＜ vue + ElementUi 组件封装：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！

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vue和 JavaScript 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>
<fullTextSearchDialogv-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 = truesetTimeout(() => {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-inputplaceholder="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"><pv-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) || 0this.searchIndex = 1this.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 = 0this.searchAllIndexs = 0this.$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！

👍 卷王必胜！

如果本篇文章对您有所帮助！ 请不要吝惜您的小手，给小温来个小小的点赞！您的支持是对小温无比的认同！

---

往期内容 💨

🔥 ＜ 每日算法：一文带你认识 “ 双指针算法 ” ＞

🔥 ＜ 每日小技巧： 基于Vue状态的过渡动画 - Transition 和 TransitionGroup＞

🔥 ＜ JavaScript技术分享： 大文件切片上传 及 断点续传思路 ＞

🔥 ＜ 每日份知识快餐：axios是什么？如何在Vue中 封装 axios ？ ＞

🔥 ＜ 面试知识点：什么是 Node.js ？有哪些优缺点？应用场景？ ＞