Chart.js Bar Graph

Implement a multi-dataset bar chart using Chart.js, rendering monthly sales comparisons with a custom legend.

Set up a Chart.js bar chart with two or more datasets representing different products or months. Each dataset should have its own color, and a legend should clearly label them.

Configure the chart with appropriate axis labels and scales. The bars should be grouped side by side for easy comparison.

Focus on setting up the Chart.js configuration object correctly: data, labels, datasets, and options.

Test that the chart renders with the legend, tooltips, and proper bar grouping.