Slide with Math does not show when plotly graph on another slide and `embed-resources: true`

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@cderv is already working on this.

Since Oct 7, 2025.

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Description

bug engines-jupyter math plotly revealjs 
---
format: revealjs
keep-ipynb: true
---

## Math

$$
1 + 1
$$

$1+1$

## Plotly script

```{python}

#| echo: false
#| output: true

import plotly.graph_objects as go
import numpy as np

C = 0
x_range = np.linspace(-10, 10, 100)
y_initial = np.full_like(x_range, C)
fig = go.Figure()
fig.add_trace(
    go.Scatter(
        x=x_range,
        y=y_initial,
        mode='lines',
        name=f'Y = {C:.2f}',
        line=dict(width=3)
    )
)

fig

```

This works ok it seems, but Plotly usage will add a second time the Mathjax library. Related to

  • #12882

when using embed-ressources: true this creates problem as math won't show in first slide

Image

without the plotly part, it shows ok (with default self-contained-math: false, or opt-in to true)

Image

What happens is that plotly insertion of mathjax is conflicting. And it seems this is added always, even when math not used.

Probably related to include_mathjax option being activated somehow in our jupyter context execution . Some renderer have it to false: https://github.com/plotly/plotly.py/tree/main/plotly/io

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