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Strict CSP breaks bold tags in annotation text #7380

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Labels
P2considered for next cycle bugsomething broken
@inari-mchristie

Description

Using the new strict CSP support breaks bold tags in annotation text.

Steps to reproduce:

  1. Include the plotly.css file.
  2. Content Security Policy that disallows inline stylesheets.
  3. Annotations where the text includes <b> tag.

I've reproduced this problem in Vue 3 with Plotly 3.0.1 here: https://stackblitz.com/edit/vitejs-vite-1gco7d7q?file=src%2Fcomponents%2FPlotlyExample.vue

The Plotly code is like so, with bold tags around the text annotations X axis and Y axis

 Plotly.newPlot(plotlyContainer.value, [{ x: [1, 2, 3], y: [2, 1, 2] }], {
 annotations: [
 {
 xref: 'paper',
 yref: 'paper',
 x: 0,
 xanchor: 'right',
 y: 1,
 yanchor: 'bottom',
 text: '<b>X axis</b> label',
 showarrow: false,
 },
 {
 xref: 'paper',
 yref: 'paper',
 x: 1,
 xanchor: 'left',
 y: 0,
 yanchor: 'top',
 text: '<b>Y axis</b> label',
 showarrow: false,
 },
 ],
 });

CSP:

 <meta
 http-equiv="Content-Security-Policy"
 content="default-src 'self'; img-src 'self' data: blob:; style-src 'self' 'sha256-jehvI5/Zi1PSH21Fi6ZfQYAtiGucyVGUH4ziRLU+Bfc=';"
 />

(NOTE: because of how the Vite dev server works, I need to include the sha256 checksum of the plotly-3.0.1.css file, in a production build it wouldn't be necessary.)

Expected result:

Image

I produced this image by commenting out the CSP meta tag in the reproduction code linked to above.

Actual result:

Image

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