The latest articles on DEV Community by Youssef Selk (@ussfslk). https://dev.to/ussfslk https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3889825%2F0df16fcc-fe18-41aa-9df2-470a7fbcf36d.jpg https://dev.to/ussfslk en Youssef Selk Tue, 21 Apr 2026 00:40:19 +0000 https://dev.to/ussfslk/i-got-tired-of-messy-typescript-migrations-in-nodejs-so-i-built-fast-ts-integrator-1nhb https://dev.to/ussfslk/i-got-tired-of-messy-typescript-migrations-in-nodejs-so-i-built-fast-ts-integrator-1nhb <p>Adding TypeScript to an existing Node.js project sounds simple until it isn’t.</p> <p>A few files in, things usually start drifting:</p> <ul> <li>tsconfig.json stops matching the actual runtime</li> <li>CommonJS and ESM start fighting each other</li> <li>mixed .js and .ts files make the project harder to reason about</li> <li>test and lint setup adds even more friction</li> </ul> <p>I kept running into that same wall, so I built a small CLI to make the setup predictable.</p> <h2> What it is </h2> <p>fast-ts-integrator is a CLI that helps add TypeScript to a new or existing Node.js project with an interactive setup.</p> <p>It lets you choose:</p> <ul> <li>ES Modules or CommonJS</li> <li>tsx or ts-node</li> <li>Biome or ESLint + Prettier</li> <li>Vitest or Jest Then it installs what is needed, generates the config, and adds the scripts so you can actually start working instead of fighting setup.</li> </ul> <h2> Why I built it </h2> <p>Most of the pain was never “TypeScript itself”.</p> <p>It was the setup around it:</p> <ul> <li>choosing the right module strategy</li> <li>keeping runtime behavior consistent</li> <li>avoiding broken imports after migration</li> <li>wiring linting and testing without turning the project into config soup</li> </ul> <p>I wanted something practical that works for real Node.js projects, not just empty demos.</p> <h2> Quick start </h2> <div class="highlight js-code-highlight"> <pre class="highlight shell"><code>npx fast-ts-integrator </code></pre> </div> <p>or<br> </p> <div class="highlight js-code-highlight"> <pre class="highlight shell"><code>npx fast-ts </code></pre> </div> <h2> Example flow </h2> <p>The CLI walks through a few choices:</p> <ol> <li>module system</li> <li>execution engine</li> <li>linter/formatter</li> <li>test framework</li> </ol> <p>After that, it scaffolds the setup and updates package.json for you.</p> <h2> Links </h2> <p>npm: <a href="https://www.npmjs.com/package/fast-ts-integrator" rel="noopener noreferrer">npm package</a><br> GitHub: <a href="https://github.com/YoussefSelk/fast-ts-integrator" rel="noopener noreferrer">Github Repo</a></p> <h2> Still improving </h2> <p>This is an early release, and I’m actively improving it.</p> <p>Real feedback would help a lot, especially from people who have dealt with:</p> <ul> <li>gradual JS to TS migration</li> <li>CommonJS to ESM headaches</li> <li>existing Express or Node backends</li> <li>lint/test setup that tends to break during migration</li> </ul> <p>If you try it, I’d genuinely like to know what feels smooth and what feels annoying.</p> webdev javascript beginners typescript