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JavaScript - check if string is empty / null / undefined
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In this article, we would like to show you how to check if the string is empty / null / undefined in JavaScript.
Quick solution:
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const myString = '';2
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if (myString) {4
console.log('myString is not empty');5
} else {6
console.log('myString is empty / null / undefined');7
}If you only want to check if a string is empty use this:
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if (myString === '') {2
console.log('myString is empty');3
} else {4
console.log('myString is not empty');5
}
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const isEmpty = (string) => {2
return string ? false : true;3
};4
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console.log( isEmpty('') ); // true6
console.log( isEmpty(null) ); // true7
console.log( isEmpty(undefined) ); // true8
console.log( isEmpty('sample text') ); // false