ESLint v5.0.0-alpha.4 released

by Brandon Mills - 28 May 2018

We just pushed ESLint v5.0.0-alpha.4, which is a major release upgrade of ESLint. This release adds some new features and fixes several bugs found in the previous release.

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.


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


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-alpha.4 --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.


  • 465e615 New: prompt users before installing dependencies (#10353) (Pig Fang)


Bug Fixes



  • b9b23a9 Chore: rm unused argument (#10400) (薛定谔的猫)
  • e25fc22 Chore: remove assert.doesNotThrow in tests (#10199) (Ruben Bridgewater)
  • 4e5e9be Chore: avoid unnecessary filesystem accesses during config search (#10359) (Teddy Katz)
  • 363da01 Chore: avoid code duplication in rule severity checking (#10358) (Teddy Katz)