Is it ok to store a user's email in localStorage?

Question

XSS

There is an idea to remember the user's email:

There is an authorization form, if the visitor has successfully logged in, I save his email in localStorage.
The next time, when I visit a page with a login form, I insert his soap into the corresponding input (so that he does not remember for a long time which soap he used during registration, in case he did not save it in the browser).

What are the risks of this decision?

Answer 1

There is only one risk - if you have third-party scripts on your site and they scour localStorage, then they will borrow all the contents of the localstorage to themselves