import { PopupModal } from './types';
/**
 * Whether a form limited to `urls` may appear on `href`.
 *
 * An empty or missing list means every page, so a form that says nothing about
 * addresses runs wherever it's added — which is what every form authored before
 * this existed says, and what a form embedded by pasting a tag exactly where it
 * belongs wants anyway.
 */
export declare function matchesUrls(urls: string[] | undefined, href: string): boolean;
/** Whether `popup` may appear on `href`. */
export declare function matchesPage(popup: PopupModal, href: string): boolean;
/** Whether a form limits itself to particular addresses at all. */
export declare function hasUrlTargeting(popup: PopupModal): boolean;
/**
 * An address as the author meant it: `poptin.com/thanks` becomes
 * `https://poptin.com/thanks`, while `ThankYou.aspx`, `/thanks`, `./thanks`,
 * `?done=1` and anything already carrying a scheme are handed back untouched.
 *
 * Applied in two places, because a broken destination has two lives. The editor
 * repairs it as the author leaves the field, so the value that gets *stored* is
 * the one that works; the renderer repairs it again at the moment it navigates,
 * so a form saved before any of this existed reaches the right site without
 * anyone reopening it. `validateSuccess` still warns about the stored value, so
 * the author can see and fix what their JSON actually says.
 */
export declare function withScheme(value: string): string;