Registry / devops / jsmin-sourcemap

jsmin-sourcemap

library0.16.0jsnpmunverified

A command-line tool and library that applies JSMin minification while generating source maps. Version 0.16.0 is the latest release; the project has seen sporadic updates with no recent activity. It differentiates from plain JSMin by producing source maps for debugging minified JavaScript, useful in build pipelines. The library offers a Node.js API and CLI interface with basic minification and source map generation.

devops

npm install jsmin-sourcemap

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · JSMIN-SOURCEMAP

jsmin-sourcemap

devopsjavascriptv0.16.0

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

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

jsminSourcemap

✓ import { jsminSourcemap } from 'jsmin-sourcemap';

✗ const jsminSourcemap = require('jsmin-sourcemap');

ESM import preferred; CJS require works but may be deprecated.

jsminSourcemap

✓ const jsminSourcemap = require('jsmin-sourcemap');

CommonJS import for Node.js, still supported.

Shows how to minify a JavaScript file and generate a source map using the jsminSourcemap function.

import { jsminSourcemap } from 'jsmin-sourcemap'; import fs from 'fs'; const code = fs.readFileSync('input.js', 'utf8'); const result = jsminSourcemap(code, { sourceFile: 'input.js', destFile: 'output.min.js' }); console.log(result.code); // Minified code console.log(result.map); // Source map (string) fs.writeFileSync('output.min.js', result.code); fs.writeFileSync('output.min.js.map', result.map);

Debug

Known issues

gotchaThe jsminSourcemap function expects a string of code; if you pass an object or buffer, it may fail silently.

fix

Ensure the first argument is a string (use .toString() or .utf8Slice() if needed).

affects: >=0.1.0

gotchaSource map generation requires the 'sourceFile' option; if omitted, the source map may be incorrect.

fix

Always provide the 'sourceFile' option (and optionally 'destFile') to get correct source mappings.

affects: >=0.1.0

breakingStarting from version 0.12.0, the output source map format changed from inline base64 to separate file reference. If you relied on inline maps, upgrade with caution.

fix

If you need inline maps, set the 'inlineMap' option to true in the options object.

affects: >=0.12.0

deprecatedThe CLI tool has been deprecated since version 0.15.0; use the API programmatically instead.

fix

Migrate to using the JavaScript API (jsminSourcemap function) and maintain your own CLI wrapper if needed.

affects: >=0.15.0

gotchaThe package does not support TypeScript type definitions; you must write your own or ignore type errors.

fix

Add a declaration file (e.g., declare module 'jsmin-sourcemap') or use @ts-ignore.

affects: >=0.1.0

Errors

Common errors & fixes

TypeError: Cannot read property 'code' of undefined

The jsminSourcemap function returned undefined, likely due to invalid input (non-string code).

fix

Ensure the first argument is a valid JavaScript string and not empty.

Error: sourceFile must be a non-empty string

The 'sourceFile' option is missing or empty.

fix

Pass a sourceFile property in the options object.

Error: destFile must be a string if provided

The 'destFile' option is not a string (e.g., number or object).

fix

Ensure destFile is a string (filename) or omit it.

Upgrade

Version history

0.16.0latest on npm

Audit

Dependencies

jsminrequiredCore minification engine; jsmin-sourcemap wraps jsmin for minification.

source-maprequiredFor generating and manipulating source maps.

Agent activity

7 hits · last 30 days

node

Resources

githubgit://github.com/twolfson/node-jsmin-sourcemap ↗

packagejsmin-sourcemap ↗

homepagehttps://github.com/twolfson/node-jsmin-sourcemap ↗