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Lucas Gallindo
1,781 PointsWorking but I get Uncaught TypeError: Cannot read property 'offsetX' of undefined message
So guys, the simple drawing application is working fine, but I noticed that when I move the cursor into the canvas I get this error message on the console:
Uncaught TypeError: Cannot read property 'offsetX' of undefined
Is it OK? I mean, it makes sense, I am actually triggering the .mousemove event, but I just want to make sure if there isn't anything wrong.
Lucas Gallindo
1,781 PointsSorry, first time I made a question here. Here is the Snapshot The course is this one: JQuery Basiscs Drawing application
It's about to be retired from tree house, but I didn't really like the course that is replacing it, so I watched it anyway.
1 Answer
Steven Parker
229,744 PointsTry setting mouseDown initially to false.
On line 37, you initialize mouseDown to true, so when the cursor enters the canvas the handler will try to get the coordinates of the previous location which has not yet been saved.
You should initialize mouseDown to false instead.
Lucas Gallindo
1,781 PointsThanks!
Steven Parker
229,744 PointsSteven Parker
229,744 PointsYou should not see such an error. To facilitate analysis of your issue, please share your (markdown formatted) code here, or even better, make a snapshot of your workspace and post the link to it here.
A link to the course page in question would also be helpful.