REPL

The Node.js REPL (Read-Evaluate-Print-Loop) is a powerful tool for quickly exploring and testing Node.js features. This guide will show you how to use the Node.js REPL effectively. Running the Node.js REPL To start the Node.js REPL, open your terminal and execute the node command without specifying a file: node This will start the REPL, and you’ll see a prompt (>). The REPL is now ready to accept and evaluate JavaScript code....

This post is part of the Johnny Five series. See the first post here. When working with Johnny Five, it’s important to understand the concept of a REPL (Read-Evaluate-Print-Loop). The REPL allows us to interactively write and execute code in the terminal. To start using the REPL, create a repl.js file with the following code: const { Board } = require("johnny-five"); const board = new Board(); In this example, we’ll be using an LCD circuit that we created in a previous lesson....