vue 搜索框模糊查询 + 优化(节流) + 关键字高亮

实际效果：

防抖

事件响应函数在一段时间后才执行，如果在这段时间内再次调用，则重新计算执行时间；当预定的时间内没有再次调用该函数，则执行doSomeThing方法。

应用场景：

1. scroll事件滚动触发
2. 搜索框输入查询
3. 表单验证
4. 按钮提交事件
5. 浏览器窗口缩放，resize事件

节流

如果你触发事件，每隔一段时间，只执行一次事件。

<template>
  <div class="wrapper">
    <van-nav-bar title="党员组织关系转入" />
    <van-form @submit="onSubmit">
      <van-cell-group>
        <div class="label"><span class="require">*</span>转入党支部</div>
        <div class="van-search-wrapper">
          <van-search
            v-model="newParty"
            placeholder="请输入搜索关键词"
            @input="partySearch"
          />
          <ul class="van-search-list" v-if="showNewPartyList">
            <li
              class="van-search-item"
              v-for="item in newPartyList"
              :key="item.orgId"
              @click="selectNewParty(item)"
              v-html="item.orgFullName"
            ></li>
          </ul>
        </div>

        <div class="label"><span class="require">*</span>介绍信</div>
        <van-uploader>
          <div class="upload-box"><i class="icon-upload"></i>上传文件</div>
        </van-uploader>
      </van-cell-group>
      <div style="margin: 16px">
        <van-button round block type="danger" native-type="submit"
          >提交</van-button
        >
      </div>
    </van-form>
  </div>
</template>

<script>
export default {
  data() {
    return {
      newParty: "",
      newPartyList: [],
      showNewPartyList: false,
    };
  },
  methods: {
    debounce(fn, delay) {
      let t = null;
      return function () {
        if (t !== null) {
          clearTimeout(t);
        }
        t = setTimeout(() => {
          fn();
        }, delay);
      };
    },
    partySearch() {
      this.debounce(this.newPartySearch(), 1000);
    },
    async newPartySearch() {
      // 防抖操作
      let { data } = await this.$http.get(
        "/party/h5/transfer/in/getPartyOrgData",
        {
          params: {
            orgFullName: this.newParty,
          },
        }
      );
      if (data.code === 200) {
        this.newPartyList = data.data;
        if (this.newPartyList && this.newPartyList.length > 0) {
          this.showNewPartyList = true;
          // 高亮搜索词
          this.newPartyList.map((item) => {
            item.orgFullName = this.brightKeyword(item.orgFullName);
          });
        } else {
          this.showNewPartyList = false;
        }
      }
    },
    brightKeyword(val) {
      const keyword = this.newParty;
      if (val.indexOf(keyword) > -1) {
        // replace() 方法用于在字符串中用一些字符替换另一些字符，或替换一个与正则表达式匹配的子串。
        return val.replace(keyword, `<span class="red">${keyword}</span>`);
      } else {
        return val;
      }
    },
    deleteBrightKeyword(val) {
      const keyword = this.newParty;
      if (val.indexOf(keyword) > -1) {
        // replace() 方法用于在字符串中用一些字符替换另一些字符，或替换一个与正则表达式匹配的子串。
        return val.replace(`<span class="red">${keyword}</span>`, keyword);
      } else {
        return val;
      }
    },
    selectNewParty(item) {
      this.newParty = this.deleteBrightKeyword(item.orgFullName);
      this.showNewPartyList = false;
    },
    onSubmit(values) {
      console.log("submit", values);
    },
  },
};
</script>

<style lang="scss">
.label {
  line-height: 0.8rem;
  color: #646566;
  font-size: 14px;
  padding: 0 0.3rem;
  .require {
    color: #f00;
    margin-right: 0.12rem;
  }
}
.upload-box {
   6.86rem;
  height: 0.9rem;
  border: 1px dashed #f0443c;
  margin-left: 0.3rem;
  border-radius: 0.1rem;
  margin-bottom: 0.3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  .icon-upload {
    display: inline-block;
     0.26rem;
    height: 0.26rem;
    background: url(../assets/img/icon-upload.png) no-repeat left top;
    background-size: 100% 100%;
    margin-right: 0.16rem;
  }
}
.red {
  color: #da2a2a;
}
</style>

参照：

https://blog.csdn.net/weixin_44980732/article/details/106326200（vue输入框使用模糊搜索）

https://blog.csdn.net/like_js/article/details/112535364（vue 搜索框模糊查询 + 优化(节流) + 关键字高亮）