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

}