EN
JavaScript - check if string is empty / null / undefined
0
points
In this article, we would like to show you how to check if the string is empty / null / undefined in JavaScript.
Quick solution:
// ONLINE-RUNNER:browser;
const myString = '';
if (myString) {
console.log('myString is not empty');
} else {
console.log('myString is empty / null / undefined');
}
If you only want to check if a string is empty use this:
if (myString === '') {
console.log('myString is empty');
} else {
console.log('myString is not empty');
}
Practical example
// ONLINE-RUNNER:browser;
const isEmpty = (string) => {
return string ? false : true;
};
console.log( isEmpty('') ); // true
console.log( isEmpty(null) ); // true
console.log( isEmpty(undefined) ); // true
console.log( isEmpty('sample text') ); // false