Svelte基础
Advanced Svelte
Advanced reactivity
Motion
Advanced bindings
Advanced transitions
Context API
Special elements
<script module>
Next steps
Basic SvelteKit
Introduction
Routing
Loading data
Headers and cookies
Shared modules
API routes
$app/state
Errors and redirects
Advanced SvelteKit
Page options
Link options
Advanced routing
Advanced loading
Environment variables
Conclusion
除了class, 小主还可以设置style：
As with
class, you can write your inlinestyleattributes literally, because Svelte is really just HTML with fancy bits:
App
<button
class="card"
style="transform: {flipped ? 'rotateY(0)' : ''}; --bg-1: palegoldenrod; --bg-2: black; --bg-3: goldenrod"
onclick={() => flipped = !flipped}
>如果样式比较多，看起来是不是很难看，毕竟字符串不是🦵越长越好看, 贴心的爱美的Svelte当然不能坐视不管，小主请试下style:指令:
When you have a lot of styles, it can start to look a bit wacky. We can tidy things up by using the
style:directive:
App
<button
class="card"
style:transform={flipped ? 'rotateY(0)' : ''}
style:--bg-1="palegoldenrod"
style:--bg-2="black"
style:--bg-3="goldenrod"
onclick={() => flipped = !flipped}
>这样是不是就好看多了，欧！这看脸的时代！好看还是挺重要的。
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<script>
let flipped = $state(false);
</script>
<div class="container">
Flip the card
<button
class={["card", { flipped }]} onclick={() => flipped = !flipped}>
<div class="front">
<span class="symbol">♠</span>
</div>
<div class="back">
<div class="pattern"></div>
</div>
</button>
</div>
<style>
.container {display: flex;
flex-direction: column;
gap: 1em;
height: 100%;
align-items: center;
justify-content: center;
perspective: 100vh;
}
.card {position: relative;
aspect-ratio: 2.5 / 3.5;
font-size: min(1vh, 0.25rem);
height: 80em;
background: var(--bg-1);
border-radius: 2em;
transform: rotateY(180deg);
transition: transform 0.4s;
transform-style: preserve-3d;
padding: 0;
user-select: none;
cursor: pointer;
}
.card.flipped {transform: rotateY(0);
}
.front, .back {display: flex;
align-items: center;
justify-content: center;
position: absolute;
width: 100%;
height: 100%;
left: 0;
top: 0;
backface-visibility: hidden;
border-radius: 2em;
border: 1px solid var(--fg-2);
box-sizing: border-box;
padding: 2em;
}
.front {background: url(./svelte-logo.svg) no-repeat 5em 5em, url(./svelte-logo.svg) no-repeat calc(100% - 5em) calc(100% - 5em);
background-size: 8em 8em, 8em 8em;
}
.back {transform: rotateY(180deg);
}
.symbol {font-size: 30em;
color: var(--fg-1);
}
.pattern {width: 100%;
height: 100%;
background-color: var(--bg-2);
/* pattern from https://projects.verou.me/css3patterns/#marrakesh */
background-image:
radial-gradient(var(--bg-3) 0.9em, transparent 1em),
repeating-radial-gradient(var(--bg-3) 0, var(--bg-3) 0.4em, transparent 0.5em, transparent 2em, var(--bg-3) 2.1em, var(--bg-3) 2.5em, transparent 2.6em, transparent 5em);
background-size: 3em 3em, 9em 9em;
background-position: 0 0;
border-radius: 1em;
}
</style>