55 lines
1.4 KiB
TypeScript
55 lines
1.4 KiB
TypeScript
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/**
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* Format a number for display with proper precision
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*/
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export function formatNumber(
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value: number,
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options: {
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maxDecimals?: number;
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minDecimals?: number;
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notation?: 'standard' | 'scientific' | 'engineering' | 'compact';
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} = {}
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): string {
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const {
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maxDecimals = 6,
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minDecimals = 0,
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notation = 'standard',
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} = options;
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// Handle edge cases
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if (!isFinite(value)) return value.toString();
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if (value === 0) return '0';
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// Use scientific notation for very large or very small numbers
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const absValue = Math.abs(value);
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const useScientific =
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notation === 'scientific' ||
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(notation === 'standard' && (absValue >= 1e10 || absValue < 1e-6));
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if (useScientific) {
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return value.toExponential(maxDecimals);
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}
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// Format with appropriate decimal places
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const formatted = new Intl.NumberFormat('en-US', {
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minimumFractionDigits: minDecimals,
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maximumFractionDigits: maxDecimals,
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notation: notation === 'compact' ? 'compact' : 'standard',
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}).format(value);
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return formatted;
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}
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/**
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* Parse a number input string
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*/
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export function parseNumberInput(input: string): number | null {
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if (!input || input.trim() === '') return null;
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// Remove spaces and replace comma with dot
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const cleaned = input.replace(/\s/g, '').replace(',', '.');
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const parsed = parseFloat(cleaned);
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return isNaN(parsed) ? null : parsed;
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}
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