vue雙向錨點(diǎn)實(shí)現(xiàn)過程簡易版(scrollIntoView)

更新時間：2024年07月24日 09:31:12 作者：Lemon今天學(xué)習(xí)了嗎

這篇文章主要介紹了vue雙向錨點(diǎn)實(shí)現(xiàn)過程簡易版(scrollIntoView),具有很好的參考價值,希望對大家有所幫助,如有錯誤或未考慮完全的地方,望不吝賜教

一、需求

左邊是內(nèi)容板塊，右邊是目錄結(jié)構(gòu)，點(diǎn)擊右邊內(nèi)容跳轉(zhuǎn)到左邊相應(yīng)位置展示，滑動左邊內(nèi)容右邊目錄自動跳轉(zhuǎn)。

二、實(shí)現(xiàn)

左邊每一個內(nèi)容模塊都給一個ref和應(yīng)該相同的class類名，方便獲取dom；
左邊內(nèi)容區(qū)域使用滑動事件@scroll="handleScroll"，內(nèi)容區(qū)域滑動即觸發(fā)該方法；
右邊使用點(diǎn)擊事件@click="goAnchor('anchor-' + index, index)"獲取當(dāng)前點(diǎn)擊的dom；

handleScroll() 滾動監(jiān)聽方法實(shí)現(xiàn)滑動左邊內(nèi)容對應(yīng)上右邊目錄

goAnchor() 右邊錨點(diǎn)選中跳轉(zhuǎn)相應(yīng)內(nèi)容區(qū)域，通過scrollIntoView({ behavior: 'smooth' })平滑跳轉(zhuǎn)

實(shí)現(xiàn)代碼

<template>
  <div class="panel-block flex">
    <div class="panel-left" ref="anchorRef" @scroll="handleScroll">
      <div class="panel-item anchor-item" ref="anchor-0">
        <div class="panel-item-title">內(nèi)容區(qū)域1</div>
        xxx
      </div>
     <div class="panel-item anchor-item" ref="anchor-1">
        <div class="panel-item-title">內(nèi)容區(qū)域2</div>
        xxx
      </div>
      <div class="panel-item anchor-item" ref="anchor-2">
        <div class="panel-item-title">內(nèi)容區(qū)域3</div>
        <div class="panel-item-content">
         xxx
        </div>
      </div>
      <div class="panel-item anchor-item" ref="anchor-3">
        <div class="panel-item-title">內(nèi)容區(qū)域4</div>
        <div class="panel-item-content">
         xxx
        </div>
      </div>
    </div>
    <div class="panel-right">
      <div class="step-line"></div>
      <ul class="step-ul">
        <li
          class="flex_align_item_center"
          v-for="(item, index) in stepData"
          :key="index"
          :class="{ 'step-active': activeBtn == index }"
          @click="goAnchor('anchor-' + index, index)"
        >
          <div class="step-icon"></div>
          <div class="step-label">{{ item }}</div>
        </li>
      </ul>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      activeBtn: 0, //錨點(diǎn)按鈕
      stepData: ['區(qū)域1', '區(qū)域2', '區(qū)域3', '區(qū)域4'],
      contentDiv: null, //錨點(diǎn)區(qū)域
    }
  },
  methods: {
    //錨點(diǎn)跳轉(zhuǎn)
    goAnchor(selector, index) {
      this.activeBtn = index
      this.$refs[selector].scrollIntoView({ behavior: 'smooth' })
    },
    // 滾動監(jiān)聽器
    handleScroll(i) {
      // 獲取所有錨點(diǎn)元素
      const navContents = document.querySelectorAll('.anchor-item')
      // 所有錨點(diǎn)元素的 offsetTop
      const offsetTopArr = []
      navContents.forEach((item) => {
        offsetTopArr.push(item.offsetTop)
      })
      // 獲取當(dāng)前文檔流的 scrollTop
      const scrollTop = this.$refs.anchorRef.scrollTop
      offsetTopArr.forEach((item, index) => {
        if (scrollTop >= item) {
          this.activeBtn = index
        }
      })
    },
  }
}
</script>

-----------------以下為樣式代碼----------------------
<style lang="scss" scoped>
.panel-block {
    height: 100%;
    .panel-left {
      width: calc(100% - 180px);
      overflow-y: auto;
      height: 100%;
      .panel-item {
        .panel-item-content {
          padding: 10px;
          border-top: 0;
          min-height: 40px;
          .table-params {
            .table-header {
              height: 40px;
              line-height: 40px;
              width: 100%;
              border: 1px solid #ebeef5;
              border-bottom: none;
              background: #f5f7fa;
              font-weight: 700;
              font-size: 14px;
              color: #303133;
              padding-left: 15px;
            }
            .table-body-type {
              height: 32px;
              line-height: 32px;
              width: 100%;
              border: 1px solid #ebeef5;
              border-bottom: none;
              color: #303133;
              padding-left: 15px;
              .type-title {
                font-weight: 700;
                font-size: 12px;
              }
            }
          }
        }
      }
    }
    .panel-right {
      padding-top: 10px;
      position: fixed;
      left: calc(100% - 210px);
      .step-line {
        position: absolute;
        left: 6px;
        top: 0;
        width: 1px;
        background: #dcdfe6;
        height: calc(50vh - 85px);
        z-index: 0;
      }
      .step-ul {
        li {
          padding-bottom: 20px;
          .step-icon {
            width: 13px;
            height: 13px;
            margin-right: 20px;
            border-radius: 50%;
            z-index: 1;
          }
          .step-label {
            font-weight: 700;
            font-size: 14px;
            line-height: 22px;
            color: #303133;
          }
        }
        .step-active {
          .step-icon {
            border: 1px solid #1989fe;
            background: #fff;
          }
          .step-label {
            color: #1989fe;
          }
        }
      }
    }
    ::-webkit-scrollbar {
      width: 0 !important;
    }
  }
</style>