jsvu
How to use jsvu for cross-engine testing.
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- nodejs/node
- Last source activity
- October 4, 2026 at 21:04
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- English
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Source instructions · Read-only preview- 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:
```bash
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:
```bash
~/.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.
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