Chaining Selectors
When writing CSS rules, it's possible to require an HTML element to have two or more CSS selectors at the same time.
This is done by combining multiple selectors, which we will refer to as chaining. For instance, if there was a .special class for h1 elements, the CSS would look like this:
h1.special {}
The code above would select only the h1 elements that have a class of special. If a p element also had a class of special, the rule in the example would not style the paragraph.
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