selector css if there's another sibling code example
Example 1: adjacent sibling selector
/*The adjacent sibling combinator (+) separates two
selectors and matches the second element only if
it immediately follows the first element, and
both are children of the same parent element.*/
li:first-of-type + li {
color: red;
}
<ul>
<li>One</li> // The sibling
<li>Two</li> // This adjacent sibling will be red
<li>Three</li>
</ul>
Example 2: css selector for sibling element
/* Paragraphs that come immediately after any image */
img + p {
font-weight: bold;
}