In CSS, you may encounter an ampersand (&) character placed before a pseudo-element selector. This usage is not part of standard CSS but is commonly seen in preprocessing languages like LESS.
In LESS, the ampersand serves as a nesting operator, allowing you to select nested elements more concisely. It represents the parent selector and can be used to chain multiple selectors.
Consider this LESS syntax:
.clearfix { &:before, &:after { display: table; content: ""; } &:after { clear: both; } }
Here, the ampersands before :before and :after indicate that these pseudo-elements are nested within .clearfix. This syntax will compile to the following CSS:
.clearfix:before, .clearfix:after { display: table; content: ""; } .clearfix:after { clear: both; }
For instance, the following LESS code:
.example { &:hover { color: red; } }
Will compile to:
.example:hover { color: red; }
The above is the detailed content of Here are a few title options, combining question format with the article\'s focus on LESS & ampersands: * Why do I see an ampersand (&) in LESS pseudo-element selectors? * What does the amper. For more information, please follow other related articles on the PHP Chinese website!