Dot in CSS: One or Two? When Does it Matter?

Deciphering the Dot in CSS

In CSS, the dot notation holds significant meaning, as it acts as a key component in defining selector specificity and identifying element classes. Two variations of class selectors arise based on the presence of an extra dot:

With an Extra Dot (.)

A class selector starting with a dot represents an element of that particular class. For instance, .work-container .h3 targets elements with the class name "h3" that are descendants of elements with the class name "work-container."

Without the Extra Dot

In contrast, when two dotted selectors are adjacent without a space, as in .work-container h3, it signifies that the element should have both "work-container" and "h3" classes simultaneously. This is equivalent to assigning the "work-container h3" class in HTML.

Related Considerations

• Class Namespace: When using dots, it's recommended to prefix class names with a namespace (e.g., company-name.class-name) to avoid conflicts.
• Specificity: The extra dot increases the selector's specificity, making it more likely to override conflicting styles.
• Avoid Redundancy: Use only one dot when targeting elements of a single class.

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