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ECMA-426

Source map format specification

1st edition, December 2024

This Standard defines the source map format, used by different types of developer tools to improve the debugging experience of code compiled to JavaScript, WebAssembly, and CSS.

The source map format has the following goals:

  • Support souce-level debugging allowing bidirectional mapping
  • Support server-side stack trace deobfuscation

Kindly note that the normative copy is the HTML version; the PDF version has been produced to generate a printable document.

This edition has been prepared under the Ecma RF patent policy.

The latest drafts are available at: https://tc39.es/ecma426/.

Download this standardView in HTML

Classification

CategorySoftware engineering and interfaces

SubcategoryECMAScript®

Technical CommitteeTC39