ESLint v7.0.0-alpha.3 released

We just pushed ESLint v7.0.0-alpha.3, which is a major release upgrade of ESLint. This release adds some new features and fixes several bugs found in the previous release. This release also has some breaking changes, so please read the following closely.

Highlights

This release contains the following breaking changes:

1. Making RuleTester checks stricter.
2. Plugins are now loaded relative to the configs that reference them.
3. Use the current working directory as base path when using --config.

It also adds support for the following new language features:

1. Core rules now support globalThis.

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@7.0.0-alpha.3 --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.

Breaking Changes

• 78c8cda Breaking: RuleTester Improvements (refs eslint/rfcs#25) (#12955) (Milos Djermanovic)
• 185982d Breaking: improve plugin resolving (refs eslint/rfcs#47) (#12922) (Toru Nagashima)
• 48b122f Breaking: change relative paths with --config (refs eslint/rfcs#37) (#12887) (Toru Nagashima)

Enhancements

• e0f1b6c Update: stricter array index check in no-magic-numbers (fixes #12845) (#12851) (Milos Djermanovic)
• 362713c Update: Improve report location for template-curly-spacing (#12813) (Milos Djermanovic)
• 105384c Update: report operator location in operator-linebreak (refs #12334) (#13102) (Milos Djermanovic)
• 081e240 Update: support globalThis in no-implied-eval (fixes #12670) (#13105) (YeonJuan)
• a1370ab Update: Report constructor calls in no-obj-calls (#12909) (Milos Djermanovic)
• 085979f Update: consider env in no-implied-eval (fixes #12733) (#12757) (YeonJuan)
• e90b29b Update: Allow testing Suggestions with data in RuleTester (fixes #12606) (#12635) (Milos Djermanovic)
• 183e300 Update: support globalThis (refs #12670) (#12774) (YeonJuan)
• 1299705 Update: acorn version (#13016) (Idan Avrahami)

Bug Fixes

• 29f32db Fix: Change error message logic for implicit file ignore (fixes #12873) (#12878) (Scott Hardin)
• eb1a43c Fix: require-await ignore async generators (fixes #12459) (#13048) (Anix)
• 920465b Fix: getNameLocationInGlobalDirectiveComment end location (refs #12334) (#13086) (Milos Djermanovic)
• ae14a02 Fix: add end location to report in no-extra-bind (refs #12334) (#13083) (Milos Djermanovic)
• 0c20bc0 Fix: check assignment property target in camelcase (fixes #13025) (#13027) (YeonJuan)
• 8d50a7d Fix: add end location to report in no-prototype-builtins (refs #12334) (#13087) (Milos Djermanovic)
• 3e4e7f8 Fix: incorrect logic for required parens in no-extra-boolean-cast fixer (#13061) (Milos Djermanovic)
• aef9488 Fix: allow references to external globals in id-blacklist (fixes #12567) (#12987) (Milos Djermanovic)
• 4955c50 Fix: remove type arguments in prefer-object-spread (fixes #13058) (#13063) (Milos Djermanovic)
• dbe357d Fix: check template literal in prefer-numeric-literals (fixes #13045) (#13046) (YeonJuan)
• 2260611 Fix: added async in allow method in no-empty-function (fixes #12768) (#13036) (Anix)
• 7224eee Fix: no-plusplus allow comma operands in for afterthought (fixes #13005) (#13024) (Milos Djermanovic)
• 7598cf8 Fix: Newline before eof when creating config via --init (#12952) (Andreas Lind)
• 0243549 Fix: camelcase false positive with computed property (fixes #13022) (#13023) (Milos Djermanovic)
• 6cef0d5 Fix: Check division operator in astUtils.canTokensBeAdjacent (#12879) (Milos Djermanovic)

Documentation

• 6c069f9 Docs: Add comments to code block in example (#13089) (Kibeom Kwon)
• ee1f053 Docs: Fix typo (#13092) (Max Coplan)
• 76324ac Docs: Add further reading to rule (#13084) (Max Coplan)
• 3f7c9bf Docs: clarify variables option in no-use-before-define (fixes #12986) (#13017) (Anix)
• 9ac5b9e Docs: Clarify node_modules is ignored by default (fixes #13006) (#13054) (Mika Kuijpers)
• 0de91f3 Docs: removed correct code from incorrect eg (#13060) (Anix)
• af7af9d Docs: Update governance (#13055) (Nicholas C. Zakas)
• 79ac6cd Docs: added less confusing explanation for func-style (fixes #12900) (#13004) (Anix)

Dependency Upgrades

• 2111c52 Upgrade: esquery@1.2.0 (#13076) (Milos Djermanovic)
• 95613d4 Upgrade: espree@6.2.1 (#13026) (Kai Cataldo)

Chores

• bc0c02c Chore: added lock files to gitignore (#13015) (Anix)
• 26267ed Chore: update GitHub Actions (#12984) (Pig Fang)
• 472025f Chore: update space-before-function-paren in eslint-config-eslint (#12966) (Kai Cataldo)