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Minified JS bundle with an inline base64 source map

The same bundle with its v3 map embedded as a base64 data: URI in the sourceMappingURL comment - the single-file form dev builds emit. For testing that a tool decodes an inline map instead of trying to fetch it as a relative path.

Web assets Code parsing Syntax highlighting

Preview — first 3 linesjs

(()=>{function e(n){return`Hello, ${n}!`}console.log(e("world"))})();
//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJmaWxlIjoiYnVuZGxlLmlubGluZS1tYXAubWluLmpzIiwic291cmNlUm9vdCI6IiIsInNvdXJjZXMiOlsic3JjL2dyZWV0LmpzIiwic3JjL2luZGV4LmpzIl0sInNvdXJjZXNDb250ZW50IjpbImV4cG9ydCBmdW5jdGlvbiBncmVldChuYW1lKSB7XG4gIHJldHVybiBgSGVsbG8sICR7bmFtZX0hYDtcbn1cbiIsImltcG9ydCB7IGdyZWV0IH0gZnJvbSBcIi4vZ3JlZXQuanNcIjtcbmNvbnNvbGUubG9nKGdyZWV0KFwid29ybGRcIikpO1xuIl0sIm5hbWVzIjpbImdyZWV0IiwibmFtZSJdLCJtYXBwaW5ncyI6Ik1BQU9BLFdBQWVDLEdBQ3BCLHFCQ0FGLFlBQVlEIn0=

Specifications

Seed: 70400
Site: example.com (fictional)
Source Mapping URL: data: URI
Encoding: base64
Map Bytes: 444
Original Sources: 2

Testing contract

Expected to pass

Scenario: Open a bundle whose sourceMappingURL is a data: URI.
Expected result: The base64 payload decodes to the same v3 map as the external fixture, no HTTP request is made, and positions resolve identically.

What is a .js file?

JavaScript (.js) is a plain-text source file for the JavaScript language — the scripting language of the web, also used server-side via Node.js. It is dynamically typed and event-driven, with first-class functions, prototypes, and (in modern syntax) modules, classes, and async/await.

How to use this file

Use an example .js file to test syntax highlighters, linters (ESLint), formatters (Prettier), bundlers, and JavaScript parsers, or as editor and diff-viewer fixtures.

How to use this file for testing

“Minified JS bundle with an inline base64 source map” is a deterministic Novus Examples fixture for Web assets, Code parsing, Syntax highlighting. Favicons, web app manifests, service workers, robots and sitemap files, Open Graph images, and .well-known resources — for testing web tooling, crawlers, PWA installers, and asset pipelines.

Documented properties for this file: seed 70400 · base64. Compare results against paired or grouped companions on this page when present (clean↔damaged, searchable↔scanned, or format twins) so scores stay reproducible across runs.

Download the file once, keep the path stable in CI or local scripts, and treat the spec table as the contract: dimensions, seeds, field lists, and roles are intentional. Corrupt or invalid samples are labelled as such — expect parsers to fail loudly rather than silently accept them.

Web-platform fixtures are standards-compliant samples against fictional example.com data. Test crawlers, PWA installers and manifest validators, favicon/icon pipelines, service-worker registration, or .well-known parsers against the documented structure.