此模式展示了如何创建可通过鼠标和键盘访问的 3D 游戏菜单。
完整文章 · YouTube 上的视频 · GitHub 上的来源
HTML
<ul class="threeD-button-set">
<li><button>New Game</button></li>
<li><button>Continue</button></li>
<li><button>Online</button></li>
<li><button>Settings</button></li>
<li><button>Quit</button></li>
</ul>
CSS
body {
perspective: 40vw;
}
.threeD-button-set {
--y:;
--x:;
--distance: 1px;
--theme: hsl(180 100% 50%);
--theme-bg: hsl(180 100% 50% / 25%);
--theme-bg-hover: hsl(180 100% 50% / 40%);
--theme-text: white;
--theme-shadow: hsl(180 100% 10% / 25%);
--_max-rotateY: 10deg;
--_max-rotateX: 15deg;
--_btn-bg: var(--theme-bg);
--_btn-bg-hover: var(--theme-bg-hover);
--_btn-text: var(--theme-text);
--_btn-text-shadow: var(--theme-shadow);
--_bounce-ease: cubic-bezier(.5, 1.75, .75, 1.25);
/* remove
margins */
margin: 0;
/* vertical rag-right layout */
display: flex;
flex-direction: column;
align-items: flex-start;
gap: 2.5vh;
/* create 3D space context */
transform-style: preserve-3d;
/* clamped menu rotation to not be too extreme */
transform:
rotateY(
clamp(
calc(var(--_max-rotateY) * -1),
var(--y),
var(--_max-rotateY)
)
)
rotateX(
clamp(
calc(var(--_max-rotateX) * -1),
var(--x),
var(--_max-rotateX)
)
)
;
/* removes Safari focus ring on
after button interaction */
&:focus {
outline: none;
}
@media (--motionOK) {
will-change: transform;
transition: transform .1s ease;
animation: rotate-y 5s ease-in-out infinite;
}
@media (--dark) {
--theme: hsl(255 53% 50%);
--theme-bg: hsl(255 53% 71% / 25%);
--theme-bg-hover: hsl(255 53% 50% / 40%);
--theme-shadow: hsl(255 53% 10% / 25%);
}
@media (--HDcolor) {
@supports (color: color(display-p3 0 0 0)) {
--theme: color(display-p3 .4 0 .9);
}
}
}
.threeD-button-set > li {
/* change display type from list-item */
display: inline-flex;
/* create context for button pseudos */
position: relative;
/* create 3D space context */
transform-style: preserve-3d;
}
.threeD-button-set button {
/* strip out default button styles */
appearance: none;
outline: none;
border: none;
-webkit-tap-highlight-color: transparent;
/* bring in brand styles via props */
background-color: var(--_btn-bg);
color: var(--_btn-text);
text-shadow: 0 1px 1px var(--_btn-text-shadow);
font-size: min(5vmin, 3rem);
font-family: Audiowide;
padding-block: .75ch;
padding-inline: 2ch;
border-radius: 5px 20px;
/* prepare for 3D perspective transforms */
transform: translateZ(var(--distance));
transform-style: preserve-3d;
&:is(:hover, :focus-visible):not(:active) {
/* subtle distance plus bg color change on hover/focus */
--distance: 15px;
background-color: var(--_btn-bg-hover);
/* if motion is OK, setup transitions and increase distance */
@media (--motionOK) {
--distance: 3vmax;
transition-timing-function: var(--_bounce-ease);
transition-duration: .4s;
&::after { transition-duration: .5s }
&::before { transition-duration: .3s }
}
}
&::after,
&::before {
/* create empty element */
content: '';
opacity: .8;
/* cover the parent (button) */
position: absolute;
inset: 0;
/* style the element for border accents */
border: 1px solid var(--theme);
border-radius: 5px 20px;
/* move in Z space with a multiplier */
transform: translateZ(calc(var(--distance) / 3));
/* if motion is OK, transition the Z space move */
@media (--motionOK) {
transition: transform .1s ease-out;
}
}
/* exceptions for one of the pseudo elements */
/* this will be pushed back and have a thicker border */
&::before {
border-width: 3px;
transform: translateZ(calc(var(--distance) / 3 * -1));
/* in dark mode, it glows! */
@media (--dark) {
box-shadow:
0 0 25px var(--theme),
inset 0 0 25px var(--theme);
}
}
@media (--motionOK) {
will-change: transform;
transition:
transform .2s ease,
background-color .5s ease;
}
}
@keyframes rotate-y {
50% {
transform: rotateY(15deg) rotateX(-6deg);
}
}
JS
import {rovingIndex} from 'https://cdn.skypack.dev/roving-ux'
const menu = document.querySelector('.threeD-button-set')
const menuRect = menu.getBoundingClientRect()
const { matches:motionOK } = window.matchMedia(
'(prefers-reduced-motion: no-preference)'
)
rovingIndex({
element: document.querySelector('.threeD-button-set'),
target: 'button',
})
if (motionOK) {
window.addEventListener('mousemove', ({target, clientX, clientY}) => {
const {dx,dy} = getAngles(clientX, clientY)
menu.style.setProperty('--x', `${dy / 20}deg`)
menu.style.setProperty('--y', `${dx / 20}deg`)
})
}
const getAngles = (clientX, clientY) => {
const { x, y, width, height } = menuRect
const dx = clientX - (x + 0.5 * width)
const dy = clientY - (y + 0.5 * height)
return {dx,dy}
}