Description

Setting some specific properties to empty value with jQuery.css once and setting a new style disables the animation (CSS transition). See the following examples.

• jQuery 3.2.1: https://jsfiddle.net/y34h7aef/
  • The div animates.
• jQuery 3.3.1: https://jsfiddle.net/j5ranug1/
  • The div doesn't animate.

This looks like a breaking change introduced in 3.3.0. I believe this is an unexpected behavior. It animates when I use jQuery 2 (https://jsfiddle.net/L1u7o8zv/).

Link to test case

https://jsfiddle.net/j5ranug1/