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Lodash _.isPlainObject

Overview

The lodash _.isPlainObject method is a utility function that allows you to check if a given value is a plain object. A plain object is an object that isn't created by a constructor function, has no prototype or has a prototype that is a plain object prototype, and has an object literal curly braces notation.

This method returns true if the value is a plain object, and false otherwise.

One important thing to note when using _.isPlainObject is that it's different from the typeof operator, which will return "object" for any value that is an object.

Here's an example of how to use _.isPlainObject:

const _ = require('lodash');

_.isPlainObject({}); // true

_.isPlainObject(new Object()); // true

class Person { }
_.isPlainObject(new Person()); // false

_.isPlainObject([]); // false

_.isPlainObject(null); // false

In this example, the first two calls to _.isPlainObject return true because {} and new Object() are both plain objects. In contrast, the third call returns false because new Person() creates an object that has a prototype, which means it's not a plain object.

The fourth call also returns false because [] creates an object with a prototype, which makes it not a plain object. Finally, the last call to _.isPlainObject returns false because null is not an object at all.

Overall, _.isPlainObject is a useful method to have in your utility belt when working with JavaScript objects, making it easier for you to determine whether a given value is a plain object or not.