The code for the <BarChart> component is written in the BarChart/index.ts file. This file prepares the chart content and returns it wrapped in a component named <BarAndLineChartsWrapper>
BarAndLineChartsWrapper is a common component for all types of Bar and Line charts. It takes the chart-content (bar or stacked bar) and adds to it the common elements like the X and Y axes, the background and rules etc.
It accepts a prop named renderChartContent which renders the actual chart.
The architecture of Line chart can be understood with the below image-
