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Web fonts odd tweening effect/bug

sorciereus test
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Go to solution Solved by ohem,

Warning: Please note

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 Some information, especially the syntax, may be out of date for GSAP 3.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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Hi there. I'm using TweenMax to do position tweens on divs containing text that is styled using a font family from google fonts.


The font weight is bold.


I find on Firefox and Safari, the font seems to change weight during the tween. Is this a known bug?


(don't have time to put together a codepen at the moment but will if needed) 

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  • Solution

I've come across the same issue... adding force3D:false should fix it.  


force3D:true can also fix it, but it makes the text appear thinner in Safari so I prefer false.


If you don't mind the text being slightly thinner you can also just do this in the CSS; that fixes it too: 

-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
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