Required attachments

[yckart]

It would nice to have the possibility to add dependent attachments.

Sure, we could do this simply like so:

Attach.add('pluginName1', function(el) {
  var deps = el.dataset.split(' ')
  if (~deps.indexOf('pluginName2') && ~deps.indexOf('pluginName4')) {
    // stuff
  }
})

...however, makes sense to me to let this managed internally:

Attach.add('pluginName1', ['pluginName2', 'pluginName4'], function(el) {
  // stuff...
})

Update
Just don't know what's the best way to go. Either check if the current node resolves all dependencies, or for the existence of those dependencies somewhere in the dom...

[mrmartineau]

@yckart I agree. I have been using Attach on a project recently and have often found issues with loading and instantiation where one attachment depends on another, or if one manipulates the DOM onLoad/DOMContentReady and another is skipped because it sits within it.. (don't think that makes sense, butI think this sort of interface might help.

[nicbell]

@mrmartineau in situations where you have several modules that depend on each other I would write another module that governs their creation and any other inter-dependent logic. I would attach this module to the parent container instead of attaching all the child modules.

For example if you had several types of filters on a page that triggered each other. You could keep those filters single purpose and create a FilterManager module to take care of the depended business logic between the filters.

[yckart]

Let's assume that we want to add an editor to some sort of input field and in some cases (wysiwyg instead of markdown mode, or whatever reason) also a toolbar. This toolbar requires that the editor is attached, as the editor give's access to the current value and selection.

This might be not the best example, but would be a case where it could be helpful to have this feature available.