import { ElementRef, OnInit, Renderer2, SimpleChanges, OnChanges } from '@angular/core';
export declare class MdbBtnDirective implements OnInit, OnChanges {
    private el;
    private renderer;
    color: string;
    rounded: boolean;
    gradient: string;
    outline: boolean;
    flat: boolean;
    size: string;
    block: boolean;
    floating: boolean;
    simpleChange: string;
    simpleChangeValue: string;
    private colorClass;
    private gradientClass;
    private outlineClass;
    private flatClass;
    private roundedClass;
    private sizeClass;
    private blockClass;
    private floatingClass;
    constructor(el: ElementRef, renderer: Renderer2);
    ngOnInit(): void;
    ngOnChanges(changes: SimpleChanges): void;
    initClasses(): void;
}