react-epoch-picker/src/utils/isNumber.js

A React UI component for choosing an date epoch, starting zoomed out at millenniums and going down through the centuries, decades and years.

/**
 * checks if a given value is a number
 *
 * @param {number} num
 */
export default function isNumber(num) {
    return typeof num === "number" && !isNaN(num) && num !== Math.abs(Infinity);
}