ESLint v5.0.0-rc.0 released

Note: This version of ESLint is not ready for production use and is provided to gather feedback from the community before releasing the final version. Please let us know if you having any problems or feedback by creating issues on our GitHub repo or joining our Gitter channel.

Highlights

This is a summary of the major changes you need to know about for this version of ESLint.

Installing

Since this is a pre-release version, you will not automatically be upgraded by npm. You must specify the next tag when installing:

npm i eslint@next --save-dev

You can also specify the version directly:

npm i eslint@5.0.0-rc.0 --save-dev

Migration Guide

As there are a lot of changes, we’ve created a migration guide describing the changes in great detail along with the steps you should take to address them. We expect that most users should be able to upgrade without any build changes, but the migration guide should be a useful resource if you encounter problems.

Enhancements

• abf400d Update: Add ignoreDestructing option to camelcase rule (fixes #9807) (#10373) (Andrew Lunny)
• 640bf07 Update: Fixes multiline no-warning-comments rule. (fixes #9884) (#10381) (Scott Stern)
• dc4075e Update: fix false negative in no-use-before-define (fixes #10227) (#10396) (Toru Nagashima)
• 917108d Update: Add requireParamType option to valid-jsdoc (fixes #6753) (#10220) (Tomasz Sterna)

Bug Fixes

• fe8bec3 Fix: fix writing config file when source is prompt (#10422) (Pig Fang)
• 3e9f33a Fix: prevent crashing from JSON parsing error (fixes #10364) (#10376) (Pig Fang)
• 636457d Fix: parse later ES files in eslint --init (fixes #10003) (#10378) (Pig Fang)

Documentation

• 3721841 Docs: Add new experimental syntax policy to README (fixes #9804) (#10408) (Kevin Partington)
• d0aae3c Docs: Create docs landing page (#10453) (Kevin Partington)
• 1984c21 Docs: move custom parsers docs into a page (fixes #9919) (#10431) (Pig Fang)
• 400d4b5 Docs: Add rest and spread operator changes to migration guide (#10416) (Yannick Croissant)

Dependency Upgrades

• e2b394d Upgrade: espree and eslint-scope to rc versions (#10457) (Kevin Partington)
• e7bdd02 Upgrade: Consume espree@4.0.0-alpha.1 (#10410) (Kevin Partington)

Build Related

• 831c39a Build: Adding rc release script to package.json (#10456) (Kevin Partington)

Chores

• a370da2 Chore: small opt to improve readability (#10241) (薛定谔的猫)