What technique is used to indicate an item from a popup menu that disappears on click?

The technique used to indicate an item from a popup menu that disappears on click is known as delayed selection. This method typically requires the user to engage with the menu for a short period before it registers the selection, allowing for a smoother interaction where the menu remains visible until the user completes their choice.

In the context of user interface design, a delayed selection can help prevent accidental clicks, ensuring that users make intentional choices with menu items. This function is particularly useful in instances where a popup menu might close prematurely due to quick or inadvertent movements of the cursor, allowing the user some time to finalize their selection without the menu disappearing.

Other techniques like instant selection would imply that the selection is registered as soon as the item is engaged, which could lead to confusion if users accidentally hover over items. Static selection refers to a fixed choice without interaction dynamics, and dynamic selection suggests an evolving choice mechanism, which does not align with the context of a disappearing popup menu. Thus, delayed selection is the most fitting and effective approach for this specific scenario.