Content Generation

These CSS properties allow you to add automatically generated content (text, symbols, images) before or after HTML elements.
They are mainly used with the pseudo-elements ::before and ::after.

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Main properties

Property	Description
content	Adds generated content into the document (text, icons, images).
counter-increment	Defines the increment step of a CSS counter.
counter-reset	Defines the initial value or resets a CSS counter.
quotes	Defines the characters used for quotation marks (opening/closing).

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Simple example: adding content

p::before {
  content: "→ ";
  color: gray;
}

Result: each paragraph will display an arrow before its text.

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Example with counters

h2 {
  counter-increment: section; /* increments a counter for each h2 */
}

h2::before {
  content: "Section " counter(section) ": ";
}

Result:

• First h2 → “Section 1: …”
• Second h2 → “Section 2: …”

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Example with quotes

q {
  quotes: "«" "»" "‹" "›";
}

q::before {
  content: open-quote;
}

q::after {
  content: close-quote;
}

Résult : a <q>element will automatically be displayed with French quotation marks (« … »).

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Key takeaways

• content is used with ::before and ::after to insert generated content.
• counter-reset initializes a counter, and counter-increment increases it.
• quotes allows defining custom quotation marks.
• These properties are useful for automatic numbering, adding icons, or customizing quotations.