A fashion rule is a certified rule that associates a selector listing with a listing of property declarations and presumably a listing of nested guidelines. They’re additionally referred to as rule units in CSS2.
Because the above quote from W3C signifies, it looks like the W3C considers “rule set” to be a little bit of an outdated time period, preferring the time period “fashion rule” (or presumably “rule” for brief).
I by no means observed that! “Rule set” is so gosh darned branded on my mind that it’s gonan take shedding numerous muscle reminiscence to start out utilizing “fashion rule” as an alternative. I didn’t see a particular observe within the spec’s Adjustments part, however you possibly can see the change within the desk of contents between variations:
Louis properly sums up the elements of a mode rule as effectively:
/* The whole lot beneath is a mode rule (or rule set, or simply rule) */
part { /* The whole lot between the braces is a declaration block */
margin: 0 20px; /* This line is a person declaration */
colour: #888; /* One other declaration */
}I do know nothing of the context and, at first, I used to be gonna poo-poo the change, however “fashion rule” actually is sensible the extra I sit with it. If the property:worth pairs are declarations that sit in a declaration block, then we’ve received one thing much less like a algorithm and extra like one rule that defines the kinds for a selector with a block of favor declarations. 👌
As soon as once more, naming issues is tough.
