CDN for Retool Embed Javascript SDK

💬 App Building
1

Is there a way to get the Javascript SDK through a CDN? I can't install it through NPM so I need another way to get it. I need to use postMessage from an embed to send some data to Retool through an embed and having some issues

2

Hi @Daniel_Ramalhosa1, Welcome to the Retool Community!

1. Load the Retool SDK

Since NPM installation isn’t an option, you can use the Retool SDK via CDN:

<script src="https://cdn.retool.com/embed.js"></script>

This makes window.Retool available in your JavaScript for communication with Retool.

2. Sending Data to Retool from the Embed

Use window.Retool.sendData() to send data from your embedded page to Retool:

window.Retool.sendData({
  message: "Hello from Embed!",
  userId: 12345
});

In Retool, capture this data using an Event Handler.

3. Receiving Data from Retool in the Embed

To receive updates from Retool in your embed, subscribe to changes:

window.Retool.subscribe((model) => {
  console.log("Data received from Retool:", model);
});

This triggers whenever the embed model updates.

4. Using postMessage for Custom Communication

If embedding Retool inside another app, postMessage allows communication between the iframe and its parent:

window.parent.postMessage({ type: "customEvent", data: { key: "value" } }, "*");

For more details, check the documentation:
:link: Embed Apps in Retool

Feel free to ask if you need more help—we’re here to assist! :rocket:

1 Like
3

Sorry I think I worded my post wrong. I have a page and in it I have an iframe of my retool page. How do I send data from my page to the retool portal that is embedded?