JavaScript Closures — Explained with a Bank Account You'll Never Forget

📰 Dev.to · DHANRAJ S

Learn how JavaScript closures work using a relatable bank account analogy to improve your coding skills

intermediate Published 26 Mar 2026

Action Steps

Create a simple bank account object using JavaScript to demonstrate closure principles
Define a function inside another function to showcase how closures capture variables
Use the bank account example to illustrate how closures can be used to encapsulate data and behavior
Apply closure concepts to a real-world coding problem to solidify understanding
Test and debug your code to ensure closures are working as intended

Who Needs to Know This

Software engineers and frontend developers can benefit from understanding closures to write more efficient and effective code

Key Insight

💡 Closures capture variables from their outer scope, allowing for encapsulation and data hiding

Key Takeaways

Learn how JavaScript closures work using a relatable bank account analogy to improve your coding skills

Hey! Before we start — have you ever tried to understand closures and ended up more confused than...