# HtmlSparsePartChunk

A chunk representing a sparse part (mixed static/dynamic text).

## Signatures

```ts
export interface HtmlSparsePartChunk {
    readonly _tag: "sparse-part";
    readonly node: Template.SparsePartNode;
    readonly render: (value: unknown) => string;
}
```

## Why

Sparse values preserve surrounding literal text while serializing each
interpolation according to its HTML context.

## Ownership and lifetime

The record owns no subscription; the consuming renderer evaluates it.

## Property: _tag

Identifies a sparse dynamic chunk.

## Property: _tag: Why

Enables exhaustive renderer dispatch.

## Property: _tag: Ownership and lifetime

Immutable metadata owned by the chunk.

## Property: node

The parsed sparse part retaining literal/dynamic ordering.

## Property: node: Why

Preserves the serialization context across all segments.

## Property: node: Ownership and lifetime

The chunk borrows the immutable AST node.

## Property: render

Function to render the value of this part into a string.

## Property: render: Why

Sparse parts retain one context-aware escaping boundary.

## Property: render: Ownership and lifetime

The pure function retains no application value between calls.

## Examples

```ts
import { templateToHtmlChunks, type HtmlSparsePartChunk } from "@typed/template/HtmlChunk"
import { parse } from "@typed/template/Parser"

const chunk = templateToHtmlChunks(parse(["<p title=\"before ", " after\"></p>"]))[1] as HtmlSparsePartChunk
```