name: jsvu description: "How to use jsvu for cross-engine testing."

JSVU (JavaScript engine Version Updater)

Use jsvu to install and test across multiple JavaScript engines (e.g., v8, spidermonkey, javascriptcore, chakra).

Installation and Setup

For non-interactive installation and updating of specific engines on Linux, run:

npx jsvu --os=linux64 --engines=v8,spidermonkey,javascriptcore

You can customize the --engines flag with the engines you wish to test (e.g., v8,v8-debug,spidermonkey,javascriptcore,graaljs).

Running Engines

Once installed, the engines are available in ~/.jsvu/bin/. You can run them directly:

~/.jsvu/bin/v8 my_test.js
~/.jsvu/bin/spidermonkey my_test.js
~/.jsvu/bin/javascriptcore my_test.js

This allows you to easily cross-reference behaviors and bugs against other major JS engines.