Adds a new docs website, built with Gatsby JS, to replace the old Jekyll site. Source code for the new site lives in /www (although markdown and YML data still comes from the legacy /docs folder).
Changes to either markdown or website source code can be previewed on Netlify. The react-js bot should automatically add comments to each PR with preview links. (This preview is generated by running the newly-added yarn build:docs command in the root package.json.)
The majority of the changes in this PR are contained within the new /www directory. However some minor modifications have been made to existing content in the /docs directory:
* Modified frontmatter author block to always be an array
* Small markdown formatting tweaks
* Reminder: strip quotes from attributes with JS code
Web developers who are used to standards-compliant HTML and XML will, out of habit, put quotes around all attributes because the standards require them. Other templating systems like ASP.NET also require (or at least allow) quotes around attributes that contain code. This behavior will get users into trouble in JSX because a quoted attribute is always treated as a string literal, even if it contains curly-braced javascript code. Let's add to the docs to help newbies evade this problem.
* Tweak wording
* use an easier word
The word `mandatory` is relatively difficult for people with ESL (English as a second language), so I propose an alternative word.
This would be much easier to understand.
* use simpler word
The code section above these changes defines a `formatName` function
that expects a parameter `user`. The code section containing these
changes incorrectly called `formatName(user.name)`. For those following
along with CodePen, this section should correctly call
`formatName(user)`.
Dan Abramov
Brian Vaughn
Moacir Rosa
Justin Grant
DQNEO
Shubheksha Jalan
Andreas Möller
Lewis Blackwood
Kevin Lacker