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Build an Average Ratings Calculator with JavaScript

In this code lab, you'll follow instructions to build a simple Average Ratings Calculator with JavaScript. You'll create a custom function, handle events, and use common JavaScript operators to calculate an average star rating.

Lab platform
Lab Info
Level
Beginner
Last updated
Aug 30, 2025
Duration
45m

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Table of Contents
  1. Challenge

    Calculate Average Rating

    Overview

    In this lab, you’ll follow along with our instructions and build a simple Average Ratings Calculator with JavaScript. You’ll create a custom function, handle events, and use common JavaScript operators to calculate an average star rating.

    By the end of this module, you’ll have created a simple javascript application that calculates an average rating depending on the number of each star rating from 1 to 5. ### Solution The solution can be found in the solution directory.

About the author

Tom is a staff author at Pluralsight helping to develop Hands-On content. Tom's background in software development, UI/UX, and instructional design was developed over the years while working as a faculty member at the School of Computing at Weber State University in Utah, and continues to grow as he develops Projects and Labs for Pluralsight. When he's not creating content to allow learners to gain real-life experience, he enjoys spending time with his family.

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