New Nov 15, 2024

ESLint v9.15.0 released

Libraries, Frameworks, etc. All from ESLint Blog View ESLint v9.15.0 released on eslint.org

This release updates the @eslint/plugin-kit dependency to the latest version 0.2.3 which includes the fix for security advisory GHSA-7q7g-4xm8-89cq.

Highlights

meta.defaultOptions

Rules can now specify default options. ESLint will recursively merge any user-provided options elements on top of the default elements.

This feature makes it easier to work with options in rules.

// my-rule.js
export default {
    meta: {
        defaultOptions: [{
            alias: "basic",
            ignoreClassFields: false
        }],
        schema: [{
            type: "object",
            properties: {
                alias: {
                    type: "string"
                },
                ignoreClassFields: {
                    type: "boolean"
                }
            },
            additionalProperties: false
        }]
    },
    create(context) {

        // `context.options` is guaranteed to be an array with a single object
        // that has a string property `alias` and a boolean property `ignoreClassFields`.
        // If the rule is enabled with no options specified in the configuration file,
        // `alias` will be `"basic"`, and `ignoreClassFields` will be `false`.
        const [{ alias, ignoreClassFields }] = context.options;

        return { /* ... */ };
    }
};

This feature also allows document generators, other tools and integrations, and end users to easily find the default options for rules.

Other notable changes

Features

Bug Fixes

Documentation

Chores

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