import type { ChartNumberFormat } from '../types.js';
/**
 * Build a value formatter for chart axes, data labels and tooltips. Wraps
 * `Intl.NumberFormat` with locale, decimals, notation and adds optional
 * prefix/suffix (currency symbol, units).
 */
export declare function createNumberFormatter(format: ChartNumberFormat | undefined): (value: number) => string;
/**
 * Build a percentage formatter for pie/donut data labels. ApexCharts feeds
 * those formatters the slice share (0-100), not the raw value, so currency
 * prefix/suffix and notation don't apply — only locale and decimals do.
 */
export declare function createPercentFormatter(format: ChartNumberFormat | undefined): (value: number) => string;