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JavaScript

Bryan Dobberstein
Bryan Dobberstein
16,361 Points
Posted by Bryan Dobberstein
Bryan Dobberstein
16,361 Points

() => vs function ()

https://teamtreehouse.com/library/objectoriented-javascript/introduction-to-methods/returning-values

I was playing around with the code on the video. When I replace roll: function ()... with roll: () =>... I get NaN as a result on when clicking the button on the page, but still get a number when I run dice.roll() in the console. Is there a reason for this?

FWIW I'm using Firefox 58.0.2 on Linux Mint 18.3.

2 Answers

Steven Parker
Steven Parker
231,269 Points
Steven Parker
Steven Parker
231,269 Points

The function in question uses "this", which is not established by arrow functions. There are a few other differences as well. See this MDN documentation page for more details.