What is the syntax of a pseudo-element?

Difficulty: 3/10

pseudo-element syntax, CSS selector specificity, before/after usage

Syntax of Pseudo-Elements in CSS

A pseudo-element in CSS is used to style a specific part of an element or insert content before or after it. The standard syntax uses double colons :: followed by the pseudo-element name.

Key Points

1
Syntax format: selector::pseudo-element { properties }
2
Common pseudo-elements include ::before, ::after, ::first-letter, and ::first-line.
3
Single colon notation (e.g., ) is also supported for backward compatibility with older browsers.

Example: Using ::before and ::first-letter

In this example, ::first-letter targets and styles the first letter of the paragraph, while ::before inserts a star before the paragraph text.

Best Practices

1
Use pseudo-elements to style or decorate content without modifying the HTML structure.
2
Combine with CSS properties like content, color, font-size, and background.
3
Prefer double colon :: notation for clarity and modern standards.

Scenario Questions

0-2 years experience

Follow-up Questions