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Lodash _.isError

Overview

The lodash _.isError method is a utility function that checks whether a given value is an error object. An error object is an object created by the Error constructor or a subclass of Error. This method returns true if the provided value is an error object, otherwise returns false.

The syntax for using this method is straightforward. You can call it with a single argument, which is the value to be checked. The method returns a boolean indicating whether the value is an error object or not.

Here's an example of using the _.isError method:

const lodash = require('lodash');

const myError = new Error('This is an error!');
console.log(lodash.isError(myError)); // Output: true

const myObject = { message: 'Not an error' };
console.log(lodash.isError(myObject)); // Output: false

In the example above, we first create an error object using the Error constructor. Then, we pass it to the _.isError method. As expected, the method returns true since the provided value is an error object. In the second call of _.isError method, we pass an ordinary object instead of an error object, causing it to return false.

In summary, the _.isError method is a useful utility function for checking whether a given value is an error object or not. If it is an error object, this can be used to determine if additional error-handling logic needs to be executed.