lodash.has

What is lodash.has?

The lodash.has package is a method from the Lodash library, which is a popular JavaScript utility library. This specific method is used to check if a path exists as a property in a given object, which can be deeply nested. It helps in safely checking for the existence of a property without manually traversing the properties and handling errors.

What are lodash.has's main functionalities?

Check existence of a property

This feature allows you to check whether a specific path exists within an object. It returns true if the path exists, otherwise false. This is useful for avoiding errors when accessing deeply nested properties.

const _ = require('lodash.has');
const object = { 'a': { 'b': { 'c': 3 } } };
console.log(_.has(object, 'a.b.c')); // => true
console.log(_.has(object, 'a.b.c.d')); // => false

Other packages similar to lodash.has

object-path

object-path is a package that provides a similar functionality to lodash.has, allowing access to nested object properties via a path. It also offers additional methods for setting and deleting properties. Compared to lodash.has, object-path provides a more comprehensive solution for handling object paths.

dot-prop

dot-prop is another npm package that allows you to get, set, or delete properties from a nested object using a dot path. While lodash.has only checks for the existence of a path, dot-prop extends this by allowing modifications to the object, making it more versatile.

README

lodash.has v3.2.1

The modern build of lodash’s _.has exported as a Node.js/io.js module.

Installation

Using npm:

$ {sudo -H} npm i -g npm
$ npm i --save lodash.has

In Node.js/io.js:

var has = require('lodash.has');

See the documentation or package source for more details.