Aside from allowing users to keep logs of their expenses, the MERN Expense Tracker application will process the collected expense data to give users insights into their spending habits over time. We will implement simple data aggregation and visualization features to demonstrate how the MERN stack can accommodate such requirements in any full-stack application. To enable these features, we will utilize MongoDB's aggregation framework and also the React-based charting and data visualization library—Victory—by Formidable.
In the following sections, we will first add features to summarize a user's expenses in the current month and also show how they are doing compared to previous months. Then, we will add different Victory charts to give them a visual representation of their spending patterns over a month, and a year, and...
