import { DoCheck, ElementRef, KeyValueDiffers, Renderer2 } from '@angular/core';
/**
 * Binds CSS variable.
 *
 * ### Usage
 *
 * ```html
 * <div [kitCssVar]="{myBg: red}:"></div>
 * ```
 *
 * Use variable in styles:
 *
 * ```css
 * div {
 *   background: var(--myBg);
 * }
 * ```
 */
export declare class KitCssVarDirective implements DoCheck {
    private differs;
    private elRef;
    private renderer;
    private _cssVar;
    private differ;
    constructor(differs: KeyValueDiffers, elRef: ElementRef, renderer: Renderer2);
    ngDoCheck(): void;
    kitCssVar: {
        [key: string]: string;
    };
    private applyChanges;
    private remove;
    private set;
}