ih
and ah
(operator mode).
ih
can use inner head word of line(exclude space) as text object.
ah
can use a head word of line(include space) as text object.
For example dih
to use delete inner head word of line(exclude space).