Add a .editorconfig file to enforce coding style

[wmcmurray]

In case you didn't know 🤷‍♂️ , this will automatically set almost any text editor to the proper config :
utf-8, 2 tabs, LF newlines and no trailing white spaces (from Mr.doob's Code Style)

It makes things much more easier ! And different config can be applied to different files types, etc.

You just need the plugin for your text editor : https://editorconfig.org/ (there is one for Atom )

If this gets merged, I guess it could be mentioned in the wiki page before last point.

[mrdoob]

Hmm, is very rare these days to see Pull Requests that don't follow that code style.
Makes me wonder if this is really needed...?

[gkjohnson]

@mrdoob FWIW I have an uncommitted .editorconfig and .eslintrc.json file (that uses the eslint-config-mdcs config) in my local three.js repo to ensure that code fits the expected style. I think maintaining these files along side the main repo will make it easier to track if the code style ever changes in the future (switching from var to let / const for example).

I would vote for adding this and an eslint file to the repo.

[gkjohnson]

If this is merged I don't think the config should enforce indent width considering it is only a visual configuration and doesn't affect the file written to disk. I often use 4 columns to indent, for example.

[wmcmurray]

Sure, don't hesitate to tweak it to your needs, I just wanted to start the debate..
You guys know this codebase much more than I do ! 🙇‍♂️

[wmcmurray]

@mrdoob well it's not "needed", but it puts a burden aside for every person wanting to contribute 🤷‍♂️

...and it's pretty common : vuejs, react, angular, laravel, php, nodejs , name it !

[mrdoob]

I see I see. Okay!

[mrdoob]

Thanks!