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"Translate" set in GSAP not working properly in Firefox

ohem test
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Hi, I have some text which I'm vertically centering using 


  top: 50%;
  transform: translateY(-50%);

I figured it would be better to set it using GSAP to avoid prefixes & have it work cross-browser.  So I switched to this: 

.set(".headline", {top: "50%", transform: "translateY(-50%)"})


While it works great in Chrome, for some reason it does not set the alignment as expected in Firefox.  Is there a way to fix this, or should just I do this part in the CSS?


Here's a simplified example: 


Any suggestions are appreciated.

See the Pen yLOVEmE by ohem (@ohem) on CodePen

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FYI, that's definitely caused by a Firefox bug (which I haven't seen before): 

let div = document.createElement("div");
div.style.transform = "translateY(-50%)";
console.log(window.getComputedStyle(div).transform); // returns WRONG value in Firefox!!!

But yeah, I'd always recommend setting things using the proper GSAP shortcuts syntax like @PointC suggested. Much cleaner, more reliable and performant too. 👍

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