Files
frontend_v2/src/components/StreetSnap.astro
toom1996 c85c561a99 update
2026-09-13 00:49:42 +08:00

629 lines
27 KiB
Plaintext
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

---
import type { RawStreetSnap } from "@/lib/api"
import Breadcrumb from "@/components/Breadcrumb.astro"
import { getI18n } from "@/i18n/utils"
import { href, ROUTES } from '@/lib/routes'
import { ssrBase } from "@/lib/api"
interface Props {
snap: RawStreetSnap | null
error?: "missing" | "failed" | null
preview?: boolean // 后端未登录截断图片集时返回 true,详情页据此弹「登录查看全部图片」门禁
imageTotal?: number // 图片集真实总数(后端截断前),渲染「剩余 N 张」占位遮罩
}
const { snap, error = null, preview = false, imageTotal = 0 } = Astro.props
const { locale, t } = getI18n(Astro)
const full = (u: string): string => {
if (!u) return ""
if (/^https?:\/\//i.test(u)) return u
return ssrBase().replace(/\/$/, "") + u
}
const images = (snap?.images ?? [])
.map((im) => ({
id: im.id,
url: full(im.image || ""),
raw: im.image || "", // 相对路径:收藏快照存相对地址,不把宿主/端口写死进库
name: im.name || "",
}))
.filter((im) => im.url)
// 未登录预览上限:详情页(图集)未登录最多展示前 PREVIEW_LIMIT 张图片;其余由登录门禁提示,
// 已登录(客户端 loadFull 拉全量)或图片本就不超上限时全部展示。前 PREVIEW_LIMIT 张服务端已渲染(SEO/无 JS 友好)。
const PREVIEW_LIMIT = 5
const previewImages = images.slice(0, PREVIEW_LIMIT)
// 未登录预览占位遮罩数:补足「剩余 N 张」空图,提示登录后可见,避免误以为图集只有预览上限那几张。
// 已登录(preview=false)或图片本就不超上限时 lockedCount=0,不渲染占位。
const lockedCount = preview ? Math.max(0, (imageTotal || 0) - previewImages.length) : 0
const homeHref = href(locale, ROUTES.home)
// theimpression 标题含字面 \t:地点 \t 场次,列表/详情统一以 " · " 呈现
const displayTitle = (snap?.title || "").replace(/\t/g, " · ")
---
<div
id="street-snap-view"
x-data="streetSnapView()"
data-fav-type="snap_image"
data-gallery-uid={snap?.id ?? ""}
data-gallery-title={displayTitle}
data-gallery-brand=""
data-preview={preview ? "true" : "false"}
class="min-h-screen bg-white text-black font-sans selection:bg-black selection:text-white"
>
{
snap ? (
<article class="mx-auto max-w-[1600px] px-5 md:px-10 py-12 md:py-16">
<Breadcrumb>
<span slot="current" class="max-w-[60vw] truncate">{displayTitle}</span>
</Breadcrumb>
<h1 class="font-black leading-[0.95] tracking-tight text-[10vw] md:text-[4.5rem] mt-8">
{displayTitle}
</h1>
{previewImages.length > 0 && (
<section class="mt-16">
<div
id="snap-gallery"
class="grid grid-cols-2 md:grid-cols-3 gap-4"
>
{previewImages.map((im, i) => (
<figure
data-image-index={i}
data-image-url={im.url}
data-image-name={im.name}
data-fav-id={im.id}
data-fav-url={im.raw}
@click={`openLb(${i})`}
class="relative bg-[#f2f2f2] cursor-zoom-in group"
>
<img
src={im.url}
alt={im.name}
loading={i < 6 ? "eager" : "lazy"}
decoding="async"
class="w-full aspect-[3/4] object-cover group-hover:opacity-90 transition-opacity"
/>
{/* 单图收藏:hover 显示,已收藏常驻实心 */}
<button
login-required
type="button"
data-fav-id={im.id}
data-fav-url={im.raw}
@click.stop="toggleFav($el.dataset.favId, $el.dataset.favUrl)"
:class="isFav($el.dataset.favId) ? 'is-fav opacity-100' : 'opacity-0 group-hover:opacity-100'"
class="fav-btn absolute right-2 top-2 z-10 w-8 h-8 rounded-full border border-black/15 bg-white/80 text-[#111] flex items-center justify-center backdrop-blur-md hover:bg-black/5 hover:border-black/30 transition-all cursor-pointer"
aria-label={t('save')}
>
<svg class="w-4 h-4" viewBox="0 0 24 24" stroke="currentColor" stroke-width="1.6" stroke-linecap="round" stroke-linejoin="round">
<path d="M12 21C12 21 4 14.5 4 8.8C4 6.1 6.1 4 8.7 4C10.3 4 11.5 4.8 12 6C12.5 4.8 13.7 4 15.3 4C17.9 4 20 6.1 20 8.8C20 14.5 12 21 12 21Z"/>
</svg>
</button>
{im.name && (
<figcaption class="text-[11px] font-mono uppercase tracking-widest text-[#999] mt-2">
{im.name}
</figcaption>
)}
</figure>
) )}
{/* 未登录预览占位遮罩:补满「剩余 N 张」空图,提示用户登录后可见,
避免误以为图集只有预览上限那几张。已登录(x-show false)自动隐藏,由 extraImages 真实图替补。 */}
{lockedCount > 0 &&
Array.from({ length: lockedCount }).map(() => (
<figure
x-show="!isAuthed && preview"
x-cloak
login-redirect
class="relative bg-[#f2f2f2] cursor-pointer group overflow-hidden"
>
{/* 与真实图片等高的 3:4 图位:锁图标 + 提示,点击跳登录 */}
<div class="w-full aspect-[3/4] flex items-center justify-center text-[#c4c4c4] group-hover:text-[#9a9a9a] transition-colors pointer-events-none">
<div class="flex flex-col items-center gap-2">
<svg class="w-7 h-7" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.4" stroke-linecap="round" stroke-linejoin="round">
<rect x="4.5" y="10.5" width="15" height="10" rx="2" />
<path d="M8 10.5V7a4 4 0 0 1 8 0v3.5" />
</svg>
<span class="text-[10px] font-mono uppercase tracking-[0.18em]">{t('login to view')}</span>
</div>
</div>
{/* 与真实图 figcaption 同高的 caption 行(正常图显示 img01 等小字):
占位显示 +N photos,保证遮罩格子与真实图片格子总高一致 */}
<figcaption class="text-[11px] font-mono uppercase tracking-widest text-[#cfcfcf] mt-2">+{lockedCount} {t('photos')}</figcaption>
</figure>
))
}
{/* 登录后追加的额外图片:extraImages 由客户端 loadFull() 在已登录时填充,未登录为空不渲染 */}
<template x-for="(im, i) in extraImages" :key="im.url">
<figure
:data-image-index="5 + i"
:data-image-url="im.url"
:data-image-name="im.name"
:data-fav-id="im.id"
:data-fav-url="im.raw"
@click="openLb(5 + i)"
class="relative bg-[#f2f2f2] cursor-zoom-in group"
>
<img
:src="im.url"
:alt="im.name"
loading="lazy"
decoding="async"
class="w-full aspect-[3/4] object-cover group-hover:opacity-90 transition-opacity"
/>
<button
login-required
type="button"
:data-fav-id="im.id"
:data-fav-url="im.raw"
@click.stop="toggleFav($el.dataset.favId, $el.dataset.favUrl)"
:class="isFav($el.dataset.favId) ? 'is-fav opacity-100' : 'opacity-0 group-hover:opacity-100'"
class="fav-btn absolute right-2 top-2 z-10 w-8 h-8 rounded-full border border-black/15 bg-white/80 text-[#111] flex items-center justify-center backdrop-blur-md hover:bg-black/5 hover:border-black/30 transition-all cursor-pointer"
aria-label={t('save')}
>
<svg class="w-4 h-4" viewBox="0 0 24 24" stroke="currentColor" stroke-width="1.6" stroke-linecap="round" stroke-linejoin="round">
<path d="M12 21C12 21 4 14.5 4 8.8C4 6.1 6.1 4 8.7 4C10.3 4 11.5 4.8 12 6C12.5 4.8 13.7 4 15.3 4C17.9 4 20 6.1 20 8.8C20 14.5 12 21 12 21Z"/>
</svg>
</button>
<template x-if="im.name">
<figcaption class="text-[11px] font-mono uppercase tracking-widest text-[#999] mt-2" x-text="im.name"></figcaption>
</template>
</figure>
</template>
</div>
</section>
)}
</article>
) : (
<div class="flex flex-col items-center justify-center min-h-[60vh] px-5 text-center">
<p class="font-mono text-sm text-[#888] uppercase tracking-widest mb-4">
{error === "missing" ? t('No street snap ID specified') : t('Failed to load street snap. Please refresh or try later.')}
</p>
<a
href={homeHref}
class="text-[12px] font-mono uppercase tracking-[0.2em] border border-black px-4 py-2 hover:bg-black hover:text-white transition-colors"
>
← {t('Back to Index')}
</a>
</div>
)
}
{snap && previewImages.length > 0 && (
<div
x-show="lbOpen"
x-cloak
@keydown.window.escape="closeLb()"
@keydown.window.arrow-right="nextLb()"
@keydown.window.arrow-left="prevLb()"
class="fixed inset-0 z-[100] bg-white flex flex-col select-none"
aria-hidden="true"
>
<div
class="absolute top-5 left-1/2 -translate-x-1/2 z-30 font-mono text-[12px] font-semibold tracking-[0.14em] text-[#111] bg-white/75 border border-black/10 px-3 py-1.5 rounded-[6px] backdrop-blur-md"
x-text="`${lbIndex + 1} / ${imageCount}`"
></div>
<button
login-required
type="button"
@click.stop="toggleFav(currentFavId, currentFavUrl)"
:class="isFav(currentFavId) ? 'is-fav' : ''"
class="fav-btn absolute top-[18px] right-[70px] z-30 w-10 h-10 rounded-full border border-black/15 bg-white/75 text-[#111] flex items-center justify-center backdrop-blur-md hover:bg-black/5 hover:border-black/30 transition-all cursor-pointer"
aria-label={t('save')}
>
<svg class="w-[18px] h-[18px]" viewBox="0 0 24 24" stroke="currentColor" stroke-width="1.6" stroke-linecap="round" stroke-linejoin="round">
<path d="M12 21C12 21 4 14.5 4 8.8C4 6.1 6.1 4 8.7 4C10.3 4 11.5 4.8 12 6C12.5 4.8 13.7 4 15.3 4C17.9 4 20 6.1 20 8.8C20 14.5 12 21 12 21Z"/>
</svg>
</button>
<button
type="button"
@click="closeLb()"
class="absolute top-[18px] right-[18px] z-30 w-10 h-10 rounded-full border border-black/15 bg-white/75 text-[#111] flex items-center justify-center backdrop-blur-md hover:bg-black/5 hover:border-black/30 transition-all cursor-pointer"
aria-label={t('Close')}
>
✕
</button>
<div class="flex-1 min-h-0 flex items-stretch overflow-hidden relative">
<div
id="lb-thumbs"
class="w-[76px] sm:w-[118px] flex-none overflow-y-auto overflow-x-hidden relative scroll-smooth p-[32px_8px] sm:p-[38px_18px_38px_20px] border-r border-black/10 bg-gradient-to-b from-black/5 to-transparent no-scrollbar"
>
{previewImages.map((im, i) => (
<button
type="button"
data-lb-index={i}
data-thumb-url={im.url}
@click={`showLb(${i})`}
class="lb-thumb relative block w-full aspect-[3/4] mb-2 rounded-[2px] overflow-hidden cursor-pointer transition-all duration-200 opacity-40 hover:opacity-85 bg-[#eee] bg-cover bg-center"
x-bind:class="lbIndex === Number($el.dataset.lbIndex)
? 'opacity-100 scale-[1.03] ring-2 ring-[#111]'
: ''"
aria-label={`${i + 1}`}
>
<span class="absolute left-1 top-1 z-10 font-mono text-[8px] sm:text-[9px] font-semibold tracking-widest text-white px-1 py-0.5 rounded-[3px] bg-black/55 backdrop-blur-sm">
{String(i + 1).padStart(2, "0")}
</span>
</button>
))}
<template x-for="(im, i) in extraImages" :key="im.url">
<button
type="button"
:data-lb-index="5 + i"
:data-thumb-url="im.url"
@click="showLb(5 + i)"
class="lb-thumb relative block w-full aspect-[3/4] mb-2 rounded-[2px] overflow-hidden cursor-pointer transition-all duration-200 opacity-40 hover:opacity-85 bg-[#eee] bg-cover bg-center"
x-bind:class="lbIndex === Number($el.dataset.lbIndex)
? 'opacity-100 scale-[1.03] ring-2 ring-[#111]'
: ''"
:aria-label="String(5 + i + 1)"
>
<span class="absolute left-1 top-1 z-10 font-mono text-[8px] sm:text-[9px] font-semibold tracking-widest text-white px-1 py-0.5 rounded-[3px] bg-black/55 backdrop-blur-sm" x-text="String(5 + i + 1).padStart(2, '0')"></span>
</button>
</template>
</div>
<button
type="button"
@click.stop="prevLb()"
class="absolute left-3 sm:left-5 top-2 z-20 w-[52px] sm:w-[72px] h-[30px] sm:h-[34px] border border-black/15 bg-white/80 rounded-[6px] backdrop-blur-md flex items-center justify-center text-[#111] hover:bg-black/5 transition-all cursor-pointer"
aria-label={t('Previous image')}
>
<svg class="w-4 h-4 stroke-current fill-none stroke-2" viewBox="0 0 24 24"><path d="M6 14l6-6 6 6" /></svg>
</button>
<button
type="button"
@click.stop="nextLb()"
class="absolute left-3 sm:left-5 bottom-2 z-20 w-[52px] sm:w-[72px] h-[30px] sm:h-[34px] border border-black/15 bg-white/80 rounded-[6px] backdrop-blur-md flex items-center justify-center text-[#111] hover:bg-black/5 transition-all cursor-pointer"
aria-label={t('Next image')}
>
<svg class="w-4 h-4 stroke-current fill-none stroke-2" viewBox="0 0 24 24"><path d="M6 10l6 6 6-6" /></svg>
</button>
<button
type="button"
@click.stop="prevLb()"
class="absolute left-[82px] sm:left-[130px] top-1/2 -translate-y-1/2 z-20 w-10 h-10 rounded-full border border-black/15 bg-white/75 text-[#111] flex items-center justify-center backdrop-blur-md hover:scale-105 hover:border-black/30 transition-all cursor-pointer"
aria-label={t('Previous image')}
>
<svg class="w-5 h-5 stroke-current fill-none stroke-2" viewBox="0 0 24 24"><path d="M15 6l-6 6 6 6" /></svg>
</button>
<button
type="button"
@click.stop="nextLb()"
class="absolute right-2 sm:right-5 top-1/2 -translate-y-1/2 z-20 w-10 h-10 rounded-full border border-black/15 bg-white/75 text-[#111] flex items-center justify-center backdrop-blur-md hover:scale-105 hover:border-black/30 transition-all cursor-pointer"
aria-label={t('Next image')}
>
<svg class="w-5 h-5 stroke-current fill-none stroke-2" viewBox="0 0 24 24"><path d="M9 6l6 6 6-6" /></svg>
</button>
<div
id="lb-main"
@click.self="closeLb()"
class="flex-1 min-w-0 min-h-0 relative flex justify-center px-4 sm:px-18"
x-bind:class="lbZoomed
? 'overflow-y-auto overflow-x-hidden items-start'
: 'items-center'"
>
<img
id="lb-image"
src=""
alt=""
@click="toggleZoom()"
decoding="async"
class="block select-none transition-opacity duration-200"
x-bind:class="lbZoomed
? 'w-full max-w-full h-auto max-h-none cursor-zoom-out'
: 'max-w-full max-h-full object-contain cursor-zoom-in'"
/>
</div>
</div>
<div
class="absolute left-0 right-0 bottom-11 z-20 text-center text-black/60 font-mono text-[11px] uppercase tracking-[0.18em] pointer-events-none px-6"
x-text="currentImageName"
></div>
<div
x-show="!lbZoomed"
class="absolute left-0 right-0 bottom-4 z-20 text-center text-black/45 font-mono text-[11px] tracking-[0.14em] pointer-events-none px-6 transition-opacity duration-200"
>
{t('Click image to zoom · Scroll to view · Esc to close')}
</div>
</div>
)}
</div>
<script>
import { getUser, getStreetSnapDetailAuthed, toAbs } from "@/lib/api"
import { isFavorited, toggleImageFavorite, checkFavorited } from "@/lib/favorites"
document.addEventListener("alpine:init", () => {
Alpine.data("streetSnapView", () => ({
lbOpen: false,
lbIndex: 0,
lbZoomed: false,
imageCount: 0,
currentImageName: "",
// 单图收藏态:已收藏的图片 id 列表(本地即时 + 服务端校正)
favIds: [],
favType: "snap_image",
galleryUid: "",
galleryTitle: "",
galleryBrand: "",
// 登录态快照:用响应式属性暴露给 x-show 表达式(Alpine 表达式作用域访问不到模块 import 的 getUser,
// 故在此用 getUser() 初始化,避免 x-show="!getUser()..." 求值报错导致遮罩卡在 x-cloak 隐藏)。
isAuthed: false,
// 未登录门禁:后端截断图片集时为 true(详情页最多看 PREVIEW_LIMIT 张)
preview: false,
// 已登录后客户端补拉的全量图片(前 PREVIEW_LIMIT 张已由 SSR 服务端渲染)
extraImages: [] as { id: string; url: string; raw: string; name: string }[],
init() {
this.favType = this.$el.dataset.favType || "snap_image"
this.galleryUid = this.$el.dataset.galleryUid || ""
this.galleryTitle = this.$el.dataset.galleryTitle || ""
this.galleryBrand = this.$el.dataset.galleryBrand || ""
this.preview = this.$el.dataset.preview === "true"
this.isAuthed = !!getUser()
this.imageCount = document.querySelectorAll(
"#snap-gallery [data-image-index]"
).length
this.initThumbLazyLoading()
this.initImageFavs()
this.maybeLocateImageFromUrl()
// 已登录且后端未登录截断(preview):客户端拉全量图片集并追加渲染
if (getUser() && this.preview) this.loadFull()
// 登录后(如从门禁跳登录回跳)自动补全全量
window.addEventListener("auth:login", () => { this.isAuthed = true; if (this.preview) this.loadFull() })
},
// 已登录用户:拉取完整图片集,把第 PREVIEW_LIMIT+1 张起的图片追加进 extraImages 渲染。
async loadFull() {
if (!this.preview) return
try {
const full = await getStreetSnapDetailAuthed(this.galleryUid)
if (!full || !Array.isArray(full.images)) return
const mapped = (full.images || []).slice(5).map((im: any) => ({
id: im.id || "",
url: toAbs(im.image || ""),
raw: im.image || "",
name: im.name || "",
}))
this.extraImages = mapped
// 后端详情接口对所有用户统一返回 high 高清样式(付费墙已取消),首屏图即为高清,
// 无需客户端再按 VIP 替换。仅把第 6 张起的图片追加进 extraImages 渲染。
await this.$nextTick()
this.imageCount = document.querySelectorAll(
"#snap-gallery [data-image-index]"
).length
this.initImageFavs()
this.initThumbLazyLoading()
this.maybeLocateImageFromUrl()
} catch {
/* 失败维持截断态,门禁仍在 */
}
},
// ?img=<图片uid> 深链:个人中心点单图收藏 → 打开所属图集并滚动定位到该图。
// 默认只定位 + 短暂高亮,不弹灯箱(不打断浏览);显式带 &lb=1 才自动开灯箱。
maybeLocateImageFromUrl() {
if (typeof window === "undefined") return
const q = new URLSearchParams(window.location.search)
const want = q.get("img")
if (!want) return
const figures = Array.from(
document.querySelectorAll<HTMLElement>("#snap-gallery [data-fav-id]"),
)
const idx = figures.findIndex((el) => el.dataset.favId === want)
if (idx < 0) return
const fig = figures[idx] as HTMLElement
requestAnimationFrame(() => {
if (q.get("lb") === "1") {
this.openLb(idx)
return
}
fig.scrollIntoView({ behavior: "smooth", block: "center" })
fig.classList.add("locate-flash")
setTimeout(() => fig.classList.remove("locate-flash"), 2600)
})
},
getImageElement(index: number) {
return document.querySelector<HTMLElement>(
`#snap-gallery [data-image-index="${index}"]`
)
},
getImageUrl(index: number) {
return this.getImageElement(index)?.dataset.imageUrl || ""
},
getImageName(index: number) {
return this.getImageElement(index)?.dataset.imageName || ""
},
// ===== 单图收藏 =====
getImageFavId(index: number) {
return this.getImageElement(index)?.dataset.favId || ""
},
// 收藏用的图地址:读 figure 上的相对路径(存库时不带宿主)
getImageFavUrl(index: number) {
return this.getImageElement(index)?.dataset.favUrl || ""
},
allImageFavIds(): string[] {
return Array.from(
document.querySelectorAll<HTMLElement>("#snap-gallery [data-fav-id]"),
)
.map((el) => el.dataset.favId || "")
.filter(Boolean)
},
initImageFavs() {
const ids = this.allImageFavIds()
if (!ids.length) return
this.favIds = ids.filter((id) => isFavorited(id))
checkFavorited(ids).then((hit) => {
this.favIds = ids.filter((id) => hit.has(id))
})
},
isFav(id: string) {
return !!id && this.favIds.includes(id)
},
toggleFav(id: string, url: string) {
if (!id) return
toggleImageFavorite({
imageId: id,
type: this.favType === "snap_image" ? "snap_image" : "runway_image",
imageUrl: url,
parentUid: this.galleryUid,
title: this.galleryTitle,
brand: this.galleryBrand,
})
this.favIds = this.isFav(id)
? this.favIds.filter((x: string) => x !== id)
: [...this.favIds, id]
},
get currentFavId() {
return this.getImageFavId(this.lbIndex)
},
get currentFavUrl() {
return this.getImageFavUrl(this.lbIndex)
},
openLb(index = 0) {
if (!this.imageCount) return
this.lbIndex = this.normalizeIndex(index)
this.lbZoomed = false
this.lbOpen = true
document.body.style.overflow = "hidden"
this.updateLightboxImage()
requestAnimationFrame(() => {
this.scrollThumbIntoView()
this.preloadAround()
})
},
closeLb() {
this.lbOpen = false
this.lbZoomed = false
document.body.style.overflow = ""
},
showLb(index: number) {
if (!this.imageCount) return
this.lbIndex = this.normalizeIndex(index)
this.lbZoomed = false
this.updateLightboxImage()
const main = document.getElementById("lb-main")
if (main) main.scrollTop = 0
requestAnimationFrame(() => {
this.scrollThumbIntoView()
this.preloadAround()
})
},
nextLb() { this.showLb(this.lbIndex + 1) },
prevLb() { this.showLb(this.lbIndex - 1) },
normalizeIndex(index: number) {
if (!this.imageCount) return 0
return ((index % this.imageCount) + this.imageCount) % this.imageCount
},
updateLightboxImage() {
const image = document.getElementById("lb-image") as HTMLImageElement | null
if (!image) return
image.src = this.getImageUrl(this.lbIndex)
image.alt = this.getImageName(this.lbIndex)
this.currentImageName = this.getImageName(this.lbIndex)
},
toggleZoom() {
this.lbZoomed = !this.lbZoomed
const main = document.getElementById("lb-main")
if (main) main.scrollTop = 0
},
scrollThumbIntoView() {
const thumbs = document.getElementById("lb-thumbs") as HTMLElement | null
if (!thumbs) return
const active = thumbs.querySelector<HTMLElement>(`[data-lb-index="${this.lbIndex}"]`)
if (!active) return
const target = active.offsetTop - (thumbs.clientHeight - active.clientHeight) / 2
thumbs.scrollTo({ top: Math.max(0, target), behavior: "smooth" })
},
preloadAround() {
const indexes = [this.lbIndex, this.normalizeIndex(this.lbIndex - 1), this.normalizeIndex(this.lbIndex + 1)]
indexes.forEach((index: number) => {
const url = this.getImageUrl(index)
if (!url) return
const image = new Image()
image.decoding = "async"
image.src = url
})
},
initThumbLazyLoading() {
const thumbs = document.querySelectorAll<HTMLElement>("#lb-thumbs [data-thumb-url]")
if (!thumbs.length) return
if (!("IntersectionObserver" in window)) {
thumbs.forEach((thumb) => { thumb.style.backgroundImage = `url("${thumb.dataset.thumbUrl}")` })
return
}
const observer = new IntersectionObserver(
(entries, obs) => {
entries.forEach((entry) => {
if (!entry.isIntersecting) return
const element = entry.target as HTMLElement
const url = element.dataset.thumbUrl
if (url) element.style.backgroundImage = `url("${url}")`
obs.unobserve(element)
})
},
{ root: document.getElementById("lb-thumbs"), rootMargin: "300px" }
)
thumbs.forEach((thumb) => observer.observe(thumb))
},
}))
})
</script>
<style>
[x-cloak] { display: none !important; }
.no-scrollbar::-webkit-scrollbar { display: none; }
.no-scrollbar { -ms-overflow-style: none; scrollbar-width: none; }
/* 单图收藏爱心:默认描边,已收藏实心 */
.fav-btn svg { fill: none; }
.fav-btn.is-fav svg { fill: currentColor; }
/* ?img= 深链定位提示:短暂黑色描边闪烁 */
.locate-flash {
outline: 3px solid #111;
outline-offset: 4px;
}
/* 触屏没有 hover,收藏按钮常驻显示,否则永远点不到 */
@media (hover: none) {
.fav-btn { opacity: 1 !important; }
}
</style>