I understand that an ease-in-out curve starts slow, gets fast in the middle, and then ends slow. But what if I want the opposite of that? Starts fast, slow in the middle, ends fast? The reason is that I want to simulate a super-high jump. I'd like to use it but can't find any info about it because I don't know what it's called, and searching for "inverse in-out-ease" is not working out for me.

I'm sure people use this all the time on their websites but I just can't find any info on how to do it.

Thanks in advance.


At GreenSock we call this a slow-mo ease (for slow motion). Our shortname for it in GSAP 3 is "slow".

I just can't find any info on how to do it.

As stated, in GSAP this ease (and many others) are included. GSAP also provides a custom ease functionality (including the ability to modify existing ease curves) so you can get the exact ease that you need.

Here's an example text animation effect using GSAP's slowmo ease. Carl (SnorklTV) has an antire mini-series on GSAP easing including a focus on slowmo if that interests you. Check it out!

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