It might be better to use an iframe for this, but you should not need to use a full URL - a relative URL should work fine. Also don't use the file:// scheme at all, modern Cordova exports use custom URL schemes (e.g. app:// on iOS) which make things like this work much more easily.
Suppose I create an xcode project with a construct3.
This project has a "www" folder, Where there is an "index.html" file.
Now I want to have another html file to go to it, during the game.
Well, I can not put the second html game in the main "www" folder because its contents may interfere with the contents of the previous file. So, I create another folder in the "www" folder and name it, for example: "second".
Now inside the game, I put a browser object and where necessary, I call the "go to url" action. Now my question is what address should I enter in the url field? Is this true according to what you said?
"app: //www/second/index2.html"
(Note: I want to use the browser object, not the iframe object. Because I tried iframe. There were problems. For example, only a black screen appeared and another problems)