For D8 instead of porting this module should be used this one https://www.drupal.org/project/xls_serialization

For *.xlsx extension support in scope of xls_serialization look next issues:

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Zemelia created an issue. See original summary.

Zemelia’s picture

Zemelia commented
Status: Patch (to be ported) » Needs review
colan’s picture

colan
he/him
Primary language English
Location Toronto 🇨🇦
commented
Issue summary: View changes

Fixing links to use d.o-specific markup, which provides more info.