26 lines
632 B
TypeScript
26 lines
632 B
TypeScript
/**
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* PercentDisplay
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*
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* Deterministic formatting for percentages.
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*/
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export class PercentFormatter {
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/**
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* Formats a decimal value as a percentage string.
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* Example: 0.1234 -> "12.3%"
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*/
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static format(value: number | null | undefined): string {
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if (value === null || value === undefined) return '0.0%';
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return `${(value * 100).toFixed(1)}%`;
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}
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/**
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* Formats a whole number as a percentage string.
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* Example: 85 -> "85%"
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*/
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static formatWhole(value: number | null | undefined): string {
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if (value === null || value === undefined) return '0%';
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return `${Math.round(value)}%`;
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}
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}
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