i18n-js
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A small library to provide I18n on JavaScript.
61 lines • 2.48 kB
JavaScript
import { BigNumber } from "bignumber.js";
import repeat from "lodash/repeat";
import { roundNumber } from "./roundNumber";
function replaceInFormat(format, { formattedNumber, unit }) {
return format.replace("%n", formattedNumber).replace("%u", unit);
}
function computeSignificand({ significand, whole, precision, }) {
if (whole === "0" || precision === null) {
return significand;
}
const limit = Math.max(0, precision - whole.length);
return (significand !== null && significand !== void 0 ? significand : "").substr(0, limit);
}
export function formatNumber(input, options) {
var _a, _b, _c;
const originalNumber = new BigNumber(input);
if (options.raise && !originalNumber.isFinite()) {
throw new Error(`"${input}" is not a valid numeric value`);
}
const roundedNumber = roundNumber(originalNumber, options);
const numeric = new BigNumber(roundedNumber);
const isNegative = numeric.lt(0);
const isZero = numeric.isZero();
let [whole, significand] = roundedNumber.split(".");
const buffer = [];
let formattedNumber;
const positiveFormat = (_a = options.format) !== null && _a !== void 0 ? _a : "%n";
const negativeFormat = (_b = options.negativeFormat) !== null && _b !== void 0 ? _b : `-${positiveFormat}`;
const format = isNegative && !isZero ? negativeFormat : positiveFormat;
whole = whole.replace("-", "");
while (whole.length > 0) {
buffer.unshift(whole.substr(Math.max(0, whole.length - 3), 3));
whole = whole.substr(0, whole.length - 3);
}
whole = buffer.join("");
formattedNumber = buffer.join(options.delimiter);
if (options.significant) {
significand = computeSignificand({
whole,
significand,
precision: options.precision,
});
}
else {
significand = significand !== null && significand !== void 0 ? significand : repeat("0", (_c = options.precision) !== null && _c !== void 0 ? _c : 0);
}
if (options.stripInsignificantZeros && significand) {
significand = significand.replace(/0+$/, "");
}
if (originalNumber.isNaN()) {
formattedNumber = input.toString();
}
if (significand && originalNumber.isFinite()) {
formattedNumber += (options.separator || ".") + significand;
}
return replaceInFormat(format, {
formattedNumber,
unit: options.unit,
});
}
//# sourceMappingURL=formatNumber.js.map