import MagicString from 'magic-string';
/**
 * Prefix for this plugin's virtual module ids. Rewritten specifiers carry
 * the `\0` convention directly in the transformed source; Vite's
 * import-analysis resolves them through our `resolveId` and encodes the
 * `\0` for the browser, so it never reaches the network.
 */
export declare const VIRTUAL_PREFIX = "\0lit-plugin:";
/** Virtual module that installs the define interceptor. */
export declare const INSTALL_ID = "\0lit-plugin:install";
/**
 * A module needs the define interceptor + self-accept if it registers
 * custom elements: a textual `customElements.define(` call, or — only when
 * a lit-family import is present — a `customElement(` decorator call (the
 * decorator runtime call stays textually present after TS transpilation).
 */
export declare const isComponentModule: (code: string, hasLitFamilyImport: boolean) => boolean;
export interface LitPluginTransformResult {
    code: string;
    map: ReturnType<MagicString['generateMap']>;
}
/**
 * The whole dev transform, as a pure function of the module source:
 *
 * - Pass 1 (all user modules — shared template-partial modules must intern
 *   too): rewrite import/export-from/dynamic-import specifiers found in the
 *   wrap table to their `\0lit-plugin:` wrapper module.
 * - Pass 2 (component modules): prepend the interceptor install import
 *   (static imports hoist, so the interceptor is installed before this
 *   module's defines) and append a self-accept (re-execution alone triggers
 *   the define interceptor — no hotUpdate hook needed).
 *
 * Returns `null` when the module needs no changes.
 */
export declare const transformLitModule: (code: string) => Promise<LitPluginTransformResult | null>;
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