Cocos creator webview customizing

I just want to customize webview.
In cocos creator, I can use webview, but I just can set url to use the webview in.
I want to set html content by myself, but not use url or local html file.
Anyone can help me on this problem?

I don’t really know if I’m understanding you.
Do you want to set html content on the webview or on the document where the game is?
What do you mean by ‘customize webview’?