What does it take to support Node.js ESM?

This page summarizes the projects mentioned and recommended in the original post on dev.to

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  • plugins

    🍣 The one-stop shop for official Rollup plugins (by rollup)

    The only workaround to have an isomorphic __dirname or __filename to be used for both "cjs" and "esm" without using build-time tools like @rollup/plugin-replace or esbuild "define" would be using a library like filedirname that does a trick inspecting error stacks, it's clearly not the cleanest solution.

  • TypeScript

    TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

    Until this issue TypeScript#33069 is closed, TypeScript doesn't have complete support for it, fortunately, there are 2 workarounds:

  • SurveyJS

    Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.

  • bob

    Build tool used in libraries maintained by The Guild (by kamilkisiela)

    In The Guild we use this method using tooling that creates the temporary package.json automatically. See bob-the-bundler & bob-esbuild

  • bob-esbuild

    Building and Running TypeScript projects efficiently with rollup + esbuild

    In The Guild we use this method using tooling that creates the temporary package.json automatically. See bob-the-bundler & bob-esbuild

  • tsup

    The simplest and fastest way to bundle your TypeScript libraries.

    The best solution for this is to have ESM examples in a monorepo testing firsthand if everything with the logic included doesn't break, using tools that output both CommonJS & ESM like tsup might become very handy, but that might not be straightforward, especially for big projects.

  • ts-jest

    A Jest transformer with source map support that lets you use Jest to test projects written in TypeScript.

    There are workarounds, but nothing actually works in 100% of the possible use-cases (see for example, ts-jest issue), and for that reason, we recommend tooling that enables this type of building without needing any workaround, usually using Rollup and/or esbuild.

  • Stack

    Tech Stack developed by The Guild (by the-guild-org)

    In The Guild we use this method using tooling that creates the temporary package.json automatically. See bob-the-bundler & bob-esbuild

  • InfluxDB

    Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  • Rollup

    Next-generation ES module bundler

    There are workarounds, but nothing actually works in 100% of the possible use-cases (see for example, ts-jest issue), and for that reason, we recommend tooling that enables this type of building without needing any workaround, usually using Rollup and/or esbuild.

  • esbuild

    An extremely fast bundler for the web

    There are workarounds, but nothing actually works in 100% of the possible use-cases (see for example, ts-jest issue), and for that reason, we recommend tooling that enables this type of building without needing any workaround, usually using Rollup and/or esbuild.

NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.

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