Suppress Node.js warnings in CLI

// suppress-node-warnings.cjs

// inspired by 
// https://github.com/nodejs/node/issues/30810#issuecomment-1383184769
const { emit: originalEmit } = process;

function suppresser(event, error) {
  return event === 'warning' && error.name === 'ExperimentalWarning'
    ? false
    : originalEmit.apply(process, arguments);
}

process.emit = suppresser;

node --require ./suppress-node-warnings.cjs <whatever>

I'm using "type": "module" in package.json so I needed to use .cjs.

I'm also using ts-node so to run TypeScript files, I have the following script:

	"scripts": {
	  "run-ts": "node --loader ts-node/esm --require ./scripts/suppress-node-warnings.cjs"
	}

now I can run ts file with npm run-ts filename.ts.

You can also use NODE_NO_WARNINGS=1 to suppress all warnings. E.g.,

NODE_NO_WARNINGS=1 node <...>

o-az/suppress-node-warnings.md