Validation
Check for number
Checks if string contains a number, returns boolean. via
function hasNumber(myString) {
return /\d/.test(myString);
}
Check for string
Check variable for any text / characters (a-z) that aren't numbers. (e.g. checks if const a = '1px'
contains px). via
const str = "1px";
if (/[a-z]/i.test(str)) {
// alphabet letters found
}