As an example, let’s assume we want to experiment with the standard Node.js function
util.format(). We create the file
mysnippet.mjs, with the following content:
import * as util from 'node:util'; console.log(util.format('Hello %s!', 'world'));
How can we run
mysnippet.mjs while we are working on it?
We first install the npm package nodemon:
npm install -g nodemon
Then we can use it to continuously run
Whenever we save
mysnippet.mjs, nodemon runs it again. That means that we can edit that file in an editor and see the results of our changes whenever we save it.
You can even try out nodemon without installing it, via the Node.js tool npx:
npx nodemon mysnippet.mjs
See §7.11.4 “Use case for URLs: detecting if the current module is “main” (the app entry point)”.
See §7.11.3 “Use case for URLs: accessing files relative to the current module”.