57 lines
2.5 KiB
Vue
57 lines
2.5 KiB
Vue
<template>
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<nav class="aa-anchor" :class="{ fixed }">
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<template v-for="(it, i) in items" :key="it.key">
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<button class="aa-anchor-item" :class="{ 'is-active': active === it.key }" @click="go(it.key)">{{ it.label }}</button>
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<div v-if="it.children" class="aa-anchor-sub">
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<button
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v-for="c in it.children" :key="c.key"
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class="aa-anchor-item" :class="{ 'is-active': active === c.key }"
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@click="go(c.key)"
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>{{ c.label }}</button>
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</div>
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</template>
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</nav>
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</template>
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<script setup>
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import { ref, onMounted, onBeforeUnmount } from 'vue';
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const props = defineProps({
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items: { type: Array, required: true }, // [{ key, label, children? }]（key 对应页面元素 id）
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fixed: { type: Boolean, default: false },
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offset: { type: Number, default: 24 } // 滚动偏移（避开吸顶高度）
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});
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const active = ref(props.items[0] ? props.items[0].key : '');
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const allKeys = [];
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(function collect(list) { list.forEach(i => { allKeys.push(i.key); if (i.children) collect(i.children); }); })(props.items);
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function go(key) {
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const el = document.getElementById(key);
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if (el) window.scrollTo({ top: el.getBoundingClientRect().top + window.scrollY - props.offset, behavior: 'smooth' });
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}
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function onScroll() {
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const pos = window.scrollY + 80;
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let cur = allKeys[0];
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for (const k of allKeys) {
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const el = document.getElementById(k);
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if (el && el.offsetTop <= pos) cur = k;
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}
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active.value = cur;
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}
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onMounted(() => window.addEventListener('scroll', onScroll));
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onBeforeUnmount(() => window.removeEventListener('scroll', onScroll));
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</script>
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<!-- 样式对齐 组件7.txt AnchorNav 规范 -->
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<style scoped>
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.aa-anchor { font-family: var(--font-family, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif); width: 160px; }
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.aa-anchor.fixed { position: fixed; right: 24px; top: 80px; }
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.aa-anchor-item { display: block; padding: 6px 12px; font-size: 13px; color: #8C8C8C; cursor: pointer; border-left: 2px solid #E8ECF1; line-height: 1.4; transition: color .15s, border-color .15s; background: none; border-top: none; border-right: none; border-bottom: none; text-align: left; width: 100%; }
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.aa-anchor-item:hover { color: #2F54EB; }
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.aa-anchor-item.is-active { color: #2F54EB; border-left-color: #2F54EB; font-weight: 500; }
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.aa-anchor-sub { padding-left: 8px; }
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.aa-anchor-sub .aa-anchor-item { border-left: none; padding-left: 20px; }
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.aa-anchor-sub .aa-anchor-item.is-active { border-left: 2px solid #2F54EB; }
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</style>
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