Utilizing error objects

When a runtime error occurs, a new Error object is created and thrown. With this Error object, we can determine the type of the Error and handle it according to its type.

Types of Errors:

Besides error constructors, Javascript also has other core Error constructors.

• AggregateError
• EvalError
• InternalError
• RangeError
• ReferenceError
• SyntaxError

Example

try {
  willGiveErrorSometime();
} catch (error) {
  if (error instanceof RangeError) {
    rangeErrorHandler(error);
  } else if (error instanceof ReferenceError) {
    referenceErrorHandle(error);
  } else {
    errorHandler(error);
  }
}

Visit the following resources to learn more:

• Error Object - MDN
• Control flow & Error handling - MDN