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JavaScript jQuery Basics (2014) Creating a Simple Drawing Application Perform: Part 5

Anthony Lafont
Anthony Lafont
17,075 Points
Posted by Anthony Lafont
Anthony Lafont
17,075 Points

TypeError: undefined is not an object (evaluating 'lastEvent.offsetX')

Hi everyone,

I can't find what I'm doing wrong! here is the snapshot of my code : https://w.trhou.se/rgrlu5t7zv

Thanks!

Noel Peña
Noel Peña
5,900 Points
Noel Peña
Noel Peña
5,900 Points

Hi Anthony,

In the app.js file check line 56. It looks like you are using the assigning operator (=) vs the check for comparison operator (==). Should be:

if (mouseDown == true) {

or just

if (mouseDown){

2 Answers

Tom Gooding
Tom Gooding
16,735 Points
Tom Gooding
Tom Gooding
16,735 Points

Hi Anthony

Check your comparison operator in the if statement for .mousemove... You're currently setting mouseDown to true every time the mouse moves!

Cheers

Anthony Lafont
Anthony Lafont
17,075 Points
Anthony Lafont
Anthony Lafont
17,075 Points

Dammit! I should have saw that :/

Thanks guys, you rock!