import { type RootElementType } from './types.js';
export declare const isObject: (o: unknown) => boolean;
/**
 * Round off the last decimal place
 * @param num input for fixed
 * @param precision We keep how many places behind the decimal point
 */
export declare const toFixed: (num: number, precision: number) => number;
/**
 * The properties that should not change from px to rem Values need to be exact matches.
 * @param prop The declaration's property name. e.g. margin, font-size, ...
 * @param blackList Values need to be exact matches.
 * @returns true indicates should not change unit; otherwise enabled current convert loop.
 */
export declare const blacklistedProp: (prop: string, blackList?: Array<string | RegExp>) => boolean;
/**
 * The properties that can change from px to rem
 * Default is an empty array that means disable the white list and enable all properties.
 * @param prop The declaration's property name. e.g. margin, font-size, ...
 * @param whiteList Values need to be exact matches.
 * @returns true indicates enabled all properties. otherwise false.
 */
export declare const passedWhiteListProp: (prop: string, whiteList?: Array<string | RegExp>) => boolean;
/**
 * The selectors to ignore and leave as px
 * @example
 * If value is string, it checks to see if selector contains the string.
 *   ['body'] will match .body-class
 * If value is regexp, it checks to see if the selector matches the regexp.
 *   [/^body$/] will match body but not .body
 * @param selector
 * @param selectorBlackList  The selectors to ignore and leave as px
 * @returns true indicates should not change unit; otherwise enabled current convert loop.
 */
export declare const blacklistedSelector: (selector: string, selectorBlackList?: Array<string | RegExp>) => boolean;
/**
 * @example
 * const input = 'h1 { margin: 0 0 00.5px 16px; border-width: 001px; font-size: 32px; font-family: "16px"; }';
 * const output = 'h1 { margin: 0 0 .5px 0.16rem; border-width: 1px; font-size: 0.32rem; font-family: "16px"; }';
 * @param identifier single property will be ignored
 * @param unit 'px' or 'rpx' or 'px|rpx'
 */
export declare const handleIgnoreIdentifierRegex: (identifier: string, unit: string) => RegExp;
/**
 * Create an replacer for style decleration value string .
 */
export declare const createPxReplace: (rootValue: RootElementType, unitPrecision: number, minPixelValue: number, unit: string, identifier?: string) => ((...args: string[]) => string);