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codeql/change-notes/1.20/extractor-javascript.md
Max Schaefer b1033b079f JavaScript: Make configuration of parallel extraction consistent with parallel evaluation. 
Just like parallel evaluation, the number of extractor threads is now determined by the `LGTM_THREADS` environment variable, and defaults to one.
2019-03-05 10:06:32 +00:00

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condition: enterprise-only

Improvements to JavaScript analysis

NOTES

Please describe your changes in terms that are suitable for customers to read. These notes will have only minor tidying up before they are published as part of the release notes.

This file is written for lgtm users and should contain only notes about changes that affect lgtm enterprise users. Add any other customer-facing changes to the studio-java.md file.

General improvements

Changes to code extraction

  • Parallel extraction of JavaScript files (but not TypeScript files) on LGTM is now supported. The LGTM_THREADS environment variable can be set to indicate how many files should be extracted in parallel. If this variable is not set, parallel extraction is disabled.
  • The extractor now offers experimental support for E4X, a legacy language extension developed by Mozilla.
  • The extractor now supports additional Flow syntax.
  • The extractor now supports Nullish Coalescing expressions.
  • The extractor now supports TypeScript 3.2.
  • The TypeScript extractor now handles the control-flow of logical operators and destructuring assignments more accurately.