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Detect playhead position change

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This thread was started before GSAP 3 was released. Some information, especially the syntax, may be out of date for GSAP 3. Please see the GSAP 3 migration guide and release notes for more information about how to update the code to GSAP 3's syntax. 

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Currently I can't find anything in the documentation to register a function to be called each time the playhead change.


You can listen to `onUpdate`, but this function doesn't trigger when you `timeline.seek(2)` to a position.


Any solution to be notified by every changed to the playhead without adding tons of timeline callbacks?

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Absolutely - by default (and very intentionally), the seek() method suppresses events because that's actually what most people prefer with seek(), but you can set the suppressEvents parameter to false:

tl.seek(10, false);

Or you could use time() instead because the default behavior for that method is not to suppress events:

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