Build a Functional Spreadsheet in JavaScript | FreeCodeCamp Steps 1–12

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Try yourself: www.freecodecamp.org/learn/javascript-algorithms-and-data-structures-v8/#learn-functional-programming-by-building-a-spreadsheet

In this video, we kick off a hands-on journey into functional programming by building a simple spreadsheet app from scratch using vanilla JavaScript. Covering Steps 1–12 of the FreeCodeCamp tutorial, you’ll learn how to:

🔨 Programmatically generate your spreadsheet’s container, rows, columns, and cell labels

🛠️ Leverage functional methods like map(), find() and includes() for clean, declarative code

🧮 Parse and evaluate formulas using parseInt() and custom logic

🔗 Handle cell references so that edits in one cell dynamically update others

🎛️ Create an interactive web interface that responds instantly to user input

Whether you’re new to FP or want to level up your JavaScript skills, this project will teach you how to break big problems into small, reusable functions and stitch them together into a working application.