Eslint Globals Configuration with Lodash

Introduction

Linting is a critical step in the software development process that helps you identify and fix errors in your code. Eslint is a popular linter that helps you maintain consistency and find errors in your code in Javascript projects. One of the essential parts of using Eslint is to allow access to global variables of third-party libraries like Lodash.

In this article, we will explore the Eslint Globals configuration with Lodash and how to set it up in your project.

Step 1: Install Dependencies

To use Eslint with Lodash, you need to install the Eslint plugin for Lodash. You can do this by running the following command in the terminal:

npm install eslint-plugin-lodash

This command installs the plugin and makes it available for your project.

Step 2: Configure Eslint

Once you have installed the plugin, you need to configure Eslint to allow access to global variables of Lodash. You can do this by adding the following code to your .eslintrc configuration file:

{
  "globals": {
    "_": true
  },
  "plugins": [
    "lodash"
  ],
  "rules": {
    "lodash/prefer-lodash-method": "warn"
  }
}

Here, we have added the globals property to allow access to the global variable _ of Lodash. We have also added the plugins property to enable the Lodash Eslint plugin for your project. Additionally, we have set a rule in the rules property to warn when we use the Lodash method instead of native Javascript methods.

Step 3: Usage

Once you have configured Eslint for Lodash, you can use Lodash functions in your code without any warnings. Here is an example of using the map function of Lodash in a Javascript module:

import _ from 'lodash';

const array = [1, 2, 3];

const newArray = _.map(array, x => x * 2);

console.log(newArray);

Here, we have imported the Lodash library using the _ variable and used the map function to create a new array with doubled values. You can use other Lodash functions in a similar way without any issues.

Conclusion

In conclusion, we have seen how we can configure Eslint for Lodash and use Lodash functions in our code without any warnings. Configuring Eslint in this way helps you catch errors and maintain consistency in your code. If you are using Lodash in your Javascript project, using this configuration can be beneficial.