Realtime Preference Center - Javascript Blocked

(1) Share

Report

Posted on by Florent@Inetum

Hello,

I am trying to add Javascript to Preference Center but it keeps being blocked because of a missing allow-scripts in the iframe.

Of course, the editor iframe does have the allow-scripts option.

Error:

Code:

I have the same question (0)

All responses (1)

Answers (0)

Suggested answer

Saif Ali Sabri 2,351 Super User 2025 Season 2 on at

Like (0)

Report
The error occurs because the iframe in which the Preference Center loads is sandboxed without the allow-scripts permission, preventing JavaScript execution.
Solution:

Check the iframe configuration
Ensure that the iframe embedding the Preference Center includes the allow-scripts attribute:

html

<iframe src="your-preference-center-url" sandbox="allow-scripts allow-same-origin"></iframe>
If the sandbox attribute is present but does not include allow-scripts, JavaScript will be blocked.

Modify the embedding page (if possible)
If you control the page embedding the Preference Center, update its iframe settings to allow scripts.

Check Content Security Policy (CSP)
Ensure your CSP settings in the header allow script execution:

html

Content-Security-Policy: script-src 'self' 'unsafe-inline' 'unsafe-eval' https://your-allowed-scripts.com;

If using a third-party tool (e.g., Dynamics 365)

Check if the Preference Center provider allows script execution inside iframes.

If the iframe settings are controlled by a platform like Dynamics 365 Marketing, you might need to use alternative methods like custom event handlers or API calls instead of inline scripts.

If the issue persists and you cannot modify the iframe, consider embedding the script outside the Preference Center iframe (on the parent page). Let me know if you need more details!

Was this reply helpful? Yes No