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**Category:** Uncategorized\
**Created:** [December 18, 2014, 11:03am UTC](https://discuss.emberjs.com/t/htmlbars-custom-if-helper/6949 "2014-12-18T11:03:14Z")\
**Posts on this page:** 5\
**Page:** 1
**Author:**  [@gwenaelp](https://discuss.emberjs.com/u/gwenaelp)\
**Post date:** [December 18, 2014, 11:03am UTC](https://discuss.emberjs.com/t/htmlbars-custom-if-helper/6949/1 "2014-12-18T11:03:14Z")
Hello,
I’m currently migrating a large code base to HTMLBars. I’m currently having trouble with a custom if helper I wrote.
```
{{#each arrayItem in controller.arrayOfItems}}
!!{{arrayItem.label}}!!
{{#ifUserCanDisplayView arrayItem.value}}
**{{arrayItem.label}}**
{{/ifUserCanDisplayView}}
{{/each}}
Ember.HTMLBars.helper('ifCustom', function(params, hash, options, env) {
if(1)
return options.template.render(this, env, options.morph.contextualElement);
});
```
Actually, the generated html contains the part inside the if, but I cannot access anymore to the variable arrayItem.
So this is basically what I get:
```
!!labelX!!
****!!labelY!!
****
```
Does anybody knows how it is possible with HTMLBars to bind the context outside the if helper inside it too? I’m quite lost with the new API… 😕
Thanks in advance for your help!
---
**Author:**  [@rwjblue](https://discuss.emberjs.com/u/rwjblue)\
**Post date:** [December 18, 2014, 12:42pm UTC](https://discuss.emberjs.com/t/htmlbars-custom-if-helper/6949/2 "2014-12-18T12:42:33Z")
Would be easier to help if you provided a simple JSBin. Would you mind whipping one together?
You can use [JS Bin - Collaborative JavaScript Debugging](http://emberjs.jsbin.com/rwjblue/167/edit) as a starting point if you’d like…
---
**Author:**  [@gwenaelp](https://discuss.emberjs.com/u/gwenaelp)\
**Post date:** [December 18, 2014, 2:00pm UTC](https://discuss.emberjs.com/t/htmlbars-custom-if-helper/6949/3 "2014-12-18T14:00:03Z")
Hello,
Thank you for your answer!
I prepared a JSBin : [JS Bin - Collaborative JavaScript Debugging](http://emberjs.jsbin.com/fuzekegage/2/edit)
I actually realized I was using the prod version. With the debug version, there is one error message, but no html generated.
“Error: Assertion Failed: makeBoundHelper generated helpers do not support use with blocks”
I don’t know what are my options to pass through this problem. I saw that there are only BoundHelpers and ViewHelpers by inspecting Ember.HTMLBars object, but I can’t find an easy way to get some more information about it… 😕
---
**Author:**  [@jschaftenaar](https://discuss.emberjs.com/u/jschaftenaar)\
**Post date:** [December 18, 2014, 7:16pm UTC](https://discuss.emberjs.com/t/htmlbars-custom-if-helper/6949/4 "2014-12-18T19:16:12Z")
See the bottom of the page [http://emberjs.com/api/classes/Ember.Handlebars.html#method\_makeBoundHelper](http://emberjs.com/api/classes/Ember.Handlebars.html#method_makeBoundHelper)
USE WITH BLOCKS NOT SUPPORTED
I believe you need to use a computed property
---
**Author:**  [@rwjblue](https://discuss.emberjs.com/u/rwjblue)\
**Post date:** [December 18, 2014, 7:55pm UTC](https://discuss.emberjs.com/t/htmlbars-custom-if-helper/6949/5 "2014-12-18T19:55:51Z")
Correct. You need to use `Ember.HTMLBars.registerHelper` (note this is **not** bound so you have to subscribe and rerender when input param changes).