A selector list is a comma-separated list of selectors that share the same style rule.
A selector list consists of multiple selectors separated by commas:
selector1, selector2 {...}
The following two USS snippets have the same effect.
# container2 {
background-color: pink;
border-radius: 10px;
}
Button {
background-color: pink;
border-radius: 10px;
}
# container2, Button {
background-color: pink;
border-radius: 10px;
}