:after pseudo css code example

Example 1: after element is blocking

.select:after {
    position:absolute;
    bottom:.15em;
    top:.15em;
    right:.5rem;
    content:'\2193';
    pointer-events: none;
}

Example 2: :before css

h2:before { 
    content: "Read: ";
<span class="Apple-converted-space">    color: #F00;</span>
}