# Help in adding Html with Css and Javascript
**URL:** \
**Category:** Questions about Thunkable X\
**Created:** [May 31, 2020, 2:45am UTC](https://community.thunkable.com/t/help-in-adding-html-with-css-and-javascript/590775 "2020-05-31T02:45:18Z")\
**Posts on this page:** 6\
**Page:** 1
Hello everyone I was adding html code in webviewer with css and js but it didn’t work.
Here’s my inlined html code, it’s a simple slideshow -
```
data:text/html,
caption1
Caaption 2
```
After this I tried external src for css and js but that also seems broken. Please help me to run this html.
---
Hello,
You need to get rid of all single-line comments.
See a more reliable way to exchange data between App and WebViewer using WebViewer.postMessage
---
Thanks @actech but removing single-line comments didn’t helped. But I found my html code with external css and js is working in Kodular Webview but not in Thunkable cross platform.
Here’s that code -
`
Does not work on Android? The fact is that Data URI doesn’t work in apps installed on iOS, so I left examples of working with Data URI in my demo application, but I recommend using a different mechanism.
I’ll look at your code
---
The problem is that your first code doesn’t work in the browser. First, you need to make sure that the code works in the browser. But you secont code run in browser.
Try this Example
`data:text/html, `
check your example
[https://x.thunkable.com/projects/5ed376e686515550ed6044eb/project/properties/designer/](https://x.thunkable.com/projects/5ed376e686515550ed6044eb/project/properties/designer/)
---
