JavaScript connector – The freedom to transform your way

JavaScript Connector
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As users we expect flexibility, customizability, and extensibility in standard software to meet our needs. 

Whereas customizability measures the degree and ease with which we can modify existing features, extensibility measures the degree and ease with which we can add new ones.

Both customizability and extensibility express the openness of a platform and the freedom it provides to fit our needs – now and in the future. This freedom gives us confidence and comfort that we will not be locked into a rigidly inflexible system.

Creating freedom with extensibility:

One of the core guiding principles for the Workato platform has been to make it more open and extensible. 

  • Connector SDK enables you to extend the library of connectors for their ecosystem of apps.
  • Platform APIs give you the ability to seamlessly integrate Workato into their existing provisioning, lifecycle management and CI/CD processes. 
  •  RecipeOps APIs  can be used to conveniently set up Job as a Service to work with 3rd party orchestration tools.
  • Job history and audit log streaming enables you to extend the monitoring & auditing to a centralized SIEM application like Splunk or others.

What does JavaScript have to do with extensibility?

Although Workato provides a rich set of formulas and in-memory databases for SQL transformations, occasionally both means to transform data are either inadequate or inefficient.

This requires recipe builders to step outside of the tools available in Workato and bring in their own language/tool of choice, such as Ruby, AWS Lambda, JavaScript, Python or others to create custom transformations.

The ability to create custom transformations using a scripting language gives developers the freedom to extend the platform to fit their needs.

Until now, Workato supported builders creating custom transformations using AWS Lambda and Ruby.

With the new JavaScript connector, recipe builders can now use Javascript to build powerful custom transformations.

The Workato JavaScript connector runs on Node.js version 14. All JavaScript libraries included in the Node.js version 14 are available in the JavaScript action. Additionally, the following libraries are included:

Let’s look at some examples:

Cleaning and validating data to improve quality 

Several business processes across marketing, finance, customer support, sales, and HR require reliable contact information of entities like leads, customers, partners, employees, and others.  Typically data collection points like landing pages, lead generation forms, job submissions, and partner registration pages are designed for a frictionless experience.  This often results in the values for emails being invalid, lack of standardized formats for phone numbers, name, zip codes, and other structural inconsistencies.

You can create an action using the JavaScript connector with custom rules for improving data quality by checking for:

  • Validity: The degree to which data conforms to business rules and constraints, e.g. email cannot use a personal domain like
  • Completeness: ensuring all required data is known, identifying and fixing missing values, e.g. business phone number is always present
  • Consistency: Ensuring the data is represented the exact same way across datasets, e.g. country code or currency code uses the ISO values
  • Uniformity: Converting values into standardized formats, e.g. ensuring first and last name is always capitalized in title case
  • Correctness: Ensuring the accuracy of the data, e.g. phone numbers are 10 digits

The below example recipe shows a data pipeline that extracts contact information from Salesforce, validates the contact information vis-a-vis email, phone, zip-code to load good quality contacts. All valid contact data is loaded into a table in Snowflake and contacts with poor data quality are reported for review in Slack.

Custom data validation rules

Custom data validation rules

The JavaScript action invokes the below code snippet to parse the contact information from Salesforce, and apply the various validation checks.

JavaScript Code

JavaScript Transformation

Typically,  such data validations and cleansing are required across multiple processes e.g. lead cleansing, employee onboarding, order fulfillment etc. You can easily make a reusable component by creating a callable recipe with a similar JavaScript action for data validations.

You can also look into creating an API endpoint to make this cleansing and validation, and make it available as a service to internal teams like Marketing, RevOps, Sales, Finance, HR, Support or others.

Converting Excel files into CSVs

If death and taxes are the two constants in life, spreadsheets is a constant for businesses. Everyone has used spreadsheets regardless of job function, role, or title. They are a powerful tool to organize, visualize, and manipulate data. Spreadsheets are used for tracking projects, campaign plans, campaign performance data, financial reports, forecasting models, deal details, lead data, order information and more.

Not surprisingly many business processes need access to the valuable and critical data stored in these documents. However, it is difficult to extract data from spreadsheets in their native form, especially Microsoft Excel documents. Add to that the complexity of multiple sheets, calculated fields using formulas, filters, and more, and the challenge only grows.

Consequently, accessing data from the Microsoft Excel documents requires manual conversion into a more friendly and accessible file format such as Comma Separated Values (CSV) or Tab Separated Values (TSV).

Below is an example automation using JavaScript that can be used to covert Microsoft Excel documents into CSVs.

Converting .xlsx to CSV

Converting .xlsx to CSV

These are a couple of examples of what you could accomplish with JavaScript actions.

Got any other interesting ideas to share? Send your examples to


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