Is there any way to insert a callback before/after a templates context is updated?

Question

I'm aware of Template.onRendered, however I have the need to destroy and setup some plugins that act on the dom when the actual context is updated.

So saying I have content template, I'd need something similar to the following:

Template.content.onBeforeChange(function () {
  $(".editor").editable("destroy");
});

Template.content.onAfterChange(function () {
  $(".editor").editable();
});

Is there any current way I can achieve this with the existing Template api?

Vookles

Answer 1

You should be able to detect a context change within a template autorun by looking at currentData like this:

Template.content.onRendered(function() {
  this.autorun(function() {
    if (Template.currentData()) {
      // the context just changed - insert code here
    }
  });
});

I'm unclear if that works for your particular case because this technique only gets you the equivalent of onAfterChange.

Biblical

You're correct, though looking into it, it appears that the blaze template system wouldn't support a callback before the context is updated. So this will be the answer, thank you :) – Vookles