Uncaught DOMException: Failed to read the 'localStorage' property from 'Window': The document is sandboxed and lacks the 'allow-same-origin' flag

[anaptfox]

Hi @CHAIMAA_DRIOUECH,

After digging into the original error you reported:

 Uncaught DOMException: Failed to read the ‘localStorage’ property from ‘Window’: The document is sandboxed and lacks the ‘allow-same-origin’ flag.

For security purposes, localStorage isn’t supported in the Custom HTML block. However, I did offer an alternative in another forum post that I think is related:

How to pass ctx variable inside the HTML Block in a Dashboard

@CHAIMAA_DRIOUECH, In your above post, you have some templating. But, unfortunately, templating is not supported in the Custom HTML Block. From what it seems like, the feature you’re describing would be a better fit as an Experience Page. Here is a great walkthrough to get you up to speed: https://docs.losant.com/experiences/walkthrough/views/overview/ Also, there is a full course on Experiences in Losant University.