固定比例

padding实现

<template>
  <view class="outter" :style="outerRatioStyle">
    <view class="inner">
      <slot></slot>
    </view>
  </view>
</template>
<script>
export default {
  name: 'aspect-ratio',
  data () {
    return {}
  },
  props: {
    ratio: {
      type: Number
    }
  },
  computed: {
    outerRatioStyle () {
      let ratio = this.ratio
      if (ratio == null || Number.isNaN(ratio)) {
        ratio = 100
      }
      if (typeof ratio !== 'string' || !ratio.endsWith('%')) {
        ratio = ratio + '%'
      }
      return `padding-top: ${ratio}`
    }
  }
}
</script>
<style lang="scss" scoped>
.outter {
  position: relative;
  width: 100%;
  height: 0;
  .inner {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
  }
}
</style>

aspect-ratio实现

/* 高度随动 */
.box1 {
  width: 100%;
  height: auto;
  aspect-ratio: 16/9;
}
/* 宽度随动 */
.box2 {
  height: 100%;
  width: auto;
  aspect-ratio: 16/9;
}

代码预览+复制

子组件

<template>
  <div class="pre-code-wrap hljs">
    <div class="pre-tips">
      <span class="lang">{{props.lang}}</span>
      <span class="btn" data-clipboard-action="copy" :data-clipboard-target="'#highlight-'+idName" @click="copyCode">{{props.btn}}</span>
    </div>
    <pre v-highlight :class="props.lang" :id="'highlight-'+idName"><code><slot></slot></code></pre>
  </div>
  <teleport to="body">
    <div class="is-copy sus" v-if="success">{{props.tips[0]}}</div>
    <div class="is-copy err" v-if="error">{{props.tips[1]}}</div>
  </teleport>
</template>
<script>
import hljs from "highlight.js"
export default {
  // 自定义指令
  directives: {
    highlight: {
      deep: true,
      beforeMount (el, binding) {
        let targets = el.querySelectorAll("code")
        targets.forEach((target) => {
          if (typeof binding.value === "string") {
            target.textContent = binding.value
          }
          hljs.highlightElement(target)
        })
      },
      updated (el, binding) {
        let targets = el.querySelectorAll("code")
        targets.forEach((target) => {
          if (typeof binding.value === "string") {
            target.textContent = binding.value
            hljs.highlightElement(target)
          }
        })
      }
    }
  }
}
</script>
<script setup>
import Clipboard from 'clipboard';
import { defineProps, defineEmits, ref } from 'vue';
// 定义参数
const props = defineProps({
  lang: {
    type: String,
    default: 'js'
  },
  btn: {
    type: String,
    default: '复制代码'
  },
  tips: {
    type: Array,
    default: () => ['代码复制成功', '该浏览器不支持自动复制'],
    validator: (value) => {
      return value.length >= 2
    }
  }
})
// 传递事件声明
const emits = defineEmits(['on-copy'])
// 数据
const success = ref(false)
const error = ref(false)
// 不重复id
const idName = Math.random().toString(36).slice(-8)
// 事件
const copyCode = () => {
  const clipboard = new Clipboard('.btn')
  clipboard.on('success', (e) => {
    success.value = true
    setTimeout(() => {
      success.value = false
    }, 3000);
    clipboard.destroy();
    e.clearSelection();
    emits('on-copy', 'success')
  })
  clipboard.on('error', (e) => {
    error.value = true
    setTimeout(() => {
      error.value = false
    }, 3000);
    clipboard.destroy()
    e.clearSelection();
    emits('on-copy', 'error')
  })
}
</script>
<style lang="scss" scoped>
.pre-code-wrap {
  position: relative;
  width: 100%;
}
.pre-tips {
  font-size: 12px;
  line-height: 1;
  position: absolute;
  top: 4px;
  right: 4px;
  user-select: none;
}
.lang {
  margin-right: 10px;
  opacity: 0.4;
}
.btn {
  cursor: pointer;
  opacity: 0.4;
  &:hover {
    opacity: 1;
  }
}
.is-copy {
  line-height: 1.2;
  line-height: 1.2;
  position: fixed;
  z-index: 1000;
  top: 20px;
  right: 20px;
  padding: 10px 20px;
}
.sus {
  color: #67c23a;
  border: 1px solid #67c23a;
  background-color: #f0f9eb;
}
.err {
  color: #f56c6c;
  border: 1px solid #f56c6c;
  background-color: #fef0f0;
}
</style>

父组件

<template>
  <pre-code lang="js">{{js}}</pre-code>
  <br />
  <pre-code lang="scss" theme="dark" :tips="['成功','失败']" btn="复制">{{scss}}</pre-code>
</template>

<script setup>
import { ref } from '@vue/reactivity';
import preCode from './../components/pre.vue';


const scss = ref(
  `.pre-code-wrap {
  position: relative;
  .copy-btn {
    font-size: 12px;
    line-height: 1;
    position: absolute;
    top: 4px;
    right: 4px;
    cursor: pointer;
  }
}
.is-copy-tips {
  line-height: 1.2;
  position: fixed;
  z-index: 1000;
  top: 20px;
  right: 20px;
  padding: 10px 20px;
  color: #67c23a;
  border: 1px solid #67c23a;
  background-color: #f0f9eb;
}`)

const js = ref(
  `import { createApp } from "vue"
import App from "./App.vue"
import router from "./router"
import store from "./store"

import ElementPlus from "element-plus"
import zhCn from "element-plus/es/locale/lang/zh-cn"
import "element-plus/dist/index.css"


import "./assets/css/reset.css"
const app = createApp(App)

app.use(store)
app.use(router)
app.use(ElementPlus, { locale: zhCn })
app.mount("#app")
`)
</script>

<style src="highlight.js/styles/atom-one-light.css"></style>

锚点-滚动定位

<template>
  <div class="page">
    <ul class="title">
      <li :class="{'active':active==index}" v-for="(li,index) in titleData" :key="li" @click="goAnchor(li,index)">{{li}}</li>
    </ul>
    <ul class="item-wrap" @scroll="changeScroll">
      <li class="item" v-for="li in titleData" :key="li" :id="li">
        <h2>{{li}}</h2>
        <p v-for="i in 100" :key="i">{{li}}-{{i}}</p>
      </li>
    </ul>
  </div>
</template>

<script setup>
import { getCurrentInstance, ref, onMounted, reactive } from 'vue';
const { proxy } = getCurrentInstance()

let active = ref(0)
const titleData = reactive(['Anchor1', 'Anchor2', 'Anchor3', 'Anchor4'])

// 点击锚点
const goAnchor = (name, index) => {
  document.querySelector('#' + name).scrollIntoView({ behavior: "smooth" })
}

// 监听滚动事件
const changeScroll = () => {
  const boxElList = document.querySelectorAll('.item');
  boxElList.forEach((el) => {
    isView.observe(el);
  })
}

// 监听是否在可视区域
const isView = new IntersectionObserver((entries) => {
  entries.forEach(entry => {
    if (entry.intersectionRatio > 0) {
      let key = titleData.findIndex((e) => e == entry.target.id)
      active.value = key
    }
  })
})
</script>

<style lang='scss' scoped>
.page {
  position: relative;
}
.title {
  font-size: 20px;
  position: sticky;
  top: 0;
  left: 0;
  display: flex;
  align-items: center;
  flex-direction: row;
  width: 100%;
  border-bottom: 1px solid #000;
  background-color: #fff;
  li {
    padding: 0 20px;
    cursor: pointer;
  }
  .active {
    color: #fff;
    background-color: #fc0;
  }
}
.item-wrap {
  overflow-y: auto;
  height: 500px;
  .item {
    padding-top: 10px;
  }
}
</style>