dosubot[bot] commented on issue #30381:
URL: https://github.com/apache/superset/issues/30381#issuecomment-2372576873
<!-- Answer -->
The `class` attribute is still empty in the output HTML because the
`HTML_SANITIZATION_SCHEMA_EXTENSIONS` configuration is not set correctly. The
`className` attribute is not necessary and might be causing issues. You only
need to include the `class` attribute.
Here is the corrected configuration:
```python
HTML_SANITIZATION = True
HTML_SANITIZATION_SCHEMA_EXTENSIONS = {
"attributes": {
"*": ["style", "class"],
},
"tagNames": ["style"],
}
```
Make sure this configuration is included in your `superset_config.py` file
and restart Superset to apply the changes
<sup>[[1]](https://github.com/apache/superset/blob/master/superset/config.py)</sup>.
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