Fixed double-click handling for column width reset

src/myfasthtml/core/utils.py

@@ -2,6 +2,7 @@ import importlib
 import logging
 import re
 
+import pandas as pd
 from bs4 import Tag
 from fastcore.xml import FT
 from fasthtml.fastapp import fast_app
@@ -10,9 +11,9 @@ from rich.table import Table
 from starlette.routing import Mount
 
 from myfasthtml.core.constants import Routes, ROUTE_ROOT
+from myfasthtml.core.dsl.exceptions import DSLSyntaxError
 from myfasthtml.core.dsl.types import Position
 from myfasthtml.core.dsls import DslsManager
-from myfasthtml.core.dsl.exceptions import DSLSyntaxError
 from myfasthtml.test.MyFT import MyFT
 
 utils_app, utils_rt = fast_app()
@@ -181,6 +182,10 @@ def is_datalist(elt):
     return False
 
 
+def is_null(v):
+  return v is None or pd.isna(v) or pd.isnull(v)
+
+
 def quoted_str(s):
   if s is None:
     return "None"
@@ -326,7 +331,7 @@ def make_safe_id(s: str | None):
 def make_unique_safe_id(s: str | None, existing_ids: list):
   if s is None:
     return None
-
+  
   base = make_safe_id(s)
   res = base
   i = 1
@@ -335,6 +340,7 @@ def make_unique_safe_id(s: str | None, existing_ids: list):
     i += 1
   return res
 
+
 def get_class(qualified_class_name: str):
   """
     Dynamically loads and returns a class type from its fully qualified name.