ESLint v9.33.0 released

Highlights

Explicit resource management support in one-var

The one-var rule now handles variables declared with the using and await using syntax, for example:

async function test() {
    using foo = 1, bar = 2;
    await using baz = 3, qux = 4;
}

using and await using declarations are part of the explicit resource management feature introduced in ES2026 JavaScript.

Global object access detection in no-restricted-globals

The no-restricted-globals rule can now catch usages of restricted globals when they’re accessed as properties of the global object, such as window.Promise. This enhanced behavior is controlled by three new options:

• checkGlobalObjectAccess: A boolean that, when enabled, reports restricted globals accessed via the global object.
• globalObjects: A list of identifiers treated as global object references. globalThis, self, and window are always included.
• globals: A list of restricted global names, each optionally paired with a custom message to report when used.

Features

• e07820e feat: add global object access detection to no-restricted-globals (#19939) (sethamus)
• 90b050e feat: support explicit resource management in one-var (#19941) (Sweta Tanwar)

Bug Fixes

• 732433c fix: allow any type for meta.docs.recommended in custom rules (#19995) (Francesco Trotta)
• e8a6914 fix: Fixed potential bug in check-emfile-handling.js (#19975) (諏訪原慶斗)

Documentation

• 34f0723 docs: playground button for TypeScript code example (#19671) (Tanuj Kanti)
• dc942a4 docs: Update README (GitHub Actions Bot)
• 5a4b6f7 docs: Update no-multi-assign.md (#19979) (Yuki Takada (Yukinosuke Takada))
• 247e156 docs: add missing let declarations in no-plusplus (#19980) (Yuki Takada (Yukinosuke Takada))
• 0d17242 docs: Update README (GitHub Actions Bot)
• fa20b9d docs: Clarify when to open an issue for a PR (#19974) (Nicholas C. Zakas)

Build Related

• 27fa865 build: use ESLint class to generate formatter examples (#19972) (Milos Djermanovic)

Chores

• 4258046 chore: update dependency @eslint/js to v9.33.0 (#19998) (renovate[bot])
• ad28371 chore: package.json update for @eslint/js release (Jenkins)
• 06a22f1 test: resolve flakiness in --mcp flag test (#19993) (Pixel998)
• 54920ed test: switch to Linter.Config in ESLintRules type tests (#19977) (Francesco Trotta)