So you need a JavaScript Installation Guide Template
Most people write these by copying whatever Stack Overflow told them five years ago. The result is a document that claims "just run npm install" and then breaks on the first project that uses TypeScript or a bundler that isn't Webpack 4. I've been fixing broken install docs for years, so I'm just going to lay out what I actually use. Here's the structure. It's not complicated, but the details are where people screw up. System requirements section. State exactly what Node version you need. Not "Node.js recommended." Say "Node 18.17+ or Node 20.0+." If your project uses optional dependencies like sharp or bufferutil that compile native code, list the build tools required too. I had a client last year who couldn't figure out why their team's CI pipeline kept failing on ARM64 machines. Turned out the package.json had a devDependency on a library that didn't ship prebuilt binaries for that architecture. The error message was completely opaque - something about `node-gyp rebuild failed` with no context about which package. Took three hours of digging. I learned to always check for native dependencies and document the workaround explicitly.
Prerequisites. Node, npm or yarn or pnpm - pick one and state which. Don't say "use your preferred package manager." That's not helpful. Tell me which one this project uses and why. If it uses pnpm because of workspace hoisting, say that. If it uses npm because the team doesn't want to think about it, say that too. Installation commands. Single line. One command. The install command should work from a clean directory with nothing preinstalled. If it requires running `npm init` first, say so in the step before. I once documented a setup process that silently skipped adding the dependency to package.json because I'd forgotten to mention the `--save` flag. The package installed to node_modules but wasn't listed in the lockfile. Three devs went a full sprint before anyone noticed. Verification step. This is the part everyone skips. After installation, the reader should run one command that proves the thing is actually installed and working. Usually that's something like `node -e "require('package-name'); console.log('ok')"` or a simple import test. If the package has a CLI, run the CLI with no arguments. The fact that it errors helpfully is actually good verification at that point.
Common issues section. List the top three problems that will happen. For a JavaScript project this is usually: wrong Node version, permission errors from running npm with sudo, and firewall/network issues blocking package downloads. The permission thing is still a thing people hit in 2026. Use nvm or fnm if you have control issues. Don't use sudo. Actually, just don't mention sudo at all. If someone asks about it, tell them to look it up elsewhere. There's a tradeoff here with these templates. The more detailed you make them, the more outdated they become when the project updates its dependencies. I've seen guides get to the point where every single step requires a footnote. That's worse than being too brief. Aim for enough detail that a competent developer can follow it on the first try. They're not beginners. They're tired devs who want to install something and move on. If you're building this for your own project, keep it under 500 words. Anything longer and nobody reads it. Put the install command at the top, above the fold, before any explanation. The explanation comes after. Nobody cares about the history of the package before they know how to install it.
Get the Full Details
You can download a bare-bones version of this template as a markdown file from the project repository if you want to start from something that's already structured correctly. Or just copy what I wrote above. It's not secret.
What to do after installation
Most templates stop at installation. That's incomplete. Add a section about what to do next - run the dev server, build the project, run tests. Give them the next command so they don't have to hunt for it in the repo. The template works best when it's treated as a living document, not something you write once and forget. Every time someone opens a GitHub issue about installation, that's a chance to improve it. If two people ask the same question within a month, add the answer to the guide. That's how you actually keep these things accurate.
