ESLint v1.5.0 released

by Nicholas C. Zakas - 18 September 2015

We just pushed ESLint v1.5.0, which is a minor release upgrade of ESLint. This release adds some new features and fixes several bugs found in the previous release.


Here are some highlights of changes in this release.

Autofixing of more rules

ESLint v1.5.0 introduces several more autofixing rules to use with the --fix command line argument. In this release, we have implemented autofixing in these rules:

  1. eol-last
  2. indent
  3. no-extra-semi
  4. no-spaced-func
  5. no-trailing-spaces
  6. space-after-keywords
  7. space-before-blocks
  8. space-before-keywords
  9. space-infix-ops
  10. space-return-throw-case
  11. space-before-function-paren

When you run ESLint on the command line with the --fix flag, it will automatically fix any problems that it can (not all problems are fixable at once) and will not report the problems that were fixed.

This feature is still considered experimental but is backed up by a lot of unit tests verifying correctness. Still, we expect to find some edge cases that we didn't anticipate, so we'd appreciate your feedback.

Limitations: the --fix flag does not work for piped-in text and has no effect on code that uses ESLint processors.

--debug Flag

Sometimes ESLint doesn't do what it's supposed to do, and in that case, the new --debug flag can help. When using this flag, the command line will output debug information to the console, allowing you to see what ESLint is doing and providing valuable information to determine if there's a bug. We may ask for the debug information when you report a possible bug.


  • New: Add --debug flag to CLI (fixes #2692) (Nicholas C. Zakas)


  • Update: key-spacing should allow 1+ around colon (fixes #3363) (Burak Yigit Kaya)
  • Update: Add configuration option to space-before-blocks (fixes #3758) (Phil Vargas)
  • Update: auto fix for space-before-function-paren rule (fixes #3766) (alberto)
  • Update: Implement auto fix for eol-last rule (fixes #3725) (Gyandeep Singh)
  • Update: Implement auto fix for indent rule (fixes #3734) (Gyandeep Singh)
  • Update: Implement auto fix for no-extra-semi rule (fixes #3745) (Gyandeep Singh)
  • Update: Implement auto fix for no-spaced-func rule (fixes #3728) (Gyandeep Singh)
  • Update: Implement auto fix for no-trailing-spaces rule (fixes #3723) (Gyandeep Singh)
  • Update: Implement auto fix for space-after-keywords rule (fixes #3773) (Gyandeep Singh)
  • Update: Implement auto fix for space-before-blocks rule (fixes #3776) (Gyandeep Singh)
  • Update: Implement auto fix for space-before-keywords rule (fixes #3771) (Gyandeep Singh)
  • Update: Implement auto fix for space-infix-ops rule (fixes #3801) (Gyandeep Singh)
  • Update: Implement auto fix for space-return-throw-case (fixes #3732) (Gyandeep Singh)
  • Update: Refactors the traversing logic (refs #3530) (Toru Nagashima)

Bug Fixes

  • Fix: comma-dangle had not been checking imports/exports (fixes #3794) (Toru Nagashima)
  • Fix: no-warning-comments can't be set via config comment (fixes #3619) (Burak Yigit Kaya)
  • Fix: semi-spacing had conflicted with block-spacing (fixes #3721) (Toru Nagashima)
  • Fix: space-before-blocks had conflicted arrow-spacing (fixes #3769) (Toru Nagashima)
  • Fix: space-before-keywords fails to handle some cases (fixes #3756) (Marko Raatikka)
  • Fix: Directory ignoring should work (fixes #3812) (Nicholas C. Zakas)
  • Fix: Ensure **/node_modules works in ignore files (fixes #3788) (Nicholas C. Zakas)
  • Fix: Ensure ./ works correctly with CLI (fixes #3792) (Nicholas C. Zakas)
  • Fix: env-specified ecmaFeatures had been wrong (fixes #3735) (Toru Nagashima)
  • Fix: false alarm of semi-spacing with semi set to never (fixes #1983) (Chen Yicai)
  • Fix: function body indent issues (fixes #3614, fixes #3799) (Gyandeep Singh)
  • Fix: invalidate cache when config changes. (fixes #3770) (royriojas)
  • Fix: jsx-quotes exception for attributes without value (fixes #3793) (Mathias Schreck)
  • Fix: space checking between tokens (fixes #2211) (Nicholas C. Zakas)
  • Fix: tests fail due to differences in temporary paths. (fixes #3778) (royriojas)


  • Docs: Add if-else example (fixes #3722) (Ian VanSchooten)
  • Docs: add more examples + tests for block-scoped-var (fixes #3791) (JT)
  • Docs: Change example wording from warnings to problems (fixes #3676) (Ian VanSchooten)
  • Docs: Clarify node types in no-multi-spaces (fixes #3781) (Nicholas C. Zakas)
  • Docs: Fix closing code fence on cli docs (Ian VanSchooten)
  • Docs: Update new-cap docs (fixes #3798) (Nicholas C. Zakas)
  • Docs: Update no-undef-init docs (fixes #3170) (Nicholas C. Zakas)
  • Docs: Update no-unused-expressions docs (fixes #3685) (Nicholas C. Zakas)
  • Build: Generate formatter example docs (fixes #3560) (Ian VanSchooten)