How to write ::before / ::after inside anchor tag

Question

How to write ::before inside anchor tag like this.

Answer 1

What you see here is a CSS pseudo-element.

::before pseudo-element can be used to insert some content before the content of an element. eg - the following code will insert This comes before... before every paragraph.

p::before {
  content: "This comes before...";
}

<p>This is a paragraph</p>
<p>This is another paragraph</p>

For more information on CSS pseudo-elements, refer to this link.