meta content device width code example
Example 1: viewport meta tag
<meta name="viewport" content="width=device-width, initial-scale=1">Example 2: html change viewport to smartphone size
<meta name="viewport" content="width=500, initial-scale=1"><meta name="viewport" content="width=device-width, initial-scale=1"><meta name="viewport" content="width=500, initial-scale=1">