[Request] Ability to check if a given 'contentFor' has been set

[zvictor]

Considering that

• almost every time we use a contentFor we have a wrapper around it (usually a header, footer or just a div with some classes);
• when there is no content for a given region, usually there is no reason to keep the empty wrapper there.
• a wrapper with no content is obviously harder to hide than a wrapper that just does not exist.
  • Sometimes it can be considerable hard to hide the empty wrapper without screwing the rest of your css.

Than I infer that we should have a way to use some kind of if statement to check if we should add a region code with its wrapper inside our html.

That's an example to express my idea:

<template name="MyLayout">
  <h1>My Layout</h1>

  <div>
    {{> yield}}
  </div>

{{#if [THE FOOTER CONTENT HAS BEEN DEFINED]}}
  <footer>
    {{> yield region="footer"}}
  </footer>
{{/if}}
</template>

Is there a way to do it now? If not, is it possible for us to implement it, and what would be a good "syntax" for that?

[tmeasday]

Hi @zvictor - check out the pass-regions-as-arguments branch.

The API isn't totally decided yet, but as it stands, it adds 3 features:

1. You can attach templates to regions via {{#Layout regionName='templateName'}} (rather than contentFor)
2. You can check for defined regions via {{#if hasYield}}
3. You can use "text" content (rather than templates) with {{yield region='regionName' text=true}}.

Give it a try. I'd love to hear feedback on any issues and also what you think about the API.