import type { Attribute, ClassMember, ClassMethod, CssCustomProperty, CssPart, CustomElement, CustomElementExport, CustomElementField, Event, Package, Slot } from 'custom-elements-manifest/schema';
type ClassField = CustomElementField & {
    /**
     * Whether the property is read-only.
     */
    readonly?: boolean;
};
export type { Attribute, ClassField, ClassMember, ClassMethod, CssCustomProperty, CssPart, CustomElement, Event, Package, Slot };
export declare function hasCustomElements(manifest?: Package | null): manifest is Package;
export declare function fetchManifest(src: string): Promise<Package | null>;
export declare function getCustomElements(manifest: Package, only?: string[]): CustomElementExport[];
export declare const getElementData: (manifest: Package, elements: CustomElementExport[], selected?: string) => CustomElement | null;
export declare const getPublicFields: (members?: ClassMember[]) => ClassField[];
export declare const getPublicMethods: (members?: ClassMember[]) => ClassMethod[];
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