css disable zoom on page code example

Example 1: how to disable zoom in html page on different screen resolutions

<meta name="viewport" content="width=device-width, user-scalable=no">

Example 2: prevent webpage zooming in mobile

<meta 
     name='viewport' 
     content='width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0' 
/>