JavaScript SDK
Contact us about the availability of the JavaScript SDK.
JavaScript instrumentation
The Antithesis platform can automatically instrument JavaScript code by performing a source transformation after you’ve sent it to us. No changes to your source code or build system are required. Our instrumentor assumes by default that you are using NodeJS as your runtime – contact us if you’d like to use a different runtime. We do not support instrumenting JavaScript code that runs in a browser.
NodeJS
Place directories, files, or symlinks to the code you want instrumented or cataloged in the directory /opt/antithesis/catalog/
within your container image. Antithesis will follow all symlinks while resolving the path to the cataloging directory.
However, it will follow only one symlink deep into each item placed within /opt/antithesis/catalog/
. That is, you should not symlink to a symlink.
Example cataloging directory:
> ln -s /usr/share/my_app /opt/antithesis/catalog
> ls -lAh /opt/antithesis/catalog
lrwxrwxrwx 1 me users 4 Apr 8 17:32 /opt/antithesis/catalog -> /usr/share/my_app
> ls -lAh /opt/antithesis/catalog/
-rwxr-xr-x 1 me users 20K Apr 8 17:33 dotnet_file.dll
lrwxrwxrwx 1 me users 27 Apr 8 17:52 more_files -> /opt/my_project/java_files
-rwxr-xr-x 1 me users 10K Apr 8 17:33 python_script.py
> ls -lA /opt/antithesis/catalog/more_files/
-rw-r--r-- 1 me users 16K Apr 8 17:51 main.jar
lrwxrwxrwx 1 me users 16K Apr 8 17:51 my_other.jar -> /some/other/place.jar
Based on the example above, the following files would be instrumented:
dotnet_file.dll
python_script.py
main.jar
Ignored files:
my_other.jar
- this will be ignored as we already encountered one symlink when traversing down fromopt/antithesis/catalog/more_files
.
When instrumenting Javascript, the instrumentor will search for directories containing node_modules
and recursively instrument all of the code within said directories; however, it will by default exclude everything in node_modules
and some standard configuration files that happen to be implemented as JavaScript (for instance eslint.config.js
). It follows that vendored dependencies will be instrumented by default.
The instrumentor will, by default, act upon every language it supports in the cataloging directory: (Java , Python, JavaScript, .NET), not just JavaScript.
For dependency management, Antithesis supports require
by default, but can be configured to support import
– please speak to your professional services consultant.
JS-target languages
Antithesis can instrument projects in JavaScript-target languages such as TypeScript if you provide us with transpiled JavaScript code. Transpilation must happen before you send us the code (as part of your build process), rather than at service startup.
Symbolization
Antithesis will automatically gather the symbol information from your code. You do not need to separately provide us with symbol files.
Help
Contact us if you need help with this.