Tabulator: HTMLTemplateFormatter not working when referencing other columns

[maximlt]

from datetime import datetime
import panel as pn
import pandas as pd
from bokeh.models import HTMLTemplateFormatter

pn.extension('tabulator')

htmlfmt = HTMLTemplateFormatter(
    template='<%= X %> <%= value %>'
)

df = pd.DataFrame({
    'W': [datetime.now(), datetime.now(), datetime.now()],
    'X': ['aaa', 'bbb', 'ccc'],
    'Y': ['111', '222', '333'],
    'Z': [0, 1, 2],
})

# pn.widgets.DataFrame(
pn.widgets.Tabulator(
    df,
    formatters={'Y': htmlfmt},
).servable()

Web console traceback:

Uncaught (in promise) ReferenceError: X is not defined
    at eval (eval at h.template (bokeh-tables.min.js?v=21eea25553985e6a1d89f7fd52911752721d20b436701249917fc76f5464936d10c1f5005d504479c6540681d83b84e584f94a096c58f3cbd94d48d7a077990a:55:1989), <anonymous>:6:9)
    at o (bokeh-tables.min.js?v=21eea25553985e6a1d89f7fd52911752721d20b436701249917fc76f5464936d10c1f5005d504479c6540681d83b84e584f94a096c58f3cbd94d48d7a077990a:55:2101)
    at E.doFormat (bokeh-tables.min.js?v=21eea25553985e6a1d89f7fd52911752721d20b436701249917fc76f5464936d10c1f5005d504479c6540681d83b84e584f94a096c58f3cbd94d48d7a077990a:50:4333)
    at s.formatter (panel.min.js?v=fd49dd7ffc1373c0b731ba07c08299615cc2634d5cf07047e8b7cf847d27b74f:62:13703)
    at re.formatValue (Format.js:135:47)
    at InternalEventBus.js:76:33
    at Array.forEach (<anonymous>)
    at y._chain (InternalEventBus.js:75:21)
    at o.chain (CoreFeature.js:82:30)
    at o._generateContents (Cell.js:99:14)

But it works with the DataFrame widget:

---

After a quick search I think the issue is in this line where formatting should be given the dataContext to access the values from other rows. No idea how straightforward it is to implement that. I hope I can find some time to look more into it this week.

https://github.com/holoviz/panel/blob/v1.4.1a1/panel/models/tabulator.ts#L856

---

It was already reported on Discourse a while back: https://discourse.holoviz.org/t/using-tabulator-bokeh-htmltemplateformatter-to-create-a-cell-that-uses-another-columns-data-as-the-link/5355