deleteRule CSSKeyframesRule method confusing behaviour in IE11
问题 I have created basic animation of a circle using css @keyframes. I'm using javascript to trigger animation start/stop by click inside the circle. The animation itself could be divided into 5 (looped) phases: pause-expand-pause-shrink-pause (see @keyframes css section below) The goal I want to achieve is, eventually, to be able to set animation duration and change the values of keyframes (say by having input fields for pause and expand/shrink durations - details doesn't really matter for the