# Write a JavaScript Pipeline for Transformer

You can write Transformer modules in JavaScript. These modules are called JavaScript Pipelines. Usually you would implement a pipeline as a [Service blade](../deployment-framework/cdf-blade-types.md#service-blade). For a simple example of how to do this, see How can I... [Create a JavaScript-based Transformer Service blade](../deployment-framework/cdf-create-a-javascript-based-transformer-service-blade.md).