在这里插入图片描述

实现弹窗展示富文本数据,允许全文搜索高亮显示搜索内容


👉 前言

在 Vue + elementUi 开发中,遇到需要实现一个富文本展示 且 需要实现富文本全文搜索,高亮对应搜索内容。显示关键词出现次数,允许上下按顺序切换,实现滚动条定位到对应关键词位置!

接下来,简单阐述下,开发中使用方法!


👉 一、效果演示

话不多说,先上效果图! 白嫖万岁!当然,如果有帮助,希望不要吝啬你的点赞呀!

效果图
效果图二

以上数据来源于互联网记载的国内法律法规条例文献!

👉 二、实现思路

通过 v-html 将富文本解析到页面指定位置展示,并且预设的 class名称,通过 document.querySelectorAll() 查询已渲染到页面的内容。

通过正则 htmlContent.replace(new RegExp(this.keyword, 'g'), 替换内容)。替换内容,通常为html样式的keyword)

其实不难发现,在vueJavaScript 中进行全文搜索有些许不同。由于其中搜索的HTML是我们通过 v-html渲染 到页面上,它享有Vue数据双向绑定的特性,我们其实只需要对v-html绑定的变量参数进行修改,即可实时渲染到页面。当然有些标签属性变更,使用JavaScript来修改可能会更加高效一点。

稍微增加一点切换的滚动条挪动 及 样式清除细节逻辑!直接看代码吧! 简单易懂!

👉 三、实现案例

> 父组件中引用

<template>
<fullTextSearchDialog
	v-if="lawDialogVisible"
	ref="fullTextSearchDialog"
	:curTitle="curTitle"
	:content="lawFullText"
	@close="closeLawFullTextDialog"
/>
</template>

<script>
import fullTextSearchDialog from "@/views/components/dialog/fullTextSearchDialog.vue";

 data() {
    return {
      lawDialogVisible: false,
      curTitle: '',
      lawFullText: '',
    }
}
methods: {
	// 打开法律法规全文
    openLawFullTextDialog(item) {
      this.curTitle = item.title;
      this.lawFullText = item.fullText;
      this.lawDialogVisible = true
      setTimeout(() => {
        this.$refs.fullTextSearchDialog.openDialog()
      }, 0)
    },
    // 关闭全文弹窗
    closeLawFullTextDialog() {
      this.curTitle = '';
      this.lawFullText = ''
      this.lawDialogVisible = false
    },
}
</script>

> 子组件模板

<template>
  <el-dialog
    :title="curTitle + '-全文'"
    :visible.sync="lawDialogVisible"
    width="61.7%"
    height="500"
    :close-on-click-modal="true"
    :modal="false"
    custom-class="abolishDialog"
    @close="handleClose"
  >
    <div class="lawContent">
      <div class="searchBox">
        全文内容搜索:
        <el-input
          placeholder="请输入关键词"
          v-model="keyword"
          class="input-with-select"
          :clearable="false"
          style="width: calc(100% - 240px);"
        >
          <div class="indexChange" slot="suffix">
            <span class="index">{{ searchIndex + ' / ' + searchAllIndexs }}</span>
            <div class="btnBox">
              <i class="el-icon-arrow-up" @click="searchIndexDown"></i>
              <i class="el-icon-arrow-down" @click="searchIndexUp"></i>
            </div>
          </div>
        </el-input>
        <el-button type="primary" size="mini" @click="lawFullTextSearch"
          >查 询</el-button
        >
        <el-button size="mini" @click="resetSearch(true)"
          >重 置</el-button
        >
      </div>
      <div class="fullTextContent">
        <p
          v-if="refresh"
          style="
            width: 100%;
          "
          v-html="lawFullText || '暂无数据'"
          class="el-tiptap-editor__content"
        ></p>
      </div>
    </div>
  </el-dialog>
</template>


<script>
export default {
  components: {},
  props: {
    curTitle: {
      type: String,
      default: () => {
        return '提示';
      },
    },
    content: {
      type: String,
      default: () => {
        return '';
      },
    },
  },
  data() {
    return {
      lawDialogVisible: false, //弹框显隐
      lawFullText: '',
      searchIndex: 0,
      searchAllIndexs: 0,
      keyword: '',
      refresh: true,
    };
  },
  
  mounted() {
    this.lawFullText = JSON.parse(JSON.stringify(this.content))
  },
  watch: {},
  computed: {},

  methods: {
    /**
     * @description:打开弹框回调
     */
    openDialog() {
      this.lawDialogVisible = true;
    },
    
    // 法律法规全文内容关键词搜索高亮
    lawFullTextSearch() {
      // window.console.log(this.keyword)
      if (this.keyword && this.keyword !== '' && this.lawFullText.indexOf(this.keyword) != -1) {
        this.searchAllIndexs = (this.lawFullText.split(this.keyword).length - 1) || 0
        this.searchIndex = 1
        this.lawFullText = this.lawFullText.replace(new RegExp(this.keyword, 'g'), `<em class='searchText'>${this.keyword}</em>`); // 通过正则全局匹配关键字,查出来的文字进行高亮替换
        setTimeout(() => {
          let allSearchIndex = document.querySelectorAll('em')
          allSearchIndex[this.searchIndex - 1].className = 'curSearchText'
          // 使滚动条滚动到指定位置
          this.scrollChange()
        }, 0)
      } else {
        this.resetSearch()
        this.$message.info('无当前查询内容 或 未输入关键词!')
      }
    },
    
    // 重置搜索内容
    resetSearch(resetKey = false) {
      if(resetKey) {
        this.keyword = ''
      }
      this.searchAllIndexs = 0;
      this.searchIndex = 0;
      // 清除上次的查询记录
      this.lawFullText = this.lawFullText.replace(new RegExp('</?em.*?>', 'gi'), ``);
      // 刷新
      this.refresh = false;
      setTimeout(() => {
        this.refresh = true;
      }, 0)
    },
    
    // 查询内容上一个
    searchIndexUp() {
      if(this.searchIndex > 0 && this.searchIndex <= this.searchAllIndexs && this.searchAllIndexs > 0) {
        this.searchIndex = (this.searchIndex + 1) > this.searchAllIndexs ? 1 : (this.searchIndex + 1)
        setTimeout(() => {
          let allSearchIndex = document.querySelectorAll('em')
          // 清除上一个选中样式
          allSearchIndex[this.searchIndex - 2 < 0 ? this.searchAllIndexs - this.searchIndex : this.searchIndex - 2].className = 'searchText'
          allSearchIndex[this.searchIndex - 1].className = 'curSearchText'
          
          // 使滚动条滚动到指定位置
          this.scrollChange()
        }, 0)
      } else {
        this.searchIndex = 0
      }
    },
    
    // 查询内容下一个
    searchIndexDown() {
      if(this.searchIndex > 0 && this.searchIndex <= this.searchAllIndexs && this.searchAllIndexs > 0) {
        this.searchIndex = (this.searchIndex - 1) <= 0 ? this.searchAllIndexs : (this.searchIndex - 1)
        setTimeout(() => {
          let allSearchIndex = document.querySelectorAll('em')
          // 清除上一个选中样式
          allSearchIndex[this.searchIndex > this.searchAllIndexs - 1 ? this.searchAllIndexs - this.searchIndex  : this.searchIndex].className = 'searchText'
          allSearchIndex[this.searchIndex - 1].className = 'curSearchText'
          
          // 使滚动条滚动到指定位置
          this.scrollChange()
        }, 0)
      } else {
        this.searchIndex = 0
      }
    },
    
    /**
     * @description:关闭弹框回调
     */
    handleClose() {
      this.lawDialogVisible = false;
      setTimeout(() => {
        this.lawFullText = ''
        this.keyword = ''
        this.searchIndex = 0
        this.searchAllIndexs = 0
        this.$emit('close')
      }, 0)
    },
    
    // 滚动条定位
    scrollChange() {
      let fullTextDom = document.querySelector('.fullTextContent')
      let curDom = document.querySelector('.curSearchText').parentNode
      // window.console.log(curDom, curDom.offsetTop)
      fullTextDom.scrollTop = curDom.offsetTop - 137  || 0
    },
  },
};
</script>

<style lang="scss" scoped>
/deep/ {
  .abolishDialog {
    background: #ffffff !important;
    border: 1px solid #cccccc !important;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    border-radius: 4px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    margin-top: 0 !important;
    min-width: 480px;
    .lawContent {
      height: 50vh;
      min-height: 500px;
      display: flex;
      align-content: space-around;
      flex-wrap: wrap;
      .searchBox {
        width: 100%;
        display: flex;
        justify-content: space-around;
        align-items: center;
        .el-input__inner {
          padding-right: 100px;
        }
        .el-input__suffix-inner {
          width: 90px;
          display: flex;
          justify-content: space-between;
          .indexChange {
            width: 100%;
            display: flex;
            justify-content: space-around;
            align-items: center;
            .btnBox {
              display: flex;
              flex-direction: column;
              margin: 0 5px;
            }
          }
        }
      }
      .fullTextContent {
        width: 100%;
        height: calc(100% - 70px);
        padding-top: 20px;
        overflow-y: auto;
        .searchText {
          background-color: yellow;
          color: #333;
          font-weight: bold;
          margin: 0 3px;
          padding: 2px;
          border-radius: 5px;
        }
        .curSearchText {
          background-color: red;
          color:white;
          padding: 3px;
          font-weight: bold;
          margin: 0 3px;
          padding: 2px;
          border-radius: 5px;
        }
      }
    }
    .el-dialog__header {
      border-bottom: 0.5px solid #cccccc !important;
      padding: 0 15px;
      font-weight: bold;
      display: flex;
      align-items: center;
      justify-content: space-between;
      .el-dialog__headerbtn {
        width: 20px;
        position: relative;
        top: 0;
        right: 0;
      }
      // height: 48px !important;
    }
    .el-dialog__body {
      // min-height: 100px;
      padding: 15px;
      .title {
        font-size: 10.5px;
        color: #f56c6c;
        text-align: right;
        margin-top: 15px;
      }
    }
    .el-dialog__footer {
      border-top: 0.5px solid #cccccc !important;
      padding: 10px;
    }
  }
}
</style>

案例较为粗浅,仅供参考!

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