How to modify the style of UI kit

[Mockplus]

How to modify the style of UI kit ？

or

When I use custom UI, how do I store data, just like the storage method of UI kit.

[Nic Brough -Adaptavist-]

Could you explain what you are trying to do here?  If you're talking about changing the Cloud Jira UI, you're not going to get very far with it, you don't get to change the software.

[Mockplus]

Thanks, I have found a way, but another problem appeared again. When I wanted to open a new window, I was rejected, and an error message showed that the request was made in a sandboxed frame whose'allow-popups' permission is not set . What should I do?

[Nic Brough -Adaptavist-]

I have no idea, that's not an Atlassian thing.

[Mockplus]

Thanks