@material-ui/popper.js/src/utils/isNumeric.js

A fork of popper.js to avoid the deprecation warnings: https://github.com/mui-org/material-ui/issues/19358.

/**
 * Tells if a given input is a number
 * @method
 * @memberof Popper.Utils
 * @param {*} input to check
 * @return {Boolean}
 */
export default function isNumeric(n) {
  return n !== '' && !isNaN(parseFloat(n)) && isFinite(n);
}