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Lissajous Curves GSAP 3

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I have some problems with this try to use GSAP 3 but It didn't work. Anyone gives me solution ? 

See the Pen RwKvbKQ by longd (@longd) on CodePen

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I noticed a few things:

  • You had a bad value:
    // BAD
    x: "+= + ${somePI}",
    // GOOD
    x: `+=${somePI}`,
    // ALSO GOOD
    x: "+=" + somePI,


  • Your modifier was returning NaN because the "x" value that gets passed in is a string with units, like "0px", so Math.cos("0px") is NaN. 
  • You're using the old syntax where the duration is the 2nd parameter. It still works, but I'd encourage you to move to the more modern syntax where "duration" is in the vars. 
  • You don't need your own random() function - GSAP has that built in. gsap.utils.random()

Here's a fork with the corrections in place:

See the Pen KKaJPbp?editors=0010 by GreenSock (@GreenSock) on CodePen


Does that clear things up? 

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