Link to the github repository where this is stored

here are the little demos:

• Made while reading https://d3js.org/#introduction
  1. accessing dom elements with d3
  2. creating rainbow text by working with dom elements with d3 - (Made while reading https://d3js.org/#introduction)
• Made while reading https://bost.ocks.org/mike/bar/
  1. a bar chart with variable widths and heights and resizing - inspired by http://codepen.io/mbostock/pen/Jaemg
  2. ported svg example 3 from d3v3 to d3v4 - added resizing and turned labels
• Made while reading https://bost.ocks.org/mike/join/
  1. svg circles you can slide up and down - inspired while learnin more about joins here: http://d3indepth.com/enterexit/and adding mouseEvents via: https://bl.ocks.org/mbostock/4198499

You can view a long list of d3 tutorials here https://github.com/d3/d3/wiki/Tutorials