I’m working on a project using Handlebars to render HTML templates.

I’m trying to pass an index from my template to a partial. In my partial, I then attempt to pass it to a custom helper function. The index is correctly displayed in the partial but is undefined within the helper function.

Here’s a simplified version of my setup:

<!-- template code -->
  {{#each item}}
    {{> feedback index=@index}}
  {{/each}}

  <feedback>
    <!-- The index is shown as expected -->
    index?: {{index}}
    <h1>
      <!-- In the helper, index is undefined -->
      {{displayFeedback product='product123' index=index }}
    </h1>
  </feedback>

Here is the function I am registering:

  displayFeedback(options) {
    // index is undefined, product is as expected
    const { index, product } = options.hash;
    // more logic....
  };

I have tried directly accessing the context as well as trying to access the parent context with no success.