esbuild-fastify-starter

.gitignore

node_modules
dist
yarn.lock

esbuild.js

#!/usr/bin/env node

let server,
	isDev = process.argv[2] === 'start',
	{ spawn } = require('child_process'),
	onRebuild = () => {
		if (isDev) {
			if (server) server.kill('SIGINT')
			server = spawn('node', ['dist/server.js'], { stdio: 'inherit' })
		}
	}

require('esbuild')
	.build({
		entryPoints: ['src/server.js'],
		outdir: 'dist',
		platform: 'node',
		bundle: true,
		sourcemap: true,
		watch: isDev && { onRebuild },
	})
	.finally(onRebuild)

package.json

{
	"private": true,
	"license": "UNLICENSED",
	"scripts": {
		"build": "node ./esbuild.js build",
		"start": "node ./esbuild.js start"
	},
	"dependencies": {
		"fastify": "^3.11.0"
	},
	"devDependencies": {
		"esbuild": "^0.8.42"
	}
}

server.js

const fastify = require('fastify')({ logger: true })

fastify.get('/hello', async (request, reply) => {
	return { hello: 'world' }
})

fastify.listen(3000)

src_server.js

const fastify = require('fastify')({ logger: true })

fastify.get('/hello', async (request, reply) => {
	return { hello: 'world' }
})

fastify.listen(3000)