Handlebars.js - Only show data if {{ image_url }} doesn't contain "questionmark"

Hi,

As you can see in this example, which I created on Codepen, some of the data don't have an image and whenever there's no image, a place holder image is shown:

https://codepen.io/itsthomas/pen/WyBazO

Is there any way in Handlebars.js to say that show the data only if the {{ image_url }} doesn't contain "questionmark"?

Something like this?

{{#each this}}
{{#if image_url !contains "questionmark"}}

    <li class='list-container'>
      <div class="image-container">
          <img src="{{ image_url }}">
      </div>
      <div class="name-container">
        {{ name }}
      </div>
      <div class='role-container'>{{{ role }}}</div>
    </li>

{{/if}}
{{/each}}

Code (markup):

 

I couldn't find any solution with Handlebars.js, so I did it in JavaScript

(function removeNoImage() {
  for(let key in data.staff) {
    if(data.staff[key].image_url.indexOf('questionmark') !== -1) {
      delete data.staff[key];
    }
  }
})();

Code (markup):