Work with jsdom without global values

[vilicvane]

Trying to use diff-dom in non-test Node.js project with jsdom, I noticed the document option that allows manually specifying the value, but that option along does not work.

The issue is caused by DiffFInder doing a global typeof Element check that prevents the expected nodeToObj() conversion:

https://github.com/fiduswriter/diffDOM/blob/8f19b20a5e8e1f8d1db488a8b9e26e1fc745ec34/src/diffDOM/virtual/diff.ts#L42C1-L43

Workaround:

dd.diff(nodeToObj(elementA), nodeToObj(elementB));

[johanneswilm]

Please provide minimal example @vilicvane

[kapouer]

Got an error with that too.
The check here:

diffDOM/src/diffDOM/helpers.ts

Line 35 in 08d4f15

typeof element?.ownerDocument?.defaultView?.[elementTypeName] ===

assumes that element.ownerDocument is live.
However document.cloneNode().defaultView == null.

The test should fall back to nodeToObj in that case, cause it is impossible to check inheritance in that case.