import { AfterViewInit, ElementRef, OnChanges, Renderer2 } from '@angular/core';
import * as i0 from "@angular/core";
export declare class NcOptionHighlightDirective implements OnChanges, AfterViewInit {
    private elementRef;
    private renderer;
    private label;
    term: string;
    constructor(elementRef: ElementRef, renderer: Renderer2);
    ngOnChanges(): void;
    ngAfterViewInit(): void;
    private get element();
    private escapeRegExp;
    private highlightLabel;
    private get canHighlight();
    private setInnerHtml;
    private isDefined;
    static ɵfac: i0.ɵɵFactoryDeclaration<NcOptionHighlightDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<NcOptionHighlightDirective, "[ncOptionHighlight]", never, { "term": "ncOptionHighlight"; }, {}, never>;
}