How to force site scaling?

Question

css

Please, tell me:
There is a button "Full version of the site" in mobile browsers.
The site is shown on a mobile phone as it would be shown on a desktop, but it is the browser itself that changes the display algorithm to a desktop one.
I need to implement the same button on the site, when viewed on a mobile phone, the ability to switch between mobile and full version.
When switching to the mobile version, everything is fine, I write in the header

<meta name="viewport" content="width=device-width,initial-scale=1.0">

for desktop I write

<meta name="viewport" content="width=980,initial-scale=1">

Everything works, but when switching to the desktop version on a mobile phone, the default scale is original and the user has to manually scale to the desired size. A trifle, but unpleasant. Is there a way to force the site to scale to fit the screen.

Answer 1

Here's an option - https://stackoverflow.com/questions/2341001/merge-...

Answer 2

well, do not remove the viewport, but change it. for example like this:

<meta name="viewport" content="width=980,initial-scale=0.3">