@technobuddha/library/isNumeric/isNumeric.ts

A large library of useful functions

import isNumber     from 'lodash/isNumber';
import isNaN        from 'lodash/isNaN';
import isString     from 'lodash/isString';
import toNumber     from 'lodash/toNumber';
import isWhitespace from '../isWhitespace';

/**
 * Test an object to see if it a number, or a string which can be converted into a number
 *
 * @param input the object to test
 * @returns true, if the object is a number, or can be converted to a number
 */
export function isNumeric(input: unknown): input is (number | string) {
    return (isNumber(input) && !isNaN(input)) || (isString(input) && input.length > 0 && !isWhitespace(input) && !isNaN(toNumber(input)));
}

export default isNumeric;