regular expression for null or empty string javascript code example

Example 1: javascript regex check if string is empty

function IsEmptyOrWhiteSpace(str) {
    return (str.match(/^\s*$/) || []).length > 0;
}

Example 2: regex is empty string javascript

const REGEXP = /^$/;

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

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

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