html:

 <van-field
          v-model="meetingname"
          left-icon="search"
          style="border-radius:25px;height: 35px;line-height: 15px;"
          placeholder="会议搜索"
        />

data:
meetingname: “”

watch: {
    meetingname(val) {
      this.loaddata();
    }
  },

js:

 loaddata: async function() {
      let _self = this;
      try {
        let { data } = await _self.$http.get(
          `/screenmeetingapply?skip=0&take=&startTime=&endTime=&purpose=${this.meetingname}&unitid=${this.unitid}`
        );
        if (data.result == "success") {
          _self.mydepartdata = data.data;
        }
      } catch (error) {
        console.log(error);
      }
    },