JSFiddle - React, Tailwind, and code Playground

JavaScript

function ValidateNumber(strNumber) {
    var regExp = new RegExp("^\\d+$");
    var isValid = regExp.test(strNumber);
    return isValid;
}
["010099914934", "foo", "8282 888"].forEach(function(str) {
    console.log(ValidateNumber(str));
});