Check whether object is empty in JavaScript

JS objects have a method to get all the keys in the object.

const author = {
  firstName: 'Param',
  lastName: 'Harrison'
};

console.log(Object.keys(author)); // Output - ["firstName", "lastName"]

To check whether the object is empty or not, you can check the number of keys.

if (Object.keys(author).length === 0) {
  console.log('Author object is empty');
} else {
  console.log('Author object is not empty');
}

Since we have the keys, it will show Author object is not empty in the console output.

Now, remove the keys in the object and check,

const author = {};

console.log(Object.keys(author)); // Output - []

It will display Author object is empty in the console.

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