How to prevent zooming the site with your fingers on smartphones like mob. vk version?

Question

Mobile development

<meta name="viewport" content="user-scalable=no">
This option doesn't work.

Answer 1

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

or

<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">