Fix the evaluation of JavascriptFunction objects

Author: mwouts

docs/changelog.md

@@ -1,7 +1,7 @@
 ITables ChangeLog
 =================
 
-2.4.0rc0 (2025-05-11)
+2.4.0rc1 (2025-05-11)
 ---------------------
 
 **Added**

docs/formatting.md

@@ -109,61 +109,3 @@ Please note that Pandas Style objects are rendered using
 their `.to_html()` method, which is less efficient that
 the default JS data export used by ITables.
 ```
-
-## HTML in cells
-
-### A simple example
-
-HTML content is supported, which means that you can have formatted text,
-links or even images in your tables:
-
-```{code-cell} ipython3
-pd.Series(
-    [
-        "<b>bold</b>",
-        "<i>italic</i>",
-        '<a href="https://github.com/mwouts/itables">link</a>',
-    ],
-    name="HTML",
-)
-```
-
-### Images in a table
-
-```{code-cell} ipython3
-:tags: [full-width]
-
-df = itables.sample_dfs.get_countries(html=False)
-
-df["flag"] = [
-    '<a href="https://flagpedia.net/{code}">'
-    '<img src="https://flagpedia.net/data/flags/h80/{code}.webp" '
-    'alt="Flag of {country}"></a>'.format(code=code.lower(), country=country)
-    for code, country in zip(df.index, df["country"])
-]
-df["country"] = [
-    '<a href="https://en.wikipedia.org/wiki/{}">{}</a>'.format(country, country)
-    for country in df["country"]
-]
-df["capital"] = [
-    '<a href="https://en.wikipedia.org/wiki/{}">{}</a>'.format(capital, capital)
-    for capital in df["capital"]
-]
-df
-```
-
-### Base64 images
-
-[Base64 encoded image](https://stackoverflow.com/a/8499716/9817073) are supported, too:
-
-```{code-cell} ipython3
-pd.Series(
-    {
-        "url": '<img src="https://storage.googleapis.com/tfds-data/visualization/fig/mnist-3.0.1.png" height="50" alt="MNIST">',
-        "base64": '<img src="data:image/png;base64, iVBORw0KGgoAAAANSUhEUgAAAAUA'
-        "AAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO"
-        '9TXL0Y4OHwAAAABJRU5ErkJggg==" alt="Red dot">',
-    },
-    name="Images",
-)
-```

src/itables/javascript.py

@@ -7,7 +7,7 @@
 from base64 import b64encode
 from importlib.util import find_spec
 from pathlib import Path
-from typing import Any, Mapping, Optional, Sequence, Union, cast
+from typing import Any, Optional, Sequence, Union, cast
 
 import numpy as np
 import pandas as pd
@@ -275,8 +275,13 @@ def get_keys_to_be_evaluated(data) -> list[list[Union[int, str]]]:
     keys_to_be_evaluated = []
     if isinstance(data, Sequence):
         data = dict(enumerate(data))
-    if isinstance(data, Mapping):
+    if isinstance(data, dict):
         for key, value in data.items():
+            if isinstance(value, JavascriptFunction):
+                # eval can't evaluate a function,
+                # but it can evaluate an expression that contains a function
+                # e.g. eval('(function() {return 5;})') does returns the function
+                data[key] = f"({value})"
             if isinstance(value, (JavascriptCode, JavascriptFunction)):
                 keys_to_be_evaluated.append([key])
             else:

src/itables/version.py

@@ -1,3 +1,3 @@
 """ITables' version number"""
 
-__version__ = "2.4.0rc0"
+__version__ = "2.4.0rc1"