CSS version number (prevent caching)

[badlydrawnrob]

This will make sure css is not cached in the browser ...
Running this with time npm run build in terminal takes 3.95s (1s more than without it)

Works

You've got to both wrap in quotes " ", and escape them \" ...

--variable-json css-version=\"$(npm pkg get version)\"

Does not work

-- Pandoc and get npm version number
--variable-json css-version=$(npm pkg get version)
-- For some reason this fails
--variable-json css-version=$npm_package_version

npm pkg get version returns a "string" value though, and we'd need a non-string value for our ?=version number or else we'll get an unexpected " " error.