watch command is useful when you want your book to be rendered on every
file change. You could repeatedly issue
mdbook build every time a file is
changed. But using
mdbook watch once will watch your files and will trigger a
build automatically whenever you modify a file.
watch command can take a directory as an argument to use as the book’s
root instead of the current working directory.
mdbook watch path/to/book
When you use the
-o) option, mdbook will open the rendered book in
your default web browser.
-d) option allows you to change the output directory for the
book. Relative paths are interpreted relative to the book’s root directory. If
not specified it will default to the value of the
build.build-dir key in
book.toml, or to