getCharacterDataChanged() doesn't return removed nodes

[aartrost]

Hi Rafael,

First of all I want to thank you for your efforts maintaining this library, it's been integral for detecting changes and maintaining undo history for an inline editor I've been working on.

Recently I ran into a problem where characterDataChanged was empty for a summary in which a text node is first emptied (node.data = "") and then removed from the dom. The resulting summary lists the removal of the node but not the changed characterData ( open console on http://jsfiddle.net/f153aczu/2/ )

This is causing problems with performing undo/redo as the node can be restored, but the text content of the Node is lost. That's why I suggest the following change (aartrost/mutation-summary@7936be7):

if (2 /* STAYED_IN */ !== this.treeChanges.reachabilityChange(target))

->

if ([2 /* STAYED_IN */, 5 /* EXITED */].indexOf(this.treeChanges.reachabilityChange(target)) === -1)

This change will enable the reporting of characterDataChanged for removed nodes, enabling users to properly restore said nodes.

PS: If you're interested I can propose an example based on my custom undo/redo build on top on mutation-summary.