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April 2, 2020 20:04
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A javascript solution to add thousands separator to numbers
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| export const numberWithThousandsSeparator = ( | |
| number, | |
| decimalDigits = 0, | |
| separator = ",", | |
| decimalSeparator = "." | |
| ) => { | |
| let isNegative = false; | |
| if (!number) return number; | |
| if (number >= 0 && number < 1000) | |
| return number.toFixed(decimalDigits).toString(); | |
| if (number < 0) isNegative = true; | |
| number = Math.abs(number); | |
| const [integer, decimals] = number | |
| .toFixed(decimalDigits) | |
| .toString() | |
| .split("."); | |
| let numberArray = integer.split(""); | |
| let numberOfCommas = | |
| numberArray.length % 3 === 0 | |
| ? Math.floor(numberArray.length / 3) - 1 | |
| : Math.floor(numberArray.length / 3); | |
| while (numberOfCommas) { | |
| // This assign the comma from left to right | |
| let position = numberArray.length - 3 * numberOfCommas; | |
| numberArray.splice(position, 0, separator); | |
| numberOfCommas -= 1; | |
| } | |
| return `${isNegative ? "-" : ""}${numberArray.join("")}${ | |
| decimals ? `${decimalSeparator}${decimals}` : "" | |
| }`; | |
| }; |
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