# Custom JavaScript in UI
**URL:** https://community.zammad.org/t/custom-javascript-in-ui/1867
**Category:** Technical assistance
**Created:** [December 31, 2018, 10:15am UTC](https://community.zammad.org/t/custom-javascript-in-ui/1867 "2018-12-31T10:15:05Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@jampy](https://community.zammad.org/u/jampy)
#### Post date: [December 31, 2018, 10:15am UTC](https://community.zammad.org/t/custom-javascript-in-ui/1867/1 "2018-12-31T10:15:05Z")
Is there a elegant way to add a custom tag to the Zammad UI?
I’d like to add custom functionality but don’t want to mess with the Zammad source code itself. A simple Tag in the header allowing me to run API requests and show IFRAMEs would be all I need.
Is there such a configuration?
---
### Author:  [@MrGeneration](https://community.zammad.org/u/MrGeneration)
#### Post date: [January 2, 2019, 11:31am UTC](https://community.zammad.org/t/custom-javascript-in-ui/1867/3 "2019-01-02T11:31:22Z")
That’s not possible without changing Zammads source code, I’m sorry.
(Edit: Unless you want to do some dirty stuff with rewrite rules and use your own js that also contains zammads js but again, that’s a maximum pervy dose )
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### Author:  [@jampy](https://community.zammad.org/u/jampy)
#### Post date: [January 2, 2019, 1:00pm UTC](https://community.zammad.org/t/custom-javascript-in-ui/1867/4 "2019-01-02T13:00:26Z")
Since I’m using (currently testing) my own installation - what would be the “best” way to alter the source code so that my tag gets served along with the UI?
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### Author:  [@MrGeneration](https://community.zammad.org/u/MrGeneration)
#### Post date: [January 3, 2019, 9:23am UTC](https://community.zammad.org/t/custom-javascript-in-ui/1867/5 "2019-01-03T09:23:38Z")
You can find the important stuff relevant to youi in
`/opt/zammad/app/assets/javascripts/` the `application.js` is Zammads javascript file.
After changing the file, you need to tell Zammad the changes by:
```auto
systemctl stop zammad
zammad run rails assets:precompile
systemctl start zammad
```
Changes should take affect then.
If needed, you can remove your current javascript compiles to ensure zammad really writes them: `rm /opt/zammad/public/assets/*.js*`
---
### Author:  [@system](https://community.zammad.org/u/system)
#### Post date: [February 21, 2020, 2:15am UTC](https://community.zammad.org/t/custom-javascript-in-ui/1867/6 "2020-02-21T02:15:07Z")
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