ESLint v9.25.0 released

Highlights

allowObjects option for no-restricted-properties

This release adds a new option allowObjects to the no-restricted-properties rule. The allowObjects option allows you to restrict a property globally but allow specific objects to use it.

/* eslint no-restricted-properties: ["error", { "property": "push", "allowObjects": ["router", "history"] } ] */

router.push('/home');   // allowed
history.push('/about'); // allowed

myArray.push("/info");  // not allowed

TypeScript Syntax Support in Core Rules

As announced in the ESLint v9.23.0 release blog post, we are actively working to add TypeScript syntax support to core rules.

ESLint v9.25.0 introduces full TypeScript syntax support for four more core rules. These rules are:

• no-empty-function. This rule has new TypeScript-specific options in the allow array: "privateConstructors", "protectedConstructors", "decoratedFunctions", and "overrideMethods".
• no-invalid-this.
• no-loop-func.
• no-unused-expressions.

These rules can now be used to lint TypeScript files as well as regular JavaScript. To lint TypeScript code, be sure to use @typescript-eslint/parser, or another compatible parser.

Features

• dcd95aa feat: support TypeScript syntax in no-empty-function rule (#19551) (sethamus)
• 77d6d5b feat: support TS syntax in no-unused-expressions (#19564) (Sweta Tanwar)
• 90228e5 feat: support JSRuleDefinition type (#19604) (루밀LuMir)
• 59ba6b7 feat: add allowObjects option to no-restricted-properties (#19607) (sethamus)
• db650a0 feat: support TypeScript syntax in no-invalid-this rule (#19532) (Tanuj Kanti)
• 9535cff feat: support TS syntax in no-loop-func (#19559) (Nitin Kumar)

Bug Fixes

• 910bd13 fix: nodeTypeKey not being used in NodeEventGenerator (#19631) (StyleShit)

Documentation

• ca7a735 docs: update no-undef-init when not to use section (#19624) (Tanuj Kanti)
• 1b870c9 docs: use eslint-config-xo in the getting started guide (#19629) (Nitin Kumar)
• 5d4af16 docs: add types for multiple rule options (#19616) (Tanuj Kanti)
• e8f8d57 docs: Update README (GitHub Actions Bot)
• a40348f docs: no-use-before-define tweaks (#19622) (Kirk Waiblinger)
• 0ba3ae3 docs: Update README (GitHub Actions Bot)
• 865dbfe docs: ensure “learn more” deprecation links point to useful resource (#19590) (Kirk Waiblinger)
• f80b746 docs: add known limitations for no-self-compare (#19612) (Nitin Kumar)
• 865aed6 docs: Update README (GitHub Actions Bot)

Chores

• 88dc196 chore: upgrade @eslint/js@9.25.0 (#19636) (Milos Djermanovic)
• 345288d chore: package.json update for @eslint/js release (Jenkins)
• affe6be chore: upgrade trunk (#19628) (sethamus)
• dd20cf2 test: fix no-loop-func test with duplicate variable reports (#19610) (Milos Djermanovic)
• bd05397 chore: upgrade @eslint/* dependencies (#19606) (Milos Djermanovic)
• 22ea18b chore: replace invalid int type with number inside JSDocs. (#19597) (Arya Emami)