---
title: "Node.js"
url: https://docs.catalyst.zoho.com/en/tools/tunneling/implementation/ide-config/nodejs/
description: "Catalyst Tunneling allows you to debug Non-HTTPS and Integration functions by routing function calls to your local system using a rever-proxy provider's tunneling URL."
last_updated: 2026-08-17T12:16:04Z
service: All Services
type: general
---

# Configure IDE to Debug Node.js Functions

For the purposes of this help documentation we are going to illustrate how to configure debugging preferences of Node.js non-HTTPS and Integration functions in Visual Studio Code.

> **Note:** This step is only applicable if you wish to **debug your tunneled functions** and if you have used the following CLI command:

```sh
catalyst functions:shell --tunnel tunnel-port-number --debug port-number
```

If you wish only to tunnel your functions and you have used the following CLI command then no IDE configurations is required.

```sh
catalyst functions:shell --tunnel tunnel-port-number
```

This command will **only tunnel your functions** and publish the logs of the functions in the Catalyst CLI.

Configure your VS Code IDE's debugger in the following manner:

1. Ensure you have all the functions you need to debug in the local machine, and open the concerned project in VS Code.
![catalyst_tunneling_debug_vscode_node_openproject](https://catalyst-docs-development.zohostratus.in/images/catalyst-extension/tunneling/catalyst_tunneling_debug_vscode_node_openproject.webp)

2. Click the **Run/Debug** button present in the menu-bar and create a `launch.json` file, by clicking the "**create a launch.json file**" option.
![catalyst_tunneling_vscode_debug_create_json_high](https://catalyst-docs-development.zohostratus.in/images/catalyst-extension/tunneling/catalyst_tunneling_vscode_debug_create_json_high.webp)

This is how the launch.json file appears before you begin configurations.
![catalyst_tunneling_vscode_debug_create_json_high](https://catalyst-docs-development.zohostratus.in/images/catalyst-extension/tunneling/catalyst_tunneling_vscode_debug_create_json_high.webp)

3. Copy the JSON snippet below and paste it as value in the "**configurations**" JSON key.

**launch.json**

```json
"configurations": [{
			"name": "cron_fun",  // name can be any name but having the same function name will be helpful while debugging
            		"type": "node",
            		"request": "attach",
            		"address": "localhost",
          		  "port": 9001, // The debug port number you specified in the catalyst functions:shell --tunnel 8001 --debug 9001. The port number can be any number which is not being used by any other processes
            		"localRoot": "/Users/jack/tun_cli/functions/cron_fun" //Exact path where the function folder is present
    }],

```

4. Save this file and apply the breakpoints in your required lines of code and proceed to the [next step](https://docs.catalyst.zoho.com/en/tools/tunneling/implementation/debug-tunneled-func/nodejs/).
![catalyst_tunneling_debug_vscode_node_brkpts_set](https://catalyst-docs-development.zohostratus.in/images/catalyst-extension/tunneling/catalyst_tunneling_debug_vscode_node_brkpts_set.webp)