I don't really understand what thumbLinks are and why we need them. 

I would like to talk more about the first steps.

can you talk more about data attributes / The data- attributes and when to use them

Can you explain why .preventDefault() is important to use? Why would we not want an event handler to carry out the code it has?

The steps to create the ottergram event handler were very long and complicated; could we perhaps summarize the steps?

could you say more about DOM elements?

The reading was clear