@absqueued/eslint-plugin-ts-ignore-comments

This package is a custom ESLint plugin designed to enforce a standardized comment format for the // @ts-ignore directive in your codebase. This rule ensures that every instance of // @ts-ignore is accompanied by a comment explaining the reason for its usage and a plan to address it in the future. This practice helps maintain high-quality code by preventing lazy use of // @ts-ignore and promoting accountability among team members.

Purpose

In many projects, // @ts-ignore is often used to quickly bypass TypeScript errors without a clear explanation or plan to resolve the underlying issue. This can lead to technical debt and obscure the true state of the codebase. This plugin aims to improve code quality by:

• Requiring a specific comment format that includes a TODO and task number (e.g., TODO: PBI-1234 needs refactoring of types).
• Enforcing developers to document why // @ts-ignore was added and what needs to be done to remove it.
• Encouraging developers to address TypeScript issues rather than ignoring them.

Installation

You can install @absqueued/eslint-plugin-ts-ignore-comments using npm or yarn:

npm install @absqueued/eslint-plugin-ts-ignore-comments --save-dev

or

yarn add @absqueued/eslint-plugin-ts-ignore-comments --dev

Usage

After installation, add @absqueued/ts-ignore-comments to the plugins section of your .eslintrc configuration file. Then configure the rules you want to use under the rules section.

This plugin works out of the box with the default ESLint parser.

Basic setup

module.exports = {
    "plugins": [
        ...
        "@absqueued/ts-ignore-comments"
    ],
    "rules": {
        "@absqueued/ts-ignore-comments/comments": "error", // or "warn"
    }
}

Custom message setup

Add a pattern property to the options. You can define regex patterns to match your custom message requirement.

module.exports = {
    "plugins": [
        ...
        "@absqueued/ts-ignore-comments"
    ],
    "rules": {
        "@absqueued/ts-ignore-comments/comments": ["error", {
            pattern: '@ts-ignore TODO: DEGR-\\d+ .+'
        }],
    }
}

Examples

For more, checkout the example direction

// <index.ts>
// @ts-ignore TODO: DEGR-1234 this is a valid comment
const validUsage = 42;

// @ts-ignore cant fix - invalid comment
const invalidUsage = 42;

console.log({ validUsage, invalidUsage });

Supported Rules

• comments: Enforces the use of // @ts-ignore comments in TypeScript files. This rule can help in identifying places where @ts-ignore is used, potentially highlighting areas of the code that may need closer inspection or refactoring.

Licensing

The code in this project is licensed under the MIT license. See the LICENSE file for more information.