Share via

CustomJS (Preview)

Execute custom JavaScript code in workflows with NPM module support. Generate PDFs, capture screenshots, transform data, parse files (CSV, XML, JSON, Excel), and integrate with any API. Secure execution environment. Get your API key at https://www.customjs.space

This connector is available in the following products and regions:

Service Class Regions
Copilot Studio Premium All Power Automate regions except the following:
     -   US Government (GCC)
     -   US Government (GCC High)
     -   China Cloud operated by 21Vianet
     -   US Department of Defense (DoD)
Logic Apps Standard All Logic Apps regions except the following:
     -   Azure Government regions
     -   Azure China regions
     -   US Department of Defense (DoD)
Power Apps Premium All Power Apps regions except the following:
     -   US Government (GCC)
     -   US Government (GCC High)
     -   China Cloud operated by 21Vianet
     -   US Department of Defense (DoD)
Power Automate Premium All Power Automate regions except the following:
     -   US Government (GCC)
     -   US Government (GCC High)
     -   China Cloud operated by 21Vianet
     -   US Department of Defense (DoD)
Contact
Name CustomJS Support
URL https://www.customjs.space
Email h@customjs.io
Connector Metadata
Publisher TechnologyCircle GmbH
Website https://www.customjs.space
Privacy policy https://www.customjs.space/terms-and-conditions/
Categories IT Operations;Productivity

CustomJS Connector

Publisher: TechnologyCircle GmbH

Execute custom JavaScript code with NPM module support in your workflows. Generate PDFs, transform data, parse files, and integrate with any API through secure JavaScript execution.

Prerequisites

To use this connector, you need:

Supported Operations

Execute JavaScript Code

Run custom JavaScript code with full NPM module support. Reference input data and return any result.

Use Cases:

  • Transform JSON data structures
  • Parse CSV, XML, or other file formats
  • Perform complex calculations
  • Validate data with custom rules
  • Integrate with external APIs

Parameters:

  • Input Value (Optional) - Data to process in your JavaScript code
  • JavaScript Code (Required) - Your custom JavaScript code

Examples:

Simple Code (No Input):

Code: return "Hello from CustomJS!"
Result: Hello from CustomJS!

Current Date with NPM Module:

Code: const moment = require('moment'); return moment().format('MMMM Do YYYY')
Result: December 16th 2025

With Input:

Input: John
Code: return "Hello " + input + "!"
Result: Hello John!

JSON Transform:

Input: {"name":"john","age":30}
Code: const data = JSON.parse(input); return JSON.stringify({name: data.name.toUpperCase(), age: data.age})
Result: {"name":"JOHN","age":30}

HTML to PDF

Convert HTML content to professional PDF documents. No coding required - just provide HTML and get a PDF.

Use Cases:

  • Generate invoices and receipts
  • Create reports from HTML templates
  • Generate certificates
  • Archive web pages as PDFs
  • Create printable documents

Parameters:

  • HTML Content (Required) - HTML markup to convert to PDF

Example:

<!DOCTYPE html>
<html>
<head>
<style>
body{font-family:Arial;padding:40px;}
h1{color:#2196F3;}
table{width:100%;border-collapse:collapse;margin:20px 0;}
th,td{border:1px solid #ddd;padding:10px;}
th{background:#2196F3;color:white;}
</style>
</head>
<body>
<h1>INVOICE</h1>
<p><strong>Invoice #:</strong> 2024-001</p>
<p><strong>Date:</strong> December 16, 2025</p>
<table>
<tr><th>Item</th><th>Qty</th><th>Price</th><th>Total</th></tr>
<tr><td>Service A</td><td>1</td><td>$100</td><td>$100</td></tr>
<tr><td>Service B</td><td>2</td><td>$50</td><td>$100</td></tr>
</table>
<p><strong>TOTAL: $200</strong></p>
</body>
</html>

Getting Started

  1. Sign up at https://www.customjs.space
  2. Generate your API key
  3. Add CustomJS connector to your flow
  4. Enter your API key when prompted
  5. Use Execute JavaScript Code or HTML to PDF actions

Support

Version History

v1.0.0.16 (Current - December 2025)

Updates:

  • Made Input parameter optional in Execute JavaScript Code action
  • Input field now appears first, followed by Code field
  • Improved user experience for code that doesn't require input

Features:

  • Execute JavaScript Code action with optional input
  • HTML to PDF action for simplified PDF generation
  • NPM module support
  • Secure execution environment

No Breaking Changes:

  • Fully backward compatible with v1.0.0.15
  • All existing flows continue working unchanged

v1.0.0.15 (December 2025)

New Features:

  • Added "HTML to PDF" action for simplified PDF generation
  • Clean Execute JavaScript Code action (input + code only)

Improvements:

  • Simplified user experience
  • Enhanced documentation with examples
  • Better error handling

v1.0.0.11 (November 2024)

Fixes:

  • Removed restricted keywords from description
  • Updated compliance requirements

v1.0.0.10 (November 2024)

Initial Release:

  • Execute JavaScript Code action
  • NPM module support
  • Secure execution environment

Privacy & Terms

Privacy Policy: https://www.customjs.space/terms-and-conditions/ Terms of Service: https://www.customjs.space/terms-and-conditions/

Categories

IT Operations, Productivity

Creating a connection

The connector supports the following authentication types:
Default Parameters for creating connection. All regions Not shareable

Default

Applicable: All regions

Parameters for creating connection.

This is not shareable connection. If the power app is shared with another user, another user will be prompted to create new connection explicitly.

Name Type Description Required
api_key securestring The api_key for this api True

Throttling Limits

Name Calls Renewal Period
API calls per connection 100 60 seconds

Actions

Execute JavaScript Code

Runs JavaScript code remotely via your CustomJS API key. The code can reference the input variable and use NPM modules.
HTML to PDF

Convert HTML content to a PDF document.

Execute JavaScript Code

Operation ID:
ExecuteJavaScript

Runs JavaScript code remotely via your CustomJS API key. The code can reference the input variable and use NPM modules.

Parameters

Name Key Required Type Description
Input Value
 input string

User-provided input string that can be referenced in your JavaScript code.
JavaScript Code
 code True string

JavaScript code to execute. Reference the input using the input variable.

Returns

The result of the JavaScript execution

response
string

HTML to PDF

Operation ID:
ConvertHTMLtoPDF

Convert HTML content to a PDF document.

Parameters

Name Key Required Type Description
HTML Content
 htmlContent True string

HTML content to convert to PDF

Returns

Binary PDF data

response
binary

Definitions

string

This is the basic data type 'string'.

binary

This is the basic data type 'binary'.