# Trouble adding Ember helper
**URL:** https://meta.discourse.org/t/trouble-adding-ember-helper/43764
**Category:** Development
**Created:** [May 5, 2016, 11:10pm UTC](https://meta.discourse.org/t/trouble-adding-ember-helper/43764 "2016-05-05T23:10:22Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@stevenpslade](https://meta.discourse.org/u/stevenpslade)
#### Post date: [May 5, 2016, 11:10pm UTC](https://meta.discourse.org/t/trouble-adding-ember-helper/43764/1 "2016-05-05T23:10:22Z")
Continuing the discussion from [How to add an Ember js helper?](https://meta.discourse.org/t/how-to-add-an-ember-js-helper/40214):
I am trying to add an Ember helper but having no luck. I get this error:
`Uncaught Error: Assertion Failed: A helper named 'color-shade' could not be found`
Below is my helper, `color-shade.js` …
```
import Ember from 'ember';
export function colorShade(params) {
//just placeholder code for now
return params[0] === params[1];
}
export default Ember.Helper.helper(colorShade);
```
---
### Author:  [@eviltrout](https://meta.discourse.org/u/eviltrout)
#### Post date: [May 6, 2016, 2:48pm UTC](https://meta.discourse.org/t/trouble-adding-ember-helper/43764/2 "2016-05-06T14:48:09Z")
Where did you put the helper? The location of the file matters.
---
### Author:  [@stevenpslade](https://meta.discourse.org/u/stevenpslade)
#### Post date: [May 6, 2016, 4:14pm UTC](https://meta.discourse.org/t/trouble-adding-ember-helper/43764/3 "2016-05-06T16:14:47Z")
I am defining the helper in:
`assets/javascripts/discourse/helpers/color-shade.js`
I am using the helper for a plugin outlet:
`assets/javascripts/discourse/components/connectors/topic-category/topic-header.hbs`
---
### Author:  [@eviltrout](https://meta.discourse.org/u/eviltrout)
#### Post date: [May 6, 2016, 4:18pm UTC](https://meta.discourse.org/t/trouble-adding-ember-helper/43764/4 "2016-05-06T16:18:24Z")
Try the extension `.js.es6` – otherwise it’s not autoloaded.
---
### Author:  [@stevenpslade](https://meta.discourse.org/u/stevenpslade)
#### Post date: [May 6, 2016, 4:36pm UTC](https://meta.discourse.org/t/trouble-adding-ember-helper/43764/5 "2016-05-06T16:36:50Z")
Nice, good news is that `A helper named 'color-shade' could not be found` is no longer occurring.
Bad news is that I am now getting the error: `Uncaught TypeError: Cannot read property 'helper' of undefined` in regards to:
`export default Ember.Helper.helper(colorShade);`
Do I need to import `Ember.Helper`?
---
### Author:  [@eviltrout](https://meta.discourse.org/u/eviltrout)
#### Post date: [May 6, 2016, 4:39pm UTC](https://meta.discourse.org/t/trouble-adding-ember-helper/43764/6 "2016-05-06T16:39:18Z")
I think that’s the newer ember api. We’re on an older version. I’d suggest just looking at how [the discourse helpers are defined](https://github.com/discourse/discourse/tree/master/app/assets/javascripts/discourse/helpers) and copying that.
---
### Author:  [@stevenpslade](https://meta.discourse.org/u/stevenpslade)
#### Post date: [May 6, 2016, 4:46pm UTC](https://meta.discourse.org/t/trouble-adding-ember-helper/43764/7 "2016-05-06T16:46:00Z")
👌 Bingo! Defining my helper the following way did the trick:
```
import registerUnbound from 'discourse/helpers/register-unbound';
registerUnbound('color-shade', function(params) {
console.log(params);
});
```
Thanks!