参考文章，非常感谢大佬的分享
实现可高亮的输入框 — HighlightTextarea
GitHub:highlight-textarea

可看作者上一篇文章
若依 ruoyi-vue SpringBoot聊天敏感词过滤sensitive-word（一）

效果图

审核时，输入框高亮敏感词，并且能编辑

前端代码

列表高亮

      <el-table-column
        label="标题"
        align="center"
        prop="publishTitle"
        :show-overflow-tooltip="true"
      >
        <template slot-scope="scope">
          <span v-html="highlightPublishTitle(scope.row)"></span>
        </template>
      </el-table-column>

    highlightPublishTitle(row){
      let text = row.publishTitle
      for (const word of row.titleSensitiveWord) {
        const regex = new RegExp(word, 'g')
        text = text.replace(regex, `<span style="color: red;">${word}</span>`)
      }
      return text
    },

编辑表单输入框高亮

        <el-form-item label="标题" prop="publishTitle">
          <highlight-textarea
            v-if="open"
            style="width: 100%;"
            placeholder="请输入"
            :text="form.publishTitle"
            type="input"
            @change="(value) => {
              form.publishTitle = value
            }"
            :highlightKey="form.titleSensitiveWord">
          </highlight-textarea>
        </el-form-item>

引用组件

import HighlightTextarea from '@/components/HighlightTextarea/index.vue';

components: { HighlightTextarea },

npm安装

npm install less@^4.2.0 less-loader@^7.3.0

组件

<template>
  <div class="highlight-box">
    <template v-if="type === 'textarea'">
      <div v-if="value"
           class="textarea-outer"
           ref="textareaOuter"
           :style="{'height': `${maxHeight}px`}">
        <div ref="outerInner" class="outer-inner"
             v-html="highlightHtml(value)">
        </div>
      </div>
      <textarea
        ref="textareaBox"
        :style="{'height': `${maxHeight}px`}"
        :placeholder="placeholder"
        @keyup.enter="syncScrollTop"
        v-model.trim="value">
            </textarea>
    </template>
    <template v-if="type === 'input'">
      <div v-if="value"
           class="input-outer"
           v-html="highlightHtml(value)">
      </div>
      <input type="text"
             :placeholder="placeholder"
             v-model.trim="value"/>
    </template>
  </div>
</template>

<script>
export default {
  name: 'HighlightTextarea',
  data() {
    return {
      value: ''
    }
  },
  props: {
    placeholder: {
      type: String,
      required: false,
      default: '请输入'
    },
    text: {
      type: String,
      required: false,
      default: ''
    },
    highlightKey: {
      type: Array,
      require: false,
      default: () => []
    },
    type: {
      type: String,
      required: true,
      default: 'textarea'
    },
    maxHeight: {
      type: Number,
      required: false,
      default: 220
    }
  },
  created() {
    this.value = this.text.replace(/(^\s*)|(\s*$)/g, '').replace(/<br \/>|<br\/>|<br>/g, '\n')
  },
  mounted() {
    this.scrollMousewheel()
  },
  computed: {},
  watch: {
    value(newValue) {
      this.$emit('change', newValue)
    }
  },
  methods: {
    highlightHtml(str) {
      if ((!str || !this.highlightKey || this.highlightKey.length === 0) && this.type !== 'textarea') {
        return str
      }
      let rebuild = str
      if (this.highlightKey.filter(item => ~str.indexOf(item)).length) {
        let regStr = ''
        let regExp = null
        this.highlightKey.forEach(list => {
          regStr = this.escapeString(list)
          regExp = new RegExp(regStr, 'g')
          rebuild = rebuild.replace(regExp, `<span>${list}</span>`)
        })
      }
      if (this.type === 'textarea') {
        rebuild = rebuild.replace(/\n/g, '<br/>').replace(/\s/g, '&nbsp;')
        // textarea有滚动条时，div底部不能和textarea重合，故加一个<br/>
        const wrap = this.$refs.textareaBox
        if (wrap && wrap.scrollHeight > this.maxHeight) {
          rebuild = rebuild + '<br/>'
        }
      }
      return rebuild
    },
    syncScrollTop() {
      const wrap = this.$refs.textareaBox
      const outerWrap = this.$refs.textareaOuter
      const outerInner = this.$refs.outerInner
      if (wrap.scrollHeight > this.maxHeight && outerInner.scrollHeight !== wrap.scrollHeight) {
        outerInner.style.height = `${wrap.scrollHeight}px`
      }
      if (wrap.scrollTop !== outerWrap.scrollTop) {
        outerWrap.scrollTop = wrap.scrollTop
      }
    },
    scrollMousewheel() {
      if (this.type === 'input') {
        return
      }
      this.$nextTick(() => {
        this.eventHandler('add')
      })
    },
    // 处理字符串中可能对正则有影响的字符
    escapeString(value) {
      const characterss = ['(', ')', '[', ']', '{', '}', '^', '$', '|', '?', '*', '+', '.']
      let str = value.replace(new RegExp('\\\\', 'g'), '\\\\')
      characterss.forEach(function(characters) {
        let r = new RegExp('\\' + characters, 'g')
        str = str.replace(r, '\\' + characters)
      })
      return str
    },
    eventHandler(type) {
      const wrap = this.$refs.textareaBox
      if (wrap) {
        let mousewheelevt = (/Firefox/i.test(navigator.userAgent))
          ? 'DOMMouseScroll' : 'mousewheel'
        wrap[`${type}EventListener`](mousewheelevt, this.syncScrollTop)
        wrap[`${type}EventListener`]('scroll', this.syncScrollTop)
      }
    }
  },
  destroyed() {
    this.eventHandler('remove')
  }
}
</script>

<style lang="less">
@width: 500px;
.highlight-box {
  font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
  position: relative;
  display: flex;
  font-size: 12px;
  width: @width;
  position: relative;
  color: #333333;
  background: #ffffff;
  border-radius: 5px;
  overflow: hidden;

  .textarea-outer,
  .input-outer {
    box-sizing: border-box;
    width: @width;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    border: 1px solid transparent;
    border-top: 0;
    // 鼠标事件失效 ie6-10不支持
    pointer-events: none;
    cursor: text;

    span {
      color: #F27C49;
    }

    &:hover {
      border-color: #4C84FF;
    }
  }

  .textarea-outer {
    overflow-y: auto;
    line-height: 20px;
    word-break: break-all;

    .outer-inner {
      padding: 5px 8px;
      width: 100%;
      box-sizing: border-box;
    }
  }

  textarea {
    width: @width;
    line-height: 20px;
    resize: none;
  }

  .input-outer,
  input {
    width: @width;
    height: 28px;
    line-height: 28px;
  }

  .input-outer {
    bottom: 0;
    padding: 0 8px;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
  }

  textarea,
  input {
    font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
    font-size: 12px;
    // position: relative;
    // z-index: 2;
    // 光标的颜色
    color: #333333;
    // 文本颜色
    text-shadow: 0 0 0 rgba(0, 0, 0, 0);
    -webkit-text-fill-color: transparent;
    background: transparent;
    border-radius: 5px;
    border: 1px solid #E0E0E0;
    padding: 4px 8px;
    box-sizing: border-box;

    &::placeholder {
      -webkit-text-fill-color: #999999;
    }

    &:hover {
      border-color: #4C84FF;
    }

    &:focus {
      border-color: #4C84FF;
      box-shadow: 0 0 0 2px #DBE4FF;
      outline: none;
    }
  }
}
</style>

后端代码

触发敏感词记录

 /**
     * 敏感词检查
     *
     */
    public void sensitiveWordCheck(SubPublishing subPublishing) {
        List<TzLySensitiveWordRecord> recordList = new ArrayList<>();
        Date nowDate = DateUtils.getNowDate();
        //找出标题的敏感词
        List<String> titleList = SensitiveWordHelper.findAll(subPublishing.getPublishTitle());

        TzLySensitiveWordRecord dbTitle = sensitiveWordRecordService
                .selectTzLySensitiveWordRecordByMessageIdAndSource(subPublishing.getId(), HYZR_TITLE);
        //插入
        if (ObjectUtil.isNull(dbTitle) && CollectionUtils.isNotEmpty(titleList)) {
            TzLySensitiveWordRecord record = new TzLySensitiveWordRecord();
            record.setWordId(null);// 敏感词ID
            record.setWord(StrUtil.join(",", titleList)); //敏感词
            record.setMessageId(subPublishing.getId());// 主键ID
            record.setUserId(Long.valueOf(subPublishing.getCreatorId()));// 发送人ID
            record.setUserName(subPublishing.getCreatorName());// 发送人姓名
            record.setMobile(subPublishing.getCreatorTel());// 发送人手机号
            record.setSendTime(nowDate);// 发送时间
            record.setIsDeleted(0);// 是否删除
            record.setCreatedDate(nowDate);// 创建时间
            record.setCreatedBy(Long.valueOf(subPublishing.getCreatorId()));// 创建人
            record.setSource(HYZR_TITLE);//消息来源 会员值日
            record.setMessage(subPublishing.getPublishTitle()); //记录实际发送消息
            record.setReplaceMessage(subPublishing.getPublishTitle()); //记录替换的消息
            recordList.add(record);
            //更新
        } else if (ObjectUtil.isNotNull(dbTitle)) {
            dbTitle.setWord(StrUtil.join(",", titleList)); //敏感词
            dbTitle.setLastModifiedDate(nowDate);// 修改时间
            dbTitle.setLastModifiedBy(Long.valueOf(subPublishing.getCreatorId()));// 修改人
            dbTitle.setMessage(subPublishing.getPublishTitle()); //记录实际发送消息
            dbTitle.setReplaceMessage(subPublishing.getPublishTitle()); //记录替换的消息
            recordList.add( dbTitle);
        }

        TzLySensitiveWordRecord dbContent = sensitiveWordRecordService
                .selectTzLySensitiveWordRecordByMessageIdAndSource(subPublishing.getId(), HYZR_CONTENT);
        if (CollectionUtils.isNotEmpty(recordList)) {
            sensitiveWordRecordService.saveOrUpdateBatch(recordList);
        }
    }

回显敏感词记录

        SubPublishing subPublishing = this.getById(id);
        //查询是否触发敏感词
        Map<String, TzLySensitiveWordRecord> sensitiveWordRecordMap = sensitiveWordRecordService.selectListByMessageId(id)
                .stream().collect(Collectors.toMap(TzLySensitiveWordRecord::getSource, o -> o));
        if (!sensitiveWordRecordMap.isEmpty()) {
            TzLySensitiveWordRecord title = sensitiveWordRecordMap.get(HYZR_TITLE);
            if (ObjectUtil.isNotNull(title)) {
                subPublishing.setTitleSensitiveWord(StrUtil.split(title.getWord(), ","));
            }