/**
 * <om-widget> — spec: "DOM Model — Shadow vs. Light", "Widget System",
 * "Runtime Context API", "Reactivity — the watch declaration",
 * "Wiring DOM events to emits — two layers".
 *
 * Three tiers, one registry: `type="legend"` etc. resolve against the
 * built-in/registered widget registry; no `type` + a `<script type="om/widget">`
 * child runs as an inline custom widget; no `type` and no script is a purely
 * static widget (Phase 1 behaviour, unchanged).
 */
import { HTMLElementBase } from "../env";
import { type WidgetHost } from "../widget-registry";
import type { RuntimeContext } from "../ctx";
export declare class OmWidgetElement extends HTMLElementBase implements WidgetHost {
    root: ShadowRoot;
    state: Record<string, unknown>;
    /** Set by an inline `<script type="om/widget">` block (`this.watch = [...]`), if present. */
    watch?: string[];
    /** Set by an inline `<script type="om/widget">` block (`this.render = (ctx) => {...}`), if present. */
    render?: (ctx: RuntimeContext) => void | Promise<void>;
    private mapEl;
    private renderFn?;
    private watchTokens;
    private hostStyle;
    /** The registered implementation behind `type="…"` — kept so real removal can call its optional destroy() hook. */
    private impl;
    /** One pending real-removal check at a time — a remove→insert→remove within a single task must not run destroy twice. */
    private destroyCheckPending;
    /** Live placement attributes (spec: "Widget Layout Manager") — position/order edits (incl. undo replays) re-slot without a remount. */
    static readonly observedAttributes: string[];
    connectedCallback(): void;
    disconnectedCallback(): void;
    attributeChangedCallback(name: string): void;
    /**
     * Slot placement (spec: "Widget Layout Manager"). Managed slots: the host
     * is a plain flex item inside the map-owned slot container (flush edges,
     * gap, stacking come from the container — never from the widget). Manual:
     * a plain block the author styles and places, including outside the map.
     * `order` (managed tier) is deterministic in-slot ordering via flex
     * `order`; default is DOM order.
     */
    /** Last-applied tier — hostStyle only rewrites (CSSOM reparse) on an actual manual↔managed flip, not on every replayed identical write. */
    private appliedTier;
    private applyPlacement;
    private setUpRenderer;
    $(selector: string): Element | null;
    $$(selector: string): NodeListOf<Element>;
}