‌ ZERO WIDTH NON-JOINER UTF-8 character with hex code 200C

Using HEX code of ZERO WIDTH NON-JOINER in HTML file

<span> &#x200C; </span>

Using Decimal code of ZERO WIDTH NON-JOINER in HTML file

<span> &#8204; </span>

Using HEX code of ZERO WIDTH NON-JOINER in CSS file for content

span { 
    content: '\200c';
}