# How to create a Handlebar helper function
**URL:** https://meta.discourse.org/t/how-to-create-a-handlebar-helper-function/214407
**Category:** Development
**Created:** [January 10, 2022, 4:26pm UTC](https://meta.discourse.org/t/how-to-create-a-handlebar-helper-function/214407 "2022-01-10T16:26:22Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@Kumar\_Karuppaiah](https://meta.discourse.org/u/Kumar_Karuppaiah)
#### Post date: [January 10, 2022, 4:26pm UTC](https://meta.discourse.org/t/how-to-create-a-handlebar-helper-function/214407/1 "2022-01-10T16:26:22Z")
Hi,
I want to create a new helper function which can be across the application. I am not sure how to create a helper function.
Likewise, I tried myself to create a helper function, but it is not working.
Please find my code.
I am referring to this helper function in .hbr file. Please find the attached screenshot.
Please suggest me.
Thanks
Kumar
---
### Author:  [@Kumar\_Karuppaiah](https://meta.discourse.org/u/Kumar_Karuppaiah)
#### Post date: [January 11, 2022, 9:47am UTC](https://meta.discourse.org/t/how-to-create-a-handlebar-helper-function/214407/2 "2022-01-11T09:47:12Z")
Can anyone please help me on this?
---
### Author:  [@pfaffman](https://meta.discourse.org/u/pfaffman)
#### Post date: [January 11, 2022, 10:48am UTC](https://meta.discourse.org/t/how-to-create-a-handlebar-helper-function/214407/3 "2022-01-11T10:48:21Z")
Did you see [Developer’s guide to Discourse Themes](https://meta.discourse.org/t/developer-s-guide-to-discourse-themes/93648)?
What I usually do is look at existing themes or plugins for examples.
EDIT: But if you’re lucky @Johani will provide a really thoughtful and helpful answer. And you’re lucky!
---
### Author:  [@Johani](https://meta.discourse.org/u/Johani)
#### Post date: [January 11, 2022, 1:23pm UTC](https://meta.discourse.org/t/how-to-create-a-handlebar-helper-function/214407/4 "2022-01-11T13:23:49Z")
Your code should work, but you’re using your helper
```Handlebars
{{sample}}
```
in the template without passing it any arguments. Even if you’re testing to see if things work, pass it a test string like
```Handlebars
{{sample "some string"}}
```
You need to do that because you’re using the helper in a raw `hbr` template. For testing purposes, the helper should work even if you don’t pass it anything in regular `hbs` templates.
If you’re creating a block-helper, then it needs to have `#` and you need to close it like so.
```Handlebars
{{#sample}}
{{/sample}}
```
Adding `~` to your helper optionally trims whitespace between any HTML tags it returns. So
```Handlebars
{{~#sample}}
{{/sample}}
```
---
### Author:  [@Kumar\_Karuppaiah](https://meta.discourse.org/u/Kumar_Karuppaiah)
#### Post date: [January 12, 2022, 6:59am UTC](https://meta.discourse.org/t/how-to-create-a-handlebar-helper-function/214407/5 "2022-01-12T06:59:29Z")
Thank you so much for your reply. It is working fine now,
---
### Author:  [@Kumar\_Karuppaiah](https://meta.discourse.org/u/Kumar_Karuppaiah)
#### Post date: [January 12, 2022, 7:13am UTC](https://meta.discourse.org/t/how-to-create-a-handlebar-helper-function/214407/6 "2022-01-12T07:13:54Z")
Hi,
Thank you for your reply. You are helping me a lot.
Yes, I have already gone through the documentation, existing themes and few examples, and created this sample project. But I am not sure about how to call the helper function in handlebar file. I tried it in multiple ways, and it was not working. That’s why, I posted here.
Thanks
Kumar
---
### Author:  [@pfaffman](https://meta.discourse.org/u/pfaffman)
#### Post date: [January 12, 2022, 12:13pm UTC](https://meta.discourse.org/t/how-to-create-a-handlebar-helper-function/214407/7 "2022-01-12T12:13:49Z")
Your question helped me too, thanks to @Johani! I’m going to look at refactoring some of my code as a result.