Recently, I came across this code snippet in a CSS file:
#nav { margin: 13px 0 0 0; }
#nav ul li { margin: 0 20px 0 0; }
Is it possible that the second #nav property declaration overrides the first one?
(By the way, am I using the correct term by saying "property definition"? What is the standard terminology for the content within curly brackets?).
The styles are assigned to different elements because they each have unique selectors.
The first style applies to an element with the id "nav", while the second style applies to a li element that is nested within a ul element, which in turn is nested within an element with the id "nav".
To learn more about CSS Selectors, you can visit: https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Getting_started/Selectors
1) Negative. The second selector is specifically targeting the li elements that are children of a ul element, which in turn is a descendant of the #nav element. Whereas, the first selector solely targets the #nav element.
2) Refer to them as "style"
The second explanation doesn't overwrite the first; it simply targets specific elements that are children of the nav element instead of the nav element itself.
In this case, list items (li) within unordered lists inside an element with the ID of nav will be styled according to the second set of rules. The parent element with the ID of nav will follow the initial styling directives. Elements under #nav may also receive some properties through inheritance, like the font-family, without direct specification. However, properties such as margin require explicit declaration with margin: inherit;.
If we had code like this:
#nav { margin: 13px 0 0 0; font-family: Helvetica, Arial, sans-serif;}
#nav ul li { margin: 0 20px 0 0; }
Then list items and other content within nav lacking a defined font-family would adopt a sans-serif font.
The text within curly brackets denotes properties and their respective values. For instance, margin is a property, while the specified margins represent the values. Selectors preceding curly braces target specific elements.
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