sectom/functions/onlyNumericalString.js

Sectom is a useful npm package that has multiple easy to use functions.

/**
 * Removes all non numerical characters from a string
 * @example
 * onlyNumericalString('123abc') //123
 *
 * @param {string} input
 * @returns
 */
function onlyNumericalString(input) {
  if (typeof input !== "string")
    throw new TypeError("the input must be a string!");
  let myString = input;
  myString = myString.replace(/\D/g, "");

  return myString;
}

exports.onlyNumericalString = onlyNumericalString;