es-toolkit
Version:
A state-of-the-art, high-performance JavaScript utility library with a small bundle size and strong type annotations.
20 lines (18 loc) • 721 B
JavaScript
function decimalAdjust(type, number, precision = 0) {
number = Number(number);
if (Object.is(number, -0)) {
number = '-0';
}
precision = Math.min(Number.parseInt(precision, 10), 292);
if (precision) {
const [magnitude, exponent = 0] = number.toString().split('e');
let adjustedValue = Math[type](Number(`${magnitude}e${Number(exponent) + precision}`));
if (Object.is(adjustedValue, -0)) {
adjustedValue = '-0';
}
const [newMagnitude, newExponent = 0] = adjustedValue.toString().split('e');
return Number(`${newMagnitude}e${Number(newExponent) - precision}`);
}
return Math[type](Number(number));
}
export { decimalAdjust };