::before / ::after
selector
Pseudo-elements that insert virtual elements before or after an element's content.
Syntax
selector::before { content: ""; }
Example
css
/* Required field asterisk */
label.required::after {
content: " *";
color: red;
}
/* Decorative quote */
blockquote::before {
content: '\201C'; /* " */
font-size: 4em;
color: #ccc;
}
/* Clearfix */
.clearfix::after {
content: "";
display: table;
clear: both;
}