.with-before::before {
    content: 'ONLY-BEFORE';
}
.with-after::after {
    content: 'ONLY-AFTER';
}
.with-both::before {
    content: 'BOTH-BEFORE';
}
.with-both::after {
    content: 'BOTH-AFTER';
}

#dom-node {
    background-color: white;
    font-family: monospace;
    font-size: 20px;
}