How to keep straight with ionicV3

I want my screen keep straight Even if the device is landscape.
Someone can tell me how to solve this problem.

You need to make an addition to the Cordova config.xml file

<preference name="Orientation" value="portrait" />

thanks you,
this answer is useful to me.

Ask again
If I want page A to be straight and horizontal, and page B will always stay straight, can I do this?

I’m not sure if you can do that on the fly yet, but I’ll keep looking