--- title: Easing variables tags: animation,beginner --- Variables that can be reused for `transition-timing-function` properties, more powerful than the built-in `ease`, `ease-in`, `ease-out` and `ease-in-out`. - The variables are defined globally within the `:root` CSS pseudo-class which matches the root element of a tree representing the document. - In HTML, `:root` represents the `` element and is identical to the selector `html`, except that its specificity is higher. ```html
Hover
``` ```css :root { /* Place variables in here to use globally */ } .easing-variables { --ease-in-quad: cubic-bezier(0.55, 0.085, 0.68, 0.53); --ease-in-cubic: cubic-bezier(0.55, 0.055, 0.675, 0.19); --ease-in-quart: cubic-bezier(0.895, 0.03, 0.685, 0.22); --ease-in-quint: cubic-bezier(0.755, 0.05, 0.855, 0.06); --ease-in-expo: cubic-bezier(0.95, 0.05, 0.795, 0.035); --ease-in-circ: cubic-bezier(0.6, 0.04, 0.98, 0.335); --ease-out-quad: cubic-bezier(0.25, 0.46, 0.45, 0.94); --ease-out-cubic: cubic-bezier(0.215, 0.61, 0.355, 1); --ease-out-quart: cubic-bezier(0.165, 0.84, 0.44, 1); --ease-out-quint: cubic-bezier(0.23, 1, 0.32, 1); --ease-out-expo: cubic-bezier(0.19, 1, 0.22, 1); --ease-out-circ: cubic-bezier(0.075, 0.82, 0.165, 1); --ease-in-out-quad: cubic-bezier(0.455, 0.03, 0.515, 0.955); --ease-in-out-cubic: cubic-bezier(0.645, 0.045, 0.355, 1); --ease-in-out-quart: cubic-bezier(0.77, 0, 0.175, 1); --ease-in-out-quint: cubic-bezier(0.86, 0, 0.07, 1); --ease-in-out-expo: cubic-bezier(1, 0, 0, 1); --ease-in-out-circ: cubic-bezier(0.785, 0.135, 0.15, 0.86); display: inline-block; width: 75px; height: 75px; padding: 10px; color: white; line-height: 50px; text-align: center; background: #333; transition: transform 1s var(--ease-out-quart); } .easing-variables:hover { transform: rotate(45deg); } ```