JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/handlebars.js/4.0.5/handlebars.js"></script>
<div id="output"></div>
<script type="template/handlebars" id="template">
	{{#each list}}
  	{{#unless ./condition}}
    	{{log 'this' .}} 
      {{log 'super' ..}}
      b="{{b}}" 
      parent="{{../value}}"<br>
    {{/unless}}
  {{/each}}
</script>

JavaScript

var template = Handlebars.compile(document.getElementById('template').innerHTML);

document.getElementById('output').innerHTML = template({
	condition: false,
  value: 'parent value',
  list: [
    null,
  	{a:true, b:'this is true'},
  	{a:false, b:'this is false'},
  	{a:null, b:'this is null'}
  ]
});