25 lines
807 B
TypeScript
25 lines
807 B
TypeScript
// THE compact-number formatter — every user-facing count/token figure goes
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// through here. 999 → "999", 1000 → "1k", 1230 → "1.2k", 10000 → "10k",
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// 1_500_000 → "1.5M". Do not hand-roll `/ 1000` display math elsewhere.
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export function compactNumber(value: null | number | undefined): string {
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const num = Number(value ?? 0)
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if (!Number.isFinite(num) || num <= 0) {
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return '0'
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}
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const scaled = (v: number, suffix: string) => `${v.toFixed(1).replace(/\.0$/, '')}${suffix}`
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// Thresholds sit just under the unit boundary so rounding can't produce
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// "1000k" or "1000" — those promote to the next unit instead.
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if (num >= 999_950) {
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return scaled(num / 1_000_000, 'M')
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}
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if (num >= 999.5) {
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return scaled(num / 1_000, 'k')
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}
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return `${Math.round(num)}`
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}
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