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34 lines
1.1 KiB
TypeScript
34 lines
1.1 KiB
TypeScript
// Refactored from
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// https://stackoverflow.com/questions/2685911/is-there-a-way-to-round-numbers-into-a-reader-friendly-format-e-g-1-1k
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const abbreviations = ['k', 'm', 'b', 't'];
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export function abbreviateNumber(number: number, decimals: number = 2): string {
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let result = String(number);
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const d = Math.pow(10, decimals);
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// Go through the array backwards, so we do the largest first
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for (let i = abbreviations.length - 1; i >= 0; i--) {
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// Convert array index to "1000", "1000000", etc
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const size = Math.pow(10, (i + 1) * 3);
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// If the number is bigger or equal do the abbreviation
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if (size <= number) {
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// Here, we multiply by decimals, round, and then divide by decimals.
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// This gives us nice rounding to a particular decimal place.
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let n = Math.round((number * d) / size) / d;
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// Handle special case where we round up to the next abbreviation
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if (n === 1000 && i < abbreviations.length - 1) {
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n = 1;
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i++;
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}
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result = String(n) + abbreviations[i];
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break;
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}
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}
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return result;
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}
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