See scripts/README.html

The following are instructions for making changes to the JS code. You don't need to do any of this stuff if you just want to run the script.

Use yarn or npm.

Install dependencies.

yarn install

Compile into Keyframes After Effects Scripts.

yarn compile

File watcher, compile every time a file changes.

yarn compile-watch

Run tests.

yarn test

File watcher, run the tests every time a file changes.

yarn test-watch

Converts After Effects Comp JSON into Keyframes Animation descriptor JSON.

Usage example: Convert an After Effects Comp JSON file into a Keyframes Animation descriptor JSON file.

var AECompToKeyframesAnimation = require('AECompToKeyframesAnimation');
fs.writeFileSync(exportPath, JSON.stringify(AECompToKeyframesAnimation(fs.readFileSync(importPath))));

Usually this code is used by the Keyframes After Effects Scripts/FB Keyframes Exporter.jsx run by Adobe After Effects. /scripts/lib/keyframes/AECompToKeyframesAnimation.js is a compiled version of this code. Compile using the instructions in the setup section above.