单按钮动画

本文仅仅自己备份使用

html

      <button @click="handleClick" class="theme-toggle-btn" :class="{ dark: currentTheme === 'dark' }" aria-label="Toggle theme">
        <span class="sun-icon">☀️</span>
        <span class="moon-icon"></span>
      </button>


// currentTheme是light和dark
// switchTheme是切换主题逻辑

import { currentTheme, switchTheme,  } from "../utils/theme"
const handleClick = (event) => {
  if (!document.startViewTransition) {
    switchTheme()
    return
  }

  const x = event.clientX
  const y = event.clientY
  const endRadius = Math.hypot(
    Math.max(x, innerWidth - x),
    Math.max(y, innerHeight - y)
  )

  const transition = document.startViewTransition(() => {
    switchTheme()
  })

  transition.ready.then(() => {
    const clipPath = [`circle(0px at ${x}px ${y}px)`, `circle(${endRadius}px at ${x}px ${y}px)`]
    document.documentElement.animate(
      {
        clipPath: currentTheme.value === "dark" ? [...clipPath].reverse() : clipPath
      },
      {
        duration: 500,
        easing: 'ease-in',
        pseudoElement: currentTheme.value === "dark" ? "::view-transition-old(root)" : "::view-transition-new(root)"
      }
    )
  })
}

scss

::view-transition-old(root),
::view-transition-new(root) {
  animation: none;
  mix-blend-mode: normal;
}

::view-transition-old(root) {
  z-index: 1;
}

::view-transition-new(root) {
  z-index: 2147483646;
}

.dark::view-transition-old(root) {
  z-index: 2147483646;
}

.dark::view-transition-new(root) {
  z-index: 1;
}




root {
  --bg-light: #f5f5f5;
  --text-light: #333;
  --bg-dark: #1a1a1a;
  --text-dark: #f0f0f0;
}

body {
  background: var(--bg-light);
  color: var(--text-light);
  transition: background 0.3s, color 0.3s;
}

.dark body {
  background: var(--bg-dark);
  color: var(--text-dark);
}





.theme-toggle-btn {
  position: relative;
  width: 48px;
  height: 24px;
  border-radius: 12px;
  background: var(--bg-light);
  border: none;
  cursor: pointer;
  transition: background 0.3s;
}

.theme-toggle-btn.dark {
  background: var(--bg-dark);
}

.sun-icon, .moon-icon {
  position: absolute;
  top: 2px;
  transition: all 0.3s ease;
}

.sun-icon {
  left: 2px;
  opacity: 1;
}

.moon-icon {
  right: 2px;
  opacity: 0;
}

.dark .sun-icon {
  opacity: 0;
}

.dark .moon-icon {
  opacity: 1;
}