/**
 * Applying a part contract to a real element.
 *
 * A projection decides what a control exposes — classes, id, role, ARIA state — and this writes that
 * decision to the DOM. Consuming the whole contract is what keeps every renderer of a kind
 * semantically identical: an attribute added to a projection reaches the DOM without any renderer
 * being edited, and no renderer can expose a different subset of a widget's states.
 */
import type { MdyPartContract } from "./contract.js";
/**
 * Applies an {@link MdyPartContract} — classes, styles, id, role, attributes — to an element,
 * replacing only what the contract controls on each call.
 *
 * Safe to re-run on every state change: it patches the same element rather than replacing it, so
 * focus and caret position survive.
 *
 * Only the classes the contract names are touched. An element's classes come from more than one
 * place — written once at creation, toggled by a host binding on every change — and rewriting the
 * whole attribute would drop the ones this does not own, silently and without breaking rendering.
 * A contract naming no classes therefore leaves `class` untouched.
 */
export declare function applyPart(node: HTMLElement, part: MdyPartContract): void;