Phone adaptability not working?

Question

css

I'm using the "[email protected]" class in uikit. Everything works, if you do not include "toggle device toolbar" in Google (it is in the upper left corner in chrome when viewing the element code). It also doesn't work on the phone. How to decide?

Answer 1

Viewport set?

<meta name="viewport" content="width=device-width, initial-scale=1">

Answer 2