Bar charts are one of the most common ways to compare data side by side — sales by month, scores by team, or traffic by channel.
In this challenge, you will build a Chart.js Bar Graph that compares monthly sales across two years. Use Chart.js to create a bar chart with multiple datasets, custom colors for each year, a legend to tell them apart, and styled gridlines.
Load Chart.js from CDN, create a canvas element with the right ID, and configure the chart with labels, datasets, and responsive sizing.
