Add the library Name, Description and select the Language to write the library function. You can also add multiple functions in a single library.
Click Run Test to ensure the library code has the correct syntax.
To use the libraries in your existing transformations, note the Import Library Name option in the RudderStack dashboard:
RudderStack converts the library name into camel case without spaces; this becomes your library handle which you can use across multiple transformations. For example, if your library name is Sample Transformation Library, then the library handle would be sampleTransformationLibrary.
You can then use the library in a transformation with a simple import statement. Refer to the below use case for more information.
Suppose you want to filter the events that don’t contain an email address with the RudderStack domain. To do so, you can import a rudderEmail function from the transformation library isRudderEmail.
The rudderEmail function containing the filtering logic is shown below:
You cannot delete a library that is referenced or imported in a transformation.
To delete a library, go to Enhance > Transformations > Libraries and click the Delete button next to the library that you want to delete.
By default, RudderStack provides three predefined libraries which you can directly import into your transformations. Refer to the GitHub codebase for the code and implementation-specific details for these libraries.
Use the following structure to import the Rudderstack libraries:
A sample import statement is shown below:
This library lets you encrypt and decrypt PII, including those stored in cookies.
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