If I have an template like this:

{{#each data}}
<span class="{{@key}}">{{this}}</span>
{{/each}}

Handlebars will render nothing when data is a dict entry with empty value, i.e. if I render above template with

template({data: {
    'first': null,
    'second': 'bar',
}});

Only second will be rendered, but first will be ignored.

I have made a JSFiddle to demonstrate the behaviour:

• old behaviour with Handlebars 3.0.3, where it will render first https://jsfiddle.net/jag017t2/1/
• new behaviour with Handlebars 4.0.2, where it will skip first https://jsfiddle.net/5n6t61kz/5/

I have tested the behaviour with 4.0.0 and it is skipped there as well, so it's a problem introduced in 4.0.0.

Is this the intended behaviour now? It is not stated in the documentation and I can't see a good match in the release notes. It breaks our application, since we expect to have 7 <td> columns rendered by Handlebars, but 2 are missing due to null values.