# How to use "call Postmessage" and "Whene receives message" with Web viewer?

**URL:** https://community.thunkable.com/t/how-to-use-call-postmessage-and-whene-receives-message-with-web-viewer/525168
**Category:** Questions about Thunkable X
**Created:** [March 20, 2020, 10:29am UTC](https://community.thunkable.com/t/how-to-use-call-postmessage-and-whene-receives-message-with-web-viewer/525168 "2020-03-20T10:29:29Z")
**Posts on this page:** 1
**Showing post:** 11

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### Author: ![jared](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/jared/32/138473_2.png) [@jared](https://community.thunkable.com/u/jared)
#### Post date: [May 10, 2020, 2:59pm UTC](https://community.thunkable.com/t/how-to-use-call-postmessage-and-whene-receives-message-with-web-viewer/525168/11 "2020-05-10T14:59:17Z")

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This is explained on github.

> **[GitHub - thunkable/webviewer-extension: Communicate between the Thunkable Web...](https://github.com/thunkable/webviewer-extension/)**
>
> Communicate between the Thunkable Web Viewer and a website - GitHub - thunkable/webviewer-extension: Communicate between the Thunkable Web Viewer and a website

I have already used this as has actech in some examples.

The issue is that this forum is not to teach JavaScript. There are many forums that accomplish that task.

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_[View the full topic](https://community.thunkable.com/t/how-to-use-call-postmessage-and-whene-receives-message-with-web-viewer/525168)._