In the shown example, all list items will be followed by a check mark (✓). Then the CSS CLASS looks like this:

LI::after {
    content: " ✓";
}


The code for the example looks like this:

<B>List:</B>
<UL>
<LI>Item 1</LI>
<LI>Item 2</LI>
<LI>Item 3</LI>
<LI>Item 4</LI>
<LI>Item 5</LI>
<LI>Item 6</LI>
</UL>


On the screen, it looks like this:

List: