Use ESLint

[ghost]

We may use standard for rules.

[J0WI]

See #8843 and #9347

[ghost]

@J0WI I suggested https://github.com/standard/standard instead of a homebrewn .eslintrc.yml file. This pull request is also out of date ("This branch has conflicts that must be resolved").

[jeremyn]

Despite the name, standardjs is not an official standard, it's just popular with some developers. It also has some unusual requirements like not allowing semicolons. Related Hacker News discussion: https://news.ycombinator.com/item?id=14045617.

Two other popular eslint configurations are from Google and Airbnb. Probably the ideal way of deciding what to use it to try all three of them and figure out which configuration most closely matches what we already have.

[ghost]

@jeremyn It doesn't claim to be one: https://github.com/standard/standard#but-this-isnt-a-real-web-standard

[ghost]

#10897

[Hainish]

Can this be closed with the #10852 merge?

[ghost]

@Hainish No, it should be closed when one of the JS style guide PRs will be merged.

[ghost]

@Hainish Like #10909.

[ghost]

@Hainish I already created the PRs for each code style. Let's discuss which to use. Personally, I would prefer either Standard or Google.

[ghost]

I hope we'll finish this before the next release (#10888.)

[Bisaloo]

Should help with #4039.