[docs] Improve CSP guide with required directives#48258
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…distinction Restructure the Content Security Policy guide to clearly explain: - Which CSP directives Material UI requires and why - The difference between static and dynamic website setups - That style-src-attr 'unsafe-inline' is needed for SSR due to inline style attributes, but not for client-only apps - That nonces require a server and can't be used with static hosting
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mj12albert
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Apr 16, 2026
| With a server, you can generate a unique nonce per request for tighter security. Material UI requires the following CSP directives: | ||
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| - **`style-src-elem 'nonce-<base64>'`** — Material UI uses [Emotion](https://emotion.sh/) to inject `<style>` tags. Each tag needs a matching nonce. | ||
| - **`style-src-attr 'unsafe-inline'`** — Some components apply inline `style` attributes for dynamic values (CSS custom properties, dimensions, positioning). |
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Should mention here this is only needed for SSR and not CSR? (saw this is mentioned in the PR description but doesn't seem to be in the doc)
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I renamed the title from "dynamic hosting" back to "Server-Side Rendering (SSR)"
mj12albert
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Apr 17, 2026
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Summary
style-src-elem,style-src-attr, andscript-srcstyle-src-attr 'unsafe-inline'is only needed for SSR (React's CSSOM API is CSP-safe in client-only apps)