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# Immaculata.dev

Node.js DX primitives

npm i immaculata

# Developer experience (DX) primitives

# Module hot-reloading in Node.js

import { FileTree, hooks } from 'immaculata'
import { registerHooks } from 'module'

// keep an in-memory version of "./src" in memory
const tree = new FileTree('src', import.meta.url)

// invalidate modules under "src" when they change
registerHooks(hooks.useTree(tree))

// keep it up to date
tree.watch().on('filesUpdated', doStuff)
doStuff()

// importing modules under 'src' now re-executes them
async function doStuff() {
  const { stuff } = await import("src/dostuff.js")
  // "stuff" is never stale
}

Learn more about enabling native HMR

# Native JSX in Node.js

import { hooks } from 'immaculata'
import { registerHooks } from 'module'

// compile jsx using something like swc or tsc
registerHooks(hooks.compileJsx(compileJsxSomehow))

// remap "react-jsx/runtime" to any import you want (optional)
registerHooks(hooks.mapImport('react/jsx-runtime', 'immaculata/jsx-strings.js'))

// you can now import tsx files!
const { template } = await import('./site/template.tsx')

Learn more about enabling native JSX

# Check out some recipes

# License

MIT License

Copyright (c) 2025 @thesoftwarephilosopher

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

# Special thanks

This project was made possible by Jesus, Mary, and Joseph.