@lvlte/modf/dist/index.js

Get the integral and fractional parts of a given number.

export function modf(x, literal = false) {
    if (!Number.isFinite(x)) {
        return [NaN, NaN];
    }
    const sign = Math.sign(x);
    const ipart = Math.trunc(x);
    let fpart;
    if (ipart === x) {
        fpart = sign * 0;
    }
    else if (ipart === 0) {
        fpart = x;
    }
    else if (literal) {
        const decimals = x.toString().split('.')[1];
        fpart = sign * Number(`0.${decimals}`);
    }
    else {
        fpart = x - ipart;
    }
    return [ipart, fpart];
}
export const ipart = (x) => {
    if (Number.isFinite(x)) {
        return Math.trunc(x);
    }
    return NaN;
};
export const fpart = (x, literal = false) => {
    if (literal) {
        return modf(x, true)[1];
    }
    return Number.isFinite(x) ? x % 1 : NaN;
};