64 lines
2.7 KiB
Plaintext
64 lines
2.7 KiB
Plaintext
<template>
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<nav class="kole-anchor" :class="{ fixed }">
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<!-- Vue 2 不允许在 <template v-for> 上写 :key，key 必须落在真实元素上 -->
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<template v-for="(it, i) in items">
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<button :key="'item-' + it.key" class="kole-anchor-item" :class="{ 'is-active': active === it.key }" @click="go(it.key)">{{ it.label }}</button>
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<div v-if="it.children" :key="'sub-' + it.key" class="kole-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="kole-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>
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export default {
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name: 'KoleAnchorNav',
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props: {
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items: { type: Array, required: true }, // [{ key, label, children? }]
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fixed: { type: Boolean, default: false },
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offset: { type: Number, default: 24 }
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},
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data() { return { active: this.items[0] ? this.items[0].key : '' }; },
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computed: {
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allKeys() {
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const out = [];
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(function collect(list) { list.forEach(i => { out.push(i.key); if (i.children) collect(i.children); }); })(this.items);
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return out;
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}
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},
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methods: {
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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 - this.offset, behavior: 'smooth' });
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},
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onScroll() {
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const pos = window.scrollY + 80;
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let cur = this.allKeys[0];
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for (const k of this.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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this.active = cur;
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}
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},
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mounted() { window.addEventListener('scroll', this.onScroll); },
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beforeDestroy() { window.removeEventListener('scroll', this.onScroll); }
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};
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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>
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.kole-anchor { font-family: var(--font-family, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif); width: 160px; }
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.kole-anchor.fixed { position: fixed; right: 24px; top: 80px; }
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.kole-anchor-item { display: block; padding: 6px 12px; font-size: 13px; color: #6E6E6E; 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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.kole-anchor-item:hover { color: #2F54EB; }
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.kole-anchor-item.is-active { color: #2F54EB; border-left-color: #2F54EB; font-weight: 500; }
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.kole-anchor-sub { padding-left: 8px; }
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.kole-anchor-sub .kole-anchor-item { border-left: none; padding-left: 20px; }
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.kole-anchor-sub .kole-anchor-item.is-active { border-left: 2px solid #2F54EB; }
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</style>
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