error Unexpected trailing comma comma-dangle

The error "Unexpected trailing comma comma-dangle" occurs when there is a comma at the end of an array or object declaration, indicating that there is another element or property following it. This is not allowed in JavaScript and can cause syntax errors.

For example, the following code would result in this error:

const myArray = [1, 2, 3,];

To fix this error, simply remove the trailing comma:

const myArray = [1, 2, 3];

Similarly, the error can occur in object declarations as well:

const myObject = {
  property1: 'value1',
  property2: 'value2',
};

To fix it, remove the trailing comma:

const myObject = {
  property1: 'value1',
  property2: 'value2'
};
``