/**
 * disappear — removes the host element from the DOM after `ms` milliseconds.
 *
 * Useful for self-dismissing messages, temporary overlays, or any element
 * that should vanish after a delay without any component re-render.
 *
 * The countdown is cancelled automatically if the element is removed from
 * the DOM before the delay elapses (e.g. parent unmounts).
 *
 * If `ms` changes on re-render a fresh countdown is started from the new value.
 *
 * @param ms  Delay in milliseconds before the element is removed.
 *
 * @example
 * // Remove a toast message after 3 seconds
 * html`<div class="toast" ${disappear(3000)}>Saved!</div>`
 *
 * @example
 * // Configurable delay
 * html`<p class="hint" ${disappear(ttl)}>This hint disappears soon.</p>`
 */
export declare const disappear: (nextMs: number) => import("lit-html/directive").DirectiveResult;
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