To Do List (DOM Manipulation)

Linked below are several CodePens demonstrating the various stages of building a to do list. The final link is also embedded below:

Task 1
https://codepen.io/joharehawkins/pen/MWRpMKg

Task 2
https://codepen.io/joharehawkins/pen/GRLvBoN

Task 3
https://codepen.io/joharehawkins/pen/MWRvBPR

Task 4
https://codepen.io/joharehawkins/pen/BaEdPeV

Task 5
https://codepen.io/joharehawkins/pen/QWPMVYb

Task 6
https://codepen.io/joharehawkins/pen/ExJwaWg

Please press the JS button to see JavaScript. Please also click to "see the pen" to see output in the Codepen console.