allow empty string in regex code example

Example 1: regex to check non empty string

/^(?!\s*$).+/

Example 2: regex is not empty string

const REGEXP = /^$/;

const validate = (text) => {
    return REGEXP.test(text);
}

const isNotEmpty = validate("x");
const isEmpty = validate("");

console.log(isNotEmpty); //false
console.log(isEmpty); //true