import { SingleCssVarDefinition } from './define-css-vars.js';
/**
 * Set the given CSS var to the given value on the given element. Allows numeric values but converts
 * them to strings (since the style.setProperty API only allows strings).
 *
 * @category Main
 */
export declare function setCssVarValue({ onElement, toValue, forCssVar, }: {
    onElement: HTMLElement;
    toValue: string | number;
    forCssVar: SingleCssVarDefinition;
}): void;
/**
 * Set the given property's value to the given CSS var on the given element, using
 * "element.style.setProperty".
 *
 * @category Main
 */
export declare function applyCssVar({ onElement, forProperty, toCssVar, }: {
    onElement: HTMLElement;
    forProperty: string;
    toCssVar: SingleCssVarDefinition;
}): void;
/**
 * Read the given CSS var's value on the given element. If "includeCascade" is set to true, the
 * given elements styles are computed to retrieve cascaded CSS var values. If "includeCascade" is
 * false, the CSS var is read directly off the element, which will only read values from the element
 * on which the CSS var was directly set.
 *
 * WARNING: "includeCascade: true" is less performant because it runs "globalThis.getComputedStyle".
 * However, in practice I've yet to actually see this be an issue (unless you're running this in an
 * immediate infinite loop but of course don't do that).
 *
 * @category Main
 */
export declare function readCssVarValue({ onElement, forCssVar, includeCascade, }: {
    onElement: HTMLElement;
    forCssVar: SingleCssVarDefinition;
    includeCascade?: boolean;
}): string;