itemfor

Itemfor is a term used in computer programming and templating to denote a directive or function that iterates over a collection and renders content for each element. In these contexts, an itemfor directive introduces a loop where a local variable represents the current item in the sequence, allowing templates to access item properties during rendering. The directive is typically used within markup or template languages to produce repeated structures without explicit loop syntax in the host language.

Syntax and scope: In common, albeit nonstandard, implementations, itemfor may appear as an attribute on an element, for example itemfor="item in items". The block’s inner content is evaluated for each item, with item bound to the current element. Some variants also expose the index or a key for optimization and stable re-rendering, enabling scenarios such as alternating styles or keyed updates in dynamic interfaces.

Examples: A simple usage might render a list of names by repeating a list item for each element in items, binding item.name within the template. Another variant could expose an index, allowing alternate styling based on position, such as applying a different class for even versus odd items.

Relation and usage: Itemfor is related to broader concepts of for-each loops and template directives. It is described as a lightweight, language-agnostic pattern used in various templating systems to separate data traversal from presentation logic. As a term, itemfor does not refer to a single standardized language, but to a generic approach to item-level iteration in templates.