propertyIsEnumerable < Object < JavaScript

The propertyIsEnumerable() method of the Object checks if the given property is enumerable and is the object's own property.

    
    const account = { amount: 100 }
    const numbers = [42];

    console.log(account.propertyIsEnumerable('amount'));
    // true

    console.log(numbers.propertyIsEnumerable(0));
    // true

    console.log(numbers.propertyIsEnumerable('length'));
    // false