/**
 * Class for storing CSS property registrations. An instance is automatically constructed at
 * {@link cssPropertyRegistry}.
 *
 * @category Internal
 */
export declare class CssPropertyRegistry {
    static readonly cssPropertyDefinitionSupported: boolean;
    readonly registry: Map<string, PropertyDefinition>;
    constructor();
    /**
     * Detects if the name can be registered. Also checks if `globalThis.CSS.registerProperty` is
     * supported at all.
     */
    canRegisterCssProperty(name: string): boolean;
    /**
     * Register a property only if registration is supported and if the CSS var has not already been
     * registered.
     *
     * @returns `true` if the definition was registered, `false` otherwise.
     */
    registerProperty(definition: Readonly<PropertyDefinition>): boolean;
}
/**
 * An instance of {@link CssPropertyRegistry}.
 *
 * @category Internal
 */
export declare const cssPropertyRegistry: CssPropertyRegistry;