WebGlossary.info

• The smaller containing block that results when an absolutely‑positioned element is given non‑auto inset values (e.g., top, right, bottom, left, or the inset shorthand). These inset values shrink the element’s original containing block, creating a new reference box used for sizing and positioning, as with CSS Anchor Positioning features such as position‑area and position‑try‑order.

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