Registry / testing / dev-null

dev-null

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library0.1.1jsnpmunverified

The `dev-null` package for Node.js provides a straightforward implementation of a `/dev/null` stream, consuming all piped input data without emitting any output. This utility is particularly useful in testing, debugging, or scenarios where stream data needs to be discarded to prevent side effects, such as when monitoring stream events rather than their payload. Currently at version 0.1.1, the package is exceptionally stable due to its singular, well-defined purpose, and is not expected to receive frequent updates or new features. Its key differentiator is its minimal API and focused functionality, making it a drop-in solution for stream nullification without introducing unnecessary overhead or complex configurations, serving as a direct parallel to the Unix `/dev/null` device for data streams.

testing
npm install dev-null
github ↗package ↗
INSTALL
IMPORT
SIG · DEV-NULL
D
dev-null
testingjavascriptv0.1.1
Install
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Import
—
Disk
—
Pass rate
0/ 6
Env Coverage0 / 6
glibc
18–22
musl
18–22
Install & Compatibility
Where this runs
tested against v? · npm install
Install × environment matrix
Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux
musl
node 18–226 runs
build_error
glibc
node 18–226 runs
build_error
Code
Verified usage

Verified import paths — ran on the pinned version, not inferred.

devnull
✓ const devnull = require('dev-null');
✗ import devnull from 'dev-null';
Primary CommonJS import. The package exports a function, not a stream instance directly.
devnull()
✓ someStream.pipe(devnull());
✗ someStream.pipe(devnull);
You must call `devnull()` to get a new writable stream instance to pipe into.
devnull (ESM)
✓ import devnull from 'dev-null'; // With transpiler or 'type: module'
✗ import { devnull } from 'dev-null';
While primarily CJS, modern Node.js ESM projects might use a default import with appropriate configuration (e.g., 'type: module' in package.json and import maps or bundlers).

Demonstrates piping a readable stream into dev-null to silence its output, contrasting it with a stream that outputs data.

const devnull = require('dev-null'); const { Readable } = require('stream'); // A simple readable stream that emits numbers class NumberReadable extends Readable { constructor(options) { super(options); this.current = 0; this.to = options.to || 5; } _read() { if (this.current > this.to) { this.push(null); // No more data return; } this.push(Buffer.from(String(this.current++))); } } console.log('--- Piping numbers to dev-null (no output expected) ---'); new NumberReadable({ to: 5 }) .pipe(devnull()) .on('data', (d) => { // This event should ideally not fire if dev-null works correctly console.log('Unexpected data received:', d.toString()); }) .on('end', () => { console.log('Stream ended after piping to dev-null. This message indicates successful consumption.'); }); console.log('\n--- Example without dev-null (output expected) ---'); new NumberReadable({ to: 2 }) .on('data', (d) => { console.log('Data without dev-null:', d.toString()); }) .on('end', () => { console.log('Stream ended without dev-null. This message follows expected data output.'); });
Debug
Known issues
gotchaThe `dev-null` package acts as a data sink. It consumes all piped data without emitting any output itself. Expecting data to pass through or be transformed by `dev-null()` is a misunderstanding of its purpose.
fix
Ensure you intend to discard data. If you need transformation or logging, use a `through` stream or a custom `Writable` stream.
affects: >=0.1.0
gotchaThis package is a CommonJS module. When using it in an ECMAScript Module (ESM) project, direct `import devnull from 'dev-null';` might require specific Node.js configuration (e.g., 'type: module' in package.json) or a bundler to resolve correctly, potentially leading to 'require() of ES module' errors in some setups.
fix
For CommonJS, use `const devnull = require('dev-null');`. For ESM, consider using `import devnull from 'dev-null';` with Node.js 'type: module' project setup or use `createRequire` if mixing CJS and ESM in a complex way.
affects: >=0.1.0
gotchaThe package is at version 0.1.1 and appears to be in a very stable, low-maintenance state. While functional, it's unlikely to receive new features, active bug fixes, or updates to modern Node.js stream APIs. This is generally not an issue given its simple utility, but users should be aware of the lack of active development.
fix
No fix needed if current functionality meets requirements. For highly active development or specific modern stream features, consider if a more actively maintained alternative exists, though few would be simpler for this task.
affects: >=0.1.0
Errors
Common errors & fixes
TypeError: devnull is not a function
Attempting to pipe directly to the imported `devnull` module (e.g., `someStream.pipe(devnull)`). The `dev-null` module exports a function that, when called, returns a new writable stream instance.
fix
Call the `devnull` function to create an instance of the null stream: `someStream.pipe(devnull());`
SyntaxError: Cannot use import statement outside a module
Trying to use `import devnull from 'dev-null';` in a Node.js environment configured for CommonJS (e.g., no `"type": "module"` in `package.json`).
fix
Change the import to a CommonJS `require` statement: `const devnull = require('dev-null');` or configure your project as an ESM module by adding `"type": "module"` to your `package.json`.
Upgrade
Version history
0.1.1latest on npm
Audit
Dependencies

No dependency data recorded yet.

Agent activity
8 hits · last 30 days
node
6
Resources
githubhttps://github.com/thlorenz/dev-null ↗
packagehttps://www.npmjs.com/package/dev-null ↗
dev-null — npm install dev-null · libregistry