This example shows a bar plot that appears empty at first, with axes and margins defined but no data loaded into the visualization. The code sets up an SVG canvas sized 960 by 500 pixels using d3-selection, and defines a reusable barplot module with getter and setter functions for data and options. The plot specifies three y-keys—Nitrogen, Oxygen, and Helium—and a margin object, though the main function initializes an empty data array. The rendering approach uses the SVG element directly in the HTML, with styling applied through an external CSS file that hides page overflow.