getSource.js 605 B

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  1. /*
  2. MIT License http://www.opensource.org/licenses/mit-license.php
  3. Author Tobias Koppers @sokra
  4. */
  5. "use strict";
  6. /** @typedef {import("../Source").RawSourceMap} RawSourceMap */
  7. /**
  8. * @param {RawSourceMap} sourceMap source map
  9. * @param {number} index index
  10. * @returns {string | null} name
  11. */
  12. const getSource = (sourceMap, index) => {
  13. if (index < 0) return null;
  14. const { sourceRoot, sources } = sourceMap;
  15. const source = sources[index];
  16. if (!sourceRoot) return source;
  17. if (sourceRoot.endsWith("/")) return sourceRoot + source;
  18. return `${sourceRoot}/${source}`;
  19. };
  20. module.exports = getSource;