Lodash - Environment Setup - Adglob Infosystem Pvt Ltd

In this chapter, you will learn in detail about setting up the working Lodash Environment Setup on your local computer. Before you begin working on Lodash, you need to have the access to the library. You can access its files in any of the following methods −

Method 1: Using Lodash File in Browser

In this method, we are going to need the Lodash file from its official website and will use it directly in the browser.

Step 1

As a first step, go to the official website of Lodash https://lodash.com/.

Observe that there is a download option available that gives you the latest lodash.min.js file CDN Copies available. Click on the link and select the latest link for lodash.min.js.

Step 2

Now, include lodash.min.js inside the script tag and start working with Lodash. For this, you can use the code given below −

<script type = "text/JavaScript" 
   src = "https://cdn.jsdelivr.net/npm/[email protected]/lodash.min.js">
</script>

Given here are a working example and its output for a better understanding −

Example

<html>
   <head>
      <title>Lodash - Working Example</title>
      <script type = "text/JavaScript" src = "https://cdn.jsdelivr.net/npm/[email protected]/lodash.min.js"></script>
      <style>
         div {
            border: solid 1px #ccc;
            padding:10px;
            font-family: "Segoe UI",Arial,sans-serif;
            width: 50%;
         }
      </style>
   </head>
   <body>
      <div style = "font-size:25px" id = "list"></div>
      <script type = "text/JavaScript">
         var numbers = [1, 2, 3, 4];
         var listOfNumbers = '';
         _.each(numbers, function(x) { listOfNumbers += x + ' ' });
         document.getElementById("list").innerHTML = listOfNumbers;
      </script>
   </body>
</html>

Output

1 2 3 4

Method 2: Using Node.js

If you are opting for this method, make sure you have Node.js and npm installed on your system. You can use the following command to install Lodash −

npm install lodash

You can observe the following output once Lodash is successfully installed −

+ [email protected]
added 1 package from 2 contributors and audited 1 package in 2.54s
found 0 vulnerabilities

Now, to test if Lodash works fine with Node.js, create the file tester.js and add the following code to it −

var _ = require('lodash');
var numbers = [1, 2, 3, 4];
var listOfNumbers = '';
_.each(numbers, function(x) { listOfNumbers += x + ' ' });
console.log(listOfNumbers);is

Save the above program in tester.js. The following commands are used to compile and execute this program.

Command

\>node tester.js

Output

1 2 3 4

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