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@kensio/yulin v0.16.0 adds CloudFront Functions typing support and ESLint config

Hugh Grigg | Kensio Software | Tuesday 16 Jun 2026

Version 0.16.0 of the @kensio/yulin package adds ESLint config and typing support for CloudFront Functions JS2 syntax.

CloudFront Functions types in JavaScript / JS2 files:

/**
* @typedef {import("@kensio/yulin/cloudfront").CloudFrontFunction.Event} CloudFrontEvent
* @typedef {import("@kensio/yulin/cloudfront").CloudFrontFunction.Request} CloudFrontRequest
* @typedef {import("@kensio/yulin/cloudfront").CloudFrontFunction.Response} CloudFrontResponse
*/

CloudFront Functions types in TypeScript files:

import { type CloudFrontFunction } from "@kensio/yulin/cloudfront";

const event: CloudFrontFunction.Event = {
  // ...
};

CloudFront Functions JS2 syntax ESLint config in eslint.config.ts:

import { defineConfig } from "eslint/config";
import tseslint from "typescript-eslint";

import { cloudFrontFunctionsJs2 } from "@kensio/yulin/eslint";

export default defineConfig(
  ...tseslint.configs.recommended,
  ...cloudFrontFunctionsJs2,
);

Then you can work on CFF JS2 in .cff.js files with some basic typing and ESLint support.

GitHub: https://github.com/KensioSoftware/yulin

npm: https://www.npmjs.com/package/@kensio/yulin