/**
 * @license
 * Copyright 厦门乾元盛世科技有限公司 All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file.
 */
import { ElementRef, Renderer } from '@angular/core';
import { AddonAfter } from './addon.after';
import { AddonBefore } from './addon.before';
/**
 * 在输入框的前后加“拼接”组件<br>
 * 注意：
 * <span class="ant-input-group-addon"></span> 中间不能包含空格、换行等，否则:empty样式不起作用
 */
export declare class Addon {
    private renderer;
    private elementRef;
    /** 样式前缀 */
    prefixCls: string;
    /** 用户CSS样式 */
    class: string;
    addonBefore: AddonBefore;
    addonAfter: AddonAfter;
    constructor(renderer: Renderer, elementRef: ElementRef);
    /** 样式 */
    readonly classes: string;
    /** 样式 */
    getWrapperClasses(): string;
    getAddonClass(): string;
}