You can view this chart here
A version of this visualization can also be viewed at https://observablehq.com/@toltman/aiddata-bar-chart.
This bar chart is based on Mike Bostock's Bar Chart. The tooltip implementation and design is based on Jianan Li's Basic Tooltip. The design of the chart was suggested by an exercise in Enrico Bertini and Cristian Felix's course Information Visualization: Advanced Techniques.
The dataset comes from the AidData Core Research Release, Version 3.1.
For this chart, I wanted to implement axis orientation switching based on data. For values of net donations greater than zero, the country names appear on the left side of the y-axis. For values of net donations less than zero, the country names appear on the right side of the y-axis. Labels on the y-axis never interfer with the direction of the bars as they dynamically "dodge" them.
setYaxisDirection is the function that dynamically switches the orientation of the y-axis.
The function takes 3 parameters, the data, the selection of the y-axis group and a function. The function will receive your data element and should return true if you want the orientation of this tick to be reversed. In my implementation I wanted the axis reversed if the net donations for this country was less than zero. Therefore, I passed
d => d.net_donations < 0
as my argument.