This directory contains externs definitions for improving the precision of some of the JavaScript analyses.

Externs are organized into five categories, corresponding to the subdirectories of this directory:

• es: Externs definitions for the ECMAScript language standard; imported from the externs directory of the Google Closure Compiler source tree (https://github.com/google/closure-compiler).

• web: Externs definitions for various web standards and browser-specific extensions; imported from the same source.

• vm: Externs definitions for specific JavaScript VMs; also imported from the same source.

• nodejs: Externs definitions for common Node.js modules; generated from the TypeScript type definitions for Node.js provided by DefinitelyTyped, revision 28d94377786d6da325b76614aa4c1849dc05703e, with a few custom extensions.

• lib: Externs definitions for popular JavaScript libraries.

See the individual files for copyright and licensing information.