Using key / context in helpers

[btalb]

Consider the following two uses of a custom helper that needs to know information about the evaluation context in which it's been run:

{{#each robots}}
{{helperThatNeedsToKnowWhichRobot this}}
{{/each}}

{{#with robots.husky}}
{{helperThatNeedsToKnowWhichRobot this}}
{{/with}}

In the first case, my helper receives an options object with the following useful data fields:

    data: {                                                                                              
      root: [Object],                                                                                    
      _parent: [Object],                            
      key: 'husky',                                 
      index: 2,                                     
      first: false,                                 
      last: false                                   
    },  

But the second example gives me nothing to work with:

    data: { root: [Object] }

How can I implement the described helper which will also work in a with evaluation context?

[jaylinski]

If I understand you correctly, you want to access the robots-object inside the robots.husky-block as a _parent-object when using the with-helper?

I guess that's a reasonable feature request. Should be doable by simply copying these lines to the with.js-helper:

• https://github.com/handlebars-lang/handlebars.js/blob/v4.7.7/lib/handlebars/helpers/each.js#L32-L34
• https://github.com/handlebars-lang/handlebars.js/blob/v4.7.7/lib/handlebars/helpers/each.js#L38

Would be nice if you could open a PR with a fix and a test-case. I'm not sure if this would be a breaking change, since some helpers may rely on the _parent-object not to be present. 🤔