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Format number function

This commit is contained in:
Pabloader 2026-04-11 14:36:32 +00:00
parent c939ab13c5
commit ea55a8fdf4
2 changed files with 33 additions and 2 deletions
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8
src/common/utils.ts
View File

@ -112,11 +112,17 @@ export const callUpdater = <T>(f: StateUpdater<T>, prev: T) =>
typeof f === 'function' ? (f as Function)(prev) : f;
export const formatNumber = (n: number): string => {
if (n === 0) return '0';
if (n < 0) return `-${formatNumber(-n)}`;
if (n >= 1_000_000_000_000) return `${(n / 1_000_000_000_000).toFixed(2)}T`;
if (n >= 1_000_000_000) return `${(n / 1_000_000_000).toFixed(2)}B`;
if (n >= 1_000_000) return `${(n / 1_000_000).toFixed(2)}M`;
if (n >= 1_000) return `${(n / 1_000).toFixed(2)}k`;
return String(n);
if (Math.trunc(n) === n) return n.toString();
if (n >= 1) return n.toFixed(2);
const result = n.toPrecision(2);
if (parseFloat(result) >= 1) return parseFloat(result).toFixed(2);
return result;
};
export const formatTime = (seconds: number): string => {

27
test/common/utils.test.ts
View File

@ -310,12 +310,27 @@ describe('utils', () => {
});
describe('formatNumber', () => {
it('should return small numbers as-is', () => {
it('should return small integer as-is', () => {
expect(formatNumber(0)).toBe('0');
expect(formatNumber(42)).toBe('42');
expect(formatNumber(999)).toBe('999');
});
it('should return small decimals rounded to at most 2 significant digits', () => {
expect(formatNumber(0.1)).toBe('0.10');
expect(formatNumber(0.123)).toBe('0.12');
expect(formatNumber(0.5)).toBe('0.50');
expect(formatNumber(0.999)).toBe('1.00');
expect(formatNumber(0.001)).toBe('0.0010');
expect(formatNumber(0.0001234)).toBe('0.00012');
});
it('should return decimals between 100 and 1000 with 2 decimal places', () => {
expect(formatNumber(100.5)).toBe('100.50');
expect(formatNumber(500.75)).toBe('500.75');
expect(formatNumber(999.9)).toBe('999.90');
});
it('should format thousands with k suffix', () => {
expect(formatNumber(1_000)).toBe('1.00k');
expect(formatNumber(5_500)).toBe('5.50k');
@ -338,6 +353,16 @@ describe('utils', () => {
expect(formatNumber(1_000_000_000_000)).toBe('1.00T');
expect(formatNumber(5_250_000_000_000)).toBe('5.25T');
});
it('should format negative numbers with a leading minus sign', () => {
expect(formatNumber(-42)).toBe('-42');
expect(formatNumber(-0.123)).toBe('-0.12');
expect(formatNumber(-0.999)).toBe('-1.00');
expect(formatNumber(-1_000)).toBe('-1.00k');
expect(formatNumber(-1_000_000)).toBe('-1.00M');
expect(formatNumber(-1_000_000_000)).toBe('-1.00B');
expect(formatNumber(-1_000_000_000_000)).toBe('-1.00T');
});
});
describe('formatTime', () => {