I have created a JavaScript widget. I have used localstorage for setting and getting properties of the window.
When I open that widget in Chrome it throws an error:
Uncaught DOMException: Failed to read the 'localStorage' property from 'Window': Access is denied for this document.
If I allow third party cookies in the browser it's working properly. The problem is that I cannot allow third parties cookies of every user manually. What is a solution to this?
You should consider to use this browser API instead:
https://developer.mozilla.org/en-US/docs/Web/API/Window/postMessage
Since the local storage is only related to the specific domain, so it can not be used across different domains.
For example: if the iframe domain is "www.aaa.com" and page domain is "www.bbb.com", the iframe can not access to the page related local storage. No problem if they are in the same domain.
A complete explanation about this argument can be found here:
https://developer.mozilla.org/en-US/docs/Web/API/Window/localStorage
