better display of nan in table

src/skrubview/_data/templates/table-part.html

@@ -15,12 +15,12 @@
             data-value-repr="{{ row[idx].__repr__() }}"
             data-col-name-str="{{ summary.head.header[idx] }}"
             data-col-name-repr="{{ summary.head.header[idx].__repr__() }}"
-            {%- if row[idx] is none -%}
+            {%- if row[idx] | is_null -%}
             data-value-is-none=""
             {%- endif -%}
             data-dataframe-module="{{ summary.dataframe_module }}"
             onclick="displayValue(event)">
-            {%- if row[idx] is not none -%}
+            {%- if  not (row[idx] | is_null) -%}
             {{ row[idx] }}
             {%- endif -%}
         </td>

src/skrubview/_html.py

@@ -3,6 +3,7 @@
 import secrets
 
 import jinja2
+import pandas as pd
 
 try:
     from skrub import _selectors as s
@@ -46,6 +47,7 @@ def _get_jinja_env():
         "filter_isin_snippet",
     ]:
         env.filters[function_name] = getattr(_utils, function_name)
+    env.filters["is_null"] = pd.isna
     return env