The patch versions (v0.1.29 - v0.1.31) that have been released on the v0.1.x branch, to reflect the changed maintainers, are branched off from v0.1.27 so they don't include the breaking changes introduced in xmldom-alpha@v0.1.28:

Maintainer changes

After the last commit to the original repository https://github.com/jindw/xmldom on the 9th of May 2017, the first commit to https://github.com/xmldom/xmldom is from the 19th of December 2019. The fork has been announced in the original repository on the 2nd of March 2020.

The versions listed below have been published to one or both of the following packages:

It is currently not planned to continue publishing the xmldom-alpha package.

The new maintainers did not invest time to understand changes that led to the last xmldom version 0.1.27 published by the original maintainer, but consider it the basis for their work. A timeline of all the changes that happened from that version until 0.3.0 is available in https://github.com/xmldom/xmldom/issues/62. Any related questions should be asked there.