ESLint v10.11.0 released

Highlights

Faster startup and linting

This release includes a set of performance improvements across ESLint’s core linting pipeline and the stylish formatter. Linting results and the public API are unchanged: the same files produce the same messages as before, just faster.

The main improvements are:

• Startup. Loading the eslint package no longer eagerly initializes the JSON Schema validator used for rule options. It’s now created the first time a rule’s options actually need to be validated, which removes about 45 modules from the initial dependency graph and reduces package load time by 20–25%.
• Rule execution. When ESLint traverses a file’s structure, it has to decide, for every piece of code, which rules are interested in it and then call those rules. This is the most frequently executed part of the linting process, and it now takes a shorter route in the most common cases. Common node selector types are handled by fast paths, and rule visitors are invoked directly whenever possible instead of through a wrapper function on every node.
• Overhead per reported problem. When a rule reports a problem, ESLint needs to perform several processing steps before displaying a message. Some of those steps have been made cheaper: placeholders in message templates are only filled in when necessary, autofixes are checked for validity without serializing each one to JSON, and one fixer object is shared by all problems reported in a file instead of creating one per fix. Also, files without any eslint-enable or eslint-disable comments now skip the directive processing step altogether.
• Default formatter. The default stylish formatter avoids stripping terminal control characters from strings that don’t contain any and no longer runs a regular expression on every message, which speeds up printing large numbers of problems.

Actual results will vary depending on your configuration and hardware, but projects using many core rules should see a noticeable improvement in both startup time and overall linting time.

Features

• d136fa4 feat: object-shorthand handle quoted properties for ignoreConstructors (#21271) (Pavel)
• 397b3b8 feat: report unsafe labeled continue in no-unsafe-finally rule (#21316) (electrohyun)
• d3dd47f feat: only exempt new-cap built-ins that reference the global (#21290) (sethamus)

Bug Fixes

• 22b09f5 fix: ignore __proto__ properties in prefer-object-spread (#21311) (xbinaryx)
• b684bb1 fix: make TimePass.parse optional in types and docs (#21313) (ntnyq)
• 26d11bc fix: don’t report __proto__ properties in object-shorthand (#21310) (xbinaryx)

Documentation

• 9ecfdc5 docs: note that --cache can serve stale results for cross-file rules (#21312) (bytedoe)
• 6c789ff docs: Update README (GitHub Actions Bot)
• 5997825 docs: clarify preserve-caught-error known limitation (#21294) (Akinyemi Toluwalase)

Chores

• 520dd77 perf: Implement fast paths in critical areas (#21210) (Nicholas C. Zakas)
• 92086c8 test: update EMFILE error generation for Node.js 26.9.0 compatibility (#21330) (Francesco Trotta)
• 9ac7eb6 chore: update github/codeql-action action to v4.38.0 (#21331) (renovate[bot])
• 24310e3 chore: update ecosystem plugins (#21324) (ESLint Bot)
• 45ad79e ci: bump pnpm/action-setup from 6.0.10 to 6.1.0 (#21318) (dependabot[bot])
• ac74e37 chore: Add AGENTS.md with AI disclosure requirements (#21221) (Nicholas C. Zakas)
• c832660 chore: Upgrade Stylelint to the latest version in docs (#21245) (Jung Hyeon Jun)
• f9f88fc chore: update ecosystem plugins (#21308) (ESLint Bot)
• fc81076 ci: add more types integration tests (#20395) (Nitin Kumar)