SNOHMR-2

🔥 Hot Module Replacement for Node.{js,mjs,ts} in ESM

• TypeScript support
• Watch latest changes
• Native ESModule support (compared to node-hmr)
• Boost your Node.TS development with just ONE line of for-await-of

Install

npm i -D snohmr
pnpm i -D snohmr

Examples

🔥 HMR in same file ♾

Running a module from an cli or somewhere else, and the file need to be debugging is ....

// /src/demo/self.ts
import snohmr from "../index";

export default async function main() {
  await new Promise(() => setTimeout(r, 1000)); // so heavy data loader
  const str = '["JSON"]';
  // SNOHMR magic incantation applied!
  for await (const module of snohmr(() => import("./self"))) {
    // const module is always latest version
    const { myparse } = module;
    // print latest myparse result immediately while you change this file,
    console.log({ parsedObject: myparse(str) });
    // = { parsedObject: ["JSON"] }
  }
}
export function myparse(input: string) {
  console.log({ input });
  return JSON.parse(input);
}
export function mystringify(input: any) {
  console.log({ input });
  return JSON.stringify(input);
}

🔥 HMR parse.ts from an loader 🔬

The file needs to be HMR debugging

// /parse.ts
export default function parse(data: string) {
  console.log(data);
  return JSON.parse(data);
}

And the data loader is calling parse.ts by snohmr.

// /cli.ts
import snohmr from "snohmr";

// load data
const data = await load(); // heavy function

// if this is your original way to call parse function from dynamic import
{
  const { default: parse } = await import("./parse");
  await parse(data).then(console.log);
}

// and then simpliy replace it with below then enjoy parse with SNOHMR
{
  for await (const { default: parse } of snohmr(() => import("./parse")))
    await parse(data).then(console.log).catch(console.error);
}

Reference

• This package is inspired from node-hmr - npm

About

License

GPLv3 - The GNU General Public License v3.0 - GNU Project - Free Software Foundation

Author

Author: snomiao [email protected] Website: snomiao.com

Sponsors

• None yet.

Claim your sponsorship by donating snomiao <Email: [email protected]>

Contribute

The main repo is in here, any issue and PR's welcome.