Javascript has become the most popular programming language, start from browser and run on backend side.
The year 2026 have seen an increasing usage of JavaScript usage across various runtimes. I will explain each option for production-ready based on my experiences. I’ve been create some projects using different kind of javascript tech stack, there is several thing you should consider to start new javasript project.
Scratch vs. Framework?
To build from scratch it’s mean you collect everything and choose everything by hand. It gave flexibility and freedom, nothing stop you from using a library, method or style programming. But, it require a lot of research, reading, and test. Template are common start if you don’t want too much time building from scratch.
On the other hand, Framework is a template ready-to-use, production-ready, and full of basic feature. You will focus on the problem and solution, less time research, beginner friendly and highly feedback-loop. Beside the conventional of framework, the security also caried over. Less control over framework makes harder to customize edge-case, and less aware to security aspect. You have to frequently update the framework to keep it secure.
Below are a few examples of these method along with their respective libraries.
| Method | Backend | Frontend | Fullstack |
| Scratch | Expressjs, fastify, hono | React.js, Vue.js, Angular | (Combination) |
| Framework | Nest.js | Tanstack | Nextjs, Nuxt |
Deployment: Self-Hosted vs. serverless?
Self-Hosted gave flexibility but require technical Operating System to operate, manage and make a secure environment.
On the other hand, serverless offers low-cost maintainability and pricing. But, careful with spike price when your website have a lot visitor. For example, serverless providers such as vercel, Cloudflare workers, Fastly Compute, Google Cloud Run, Supabase Function.
Serverless takes different approach to handle request by leveraging Web Standards Fetch. In contrast, node.js uses HTTP Callback which is doesn’t support by many serverless.
Framework backend like Nest.js utilizing express.js or Fastify. So, basically it follow the same support. Modern library backend like hono or nitro are using adapter server to run different environment for Node.js or serverless.
AI Support?
AI support refers to how easily it can be generated by AI. Mature libraries (5+ years old) is more likely accurately generated by AI. The APIs are barely change and stable. Modern libraries require host or build by yourself the LLM.txt file in their sites to consume by AI.
If you want fully support AI from backend to frontend, you should look into thin layer structure code. Next.js is the most usage of code generated by AI, beside the simplicity and easy to use, it have all needs such as API Integration, Database, Authentication, and Beautiful UI Support.
Runtime Javascript and Typescript
There is 3 runtimes popular for javascript, Node.js, Deno and Bun. Node.js is the most popular and stable runtime javascript, it have big community. Bun and Deno is new and modern, they are focusing on modern style programming like Typescript, Serverless, and Web Standards. Bulit-in tools, such as linting and unit-testing, make it more convenient to use.
Bun is great to create CLI tools and serverless because instant startup compare to node.js. On the other hand, Deno writen on Rust language to make safety and efficient memory management. Modern runtime is good for modern library, you will find less documentation, community and support library.
| Feature | Node.js | Bun | Deno |
| Javascript Runtime | ✅ | ✅ | ✅ |
| Typescript Runtime | ⚠️Require Type Stripping | ✅ | ✅ |
| Bundling | ⚠️Require Third-party library | ✅ | ⚠️Experimental |
Bundling
If you write javascript code for browser, you need bundling all code, asset and css into single file (bundled). Also if you choose to build from scratch node.js and typescript, you should bundle the script and resolve the packages into single file javascript, either run on browser or node.js. There is several library bundlers you can use:
Why is bundling needed when Node.js can just run the code directly? the answer is mixing ECMAScript and CommonJS. Node.js can’t run different type of code, you should choose one of them. Bundling resolves different packages and standards into single file or splits them to run in Node.js.
The most modern bundlers is Vite backend by rolldown—claimed faster than esbuild, rollup and webpack— but with similar API.
Modern runtime, bun and deno doesn’t require bundling to run javascript in server because it run the code directly, but they provide feature bundling for example bun bundler and deno bundling.
Maybe you don’t need this, almost all modern framework javascript already setup bundling for you.
Conclusion
Building highly customizable, flexible and scalable Javascript project in 2026 offers more options, including runtime alternative, modern library, Typescript-by-default, and modern deployment. I recommend you to use mature library for better community, support and security. Hopefully this guide