Registry / serialization / json2mq

json2mq

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library0.2.0jsnpmunverified

json2mq is a JavaScript utility that translates plain JavaScript objects or JSON structures into valid CSS media query strings. Its current and only stable version is 0.2.0, which was published over eleven years ago, signifying that the package is no longer actively maintained or developed. The library automatically appends 'px' to numeric dimension values, handles various media types (e.g., 'screen', 'handheld'), and supports negations. A key differentiator is its straightforward, declarative input format for generating potentially complex CSS media query syntax, including support for multiple queries via an array of objects. Due to its age, it predates modern JavaScript module systems and TypeScript integration.

serialization
npm install json2mq
github ↗package ↗
INSTALL
IMPORT
SIG · JSON2MQ
J
json2mq
serializationjavascriptv0.2.0
Install
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Import
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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.

json2mq
✓ const json2mq = require('json2mq');
✗ import json2mq from 'json2mq';
This package is CommonJS-only and does not support ES module `import` syntax. It was last published over a decade ago.
json2mq
✓ const json2mq = require('json2mq'); json2mq({minWidth: 100});
✗ import { json2mq } from 'json2mq';
The default export is the function itself, and it is not a named export. It's only available via `require`.

Demonstrates how to import json2mq and generate various CSS media query strings from simple to complex JSON objects.

const json2mq = require('json2mq'); // Basic media query console.log(json2mq({ minWidth: 768 })); // Expected: '(min-width: 768px)' // Complex query with multiple features and units console.log(json2mq({ screen: true, minWidth: 1024, maxWidth: '120em', orientation: 'landscape' })); // Expected: 'screen and (min-width: 1024px) and (max-width: 120em) and (orientation: landscape)' // Multiple distinct media queries in an array console.log(json2mq([ { screen: true, minWidth: 100 }, { handheld: true, orientation: 'landscape' } ])); // Expected: 'screen and (min-width: 100px), handheld and (orientation: landscape)'
Debug
Known issues
breakingThis package is abandoned. The latest version (0.2.0) was published 11 years ago and there have been no updates or security patches since. Using it in modern applications may introduce compatibility issues or security vulnerabilities.
fix
Consider migrating to a more modern and actively maintained library, or implement the media query string generation logic manually.
affects: >=0.2.0
gotchaThe package is CommonJS-only (`require()`) and does not support ES Modules (`import`). This means it cannot be directly imported into modern Node.js or browser projects that use ESM without a compatibility layer or bundler configuration.
fix
For ESM projects, use `import json2mq from 'json2mq'` with a bundler (like Webpack or Rollup) configured to handle CJS modules, or use `module.createRequire` in Node.js for explicit CJS loading. Alternatively, find an ESM-native alternative.
affects: >=0.2.0
gotchaThere are no TypeScript type definitions available for this package, either bundled or on DefinitelyTyped. This will result in a poor developer experience for TypeScript users, requiring manual declaration files (`.d.ts`) or `@ts-ignore` directives.
fix
If TypeScript types are critical, consider creating a `json2mq.d.ts` file with `declare module 'json2mq' { function json2mq(obj: any): string; export = json2mq; }` or seeking an alternative package with native TypeScript support.
affects: >=0.2.0
Errors
Common errors & fixes
ReferenceError: require is not defined in ES module scope
Attempting to use `require()` in an ES module environment (e.g., a Node.js project with `"type": "module"` in package.json or a `.mjs` file).
fix
If within Node.js ESM, use `const createRequire = require('module').createRequire; const requireLocal = createRequire(import.meta.url); const json2mq = requireLocal('json2mq');`. For browser environments or bundled ESM, ensure your bundler is configured to handle CommonJS modules.
TypeError: (0, _json2mq.default) is not a function
Incorrectly attempting to import the default CommonJS export of `json2mq` as a named or default ES module import that does not align with how bundlers might transpile it, especially when `esModuleInterop` is not configured or the environment is pure ESM.
fix
If using a bundler (like Webpack, Rollup), ensure it's correctly configured to handle CommonJS modules and their default exports. If in Node.js ESM, use the `createRequire` approach. Otherwise, the package might not be compatible with your setup.
Upgrade
Version history
0.2.0latest on npm
Audit
Dependencies
string-convertrequiredUsed internally for string manipulations and camel case conversion.
Agent activity
2 hits · last 30 days
node
2
Resources
githubhttps://github.com/akiran/json2mq ↗
packagehttps://www.npmjs.com/package/json2mq ↗
json2mq — npm install json2mq · libregistry