How to pass variable to a JSON stored and loaded manifest?

[tmikaeld]

This worked fine when the manifest was inline, but when loaded from JSON - any previously defined variables are unreachable.

[ermouth]

Please provide code or better explanation what exactly you are doing and where you think you loose data.

[tmikaeld]

I'm loading the manifest from JSON, it's been encoded with $.my.tojson(manifest) and it works fine, but the var itemID variable that i declare before manifest is invisible to the itemID i have declared in the manifest code. Is the manifest code running in a different namespace?

var itemID = "something";

var manifest = manifestJson;

// Init $.my
$('.editForm').my(manifest, person);

[ermouth]

Manifests passed as folded JSON never see local scope, only global. So they see window and all its members – but do not see local scopes.

Main consideration is safety. Since we have $.my.cache() that unfold manifest before caching, we must guarantee, that no code is executed while caching. So $.my does not use eval, it use new Function constructor, that is always executed in global scope (to be precise – without any scope).

To add local scope to manifest instance use this pattern:

• put folded manifest to cache (it must have .id property)
• when manifest needed, get it from cache – you‘ll receive unfolded clone – and augment/decorate it with functions, that can return all required data from local scope.

Or you can just mount your data directly to manifest before you start it.