ESLint v9.35.0 released

Highlights

New Rule preserve-caught-error

One new rule has been added to the core: preserve-caught-error.

This rule enforces the use of the cause property when throwing a new error inside a catch block.

An example of incorrect code for this rule:

/* eslint preserve-caught-error: "error" */

try {
    // ...
} catch (error) {
    throw new Error("Something went wrong");
}

An example of correct code for this rule:

/* eslint preserve-caught-error: "error" */

try {
    // ...
} catch (error) {
    throw new Error("Something went wrong", { cause: error });
}

Other notable changes

• The no-empty-function and no-empty-static-block rules now provide suggestions to add an /* empty */ comment when the function or class static block is intentionally empty.
• The no-empty rule now allows empty switch statements with a comment inside the body.

Features

• 42761fa feat: implement suggestions for no-empty-function (#20057) (jaymarvelz)
• 102f444 feat: implement suggestions for no-empty-static-block (#20056) (jaymarvelz)
• e51ffff feat: add preserve-caught-error rule (#19913) (Amnish Singh Arora)

Bug Fixes

• 10e7ae2 fix: update uncloneable options error message (#20059) (soda-sorcery)
• bfa4601 fix: ignore empty switch statements with comments in no-empty rule (#20045) (jaymarvelz)
• dfd11de fix: add before and after to test case types (#20049) (Francesco Trotta)
• dabbe95 fix: correct types for no-restricted-imports rule (#20034) (Milos Djermanovic)
• ea789c7 fix: no-loss-of-precision false positive with uppercase exponent (#20032) (sethamus)

Documentation

• d265515 docs: improve phrasing - “if” → “even if” from getting-started section (#20074) (jjangga0214)
• a355a0e docs: invert comparison logic for example in no-var doc page (#20064) (OTonGitHub)
• 5082fc2 docs: Update README (GitHub Actions Bot)
• 99cfd7e docs: add missing “the” in rule deprecation docs (#20050) (Josh Goldberg ✨)
• 6ad8973 docs: update --no-ignore and --ignore-pattern documentation (#20036) (Francesco Trotta)
• 8033b19 docs: add documentation for --no-config-lookup (#20033) (Francesco Trotta)

Chores

• da87f2f chore: upgrade @eslint/js@9.35.0 (#20077) (Milos Djermanovic)
• af2a087 chore: package.json update for @eslint/js release (Jenkins)
• 7055764 test: remove tests/lib/eslint/eslint.config.js (#20065) (Milos Djermanovic)
• 84ffb96 chore: update @eslint-community/eslint-utils (#20069) (Francesco Trotta)
• d5ef939 refactor: remove deprecated context.parserOptions usage across rules (#20060) (sethamus)
• 1b3881d chore: remove redundant word (#20058) (pxwanglu)