element ui 搜索框中搜索关键字标红展示

示例如图

el-select上绑定remote-method属性

 <el-select v-model="checkForm.type" filterable remote reserve-keyword :remote-method="remoteMethod" :loading="loading">
   <el-option v-for="item in options" :key="item.value" :value="item.value">
     <span v-html="item.text"></span>
   </el-option>
 </el-select>

定义remoteMethod方法

interface ListItem {
  value: string
  label: string,
  text: string
}
const options = ref<ListItem[]>([])
const list = ref([{
  value:'123',
  label:'123',
  text:''
},{
  value:'125',
  label:'125',
  text:''
}])

const remoteMethod =  (query) => {
  if (query) {
    loading.value = true
    setTimeout(() => {
      loading.value = false
      list.value.forEach(item => {
        if(item.value.indexOf(query)>=0){
          var val = item.value.split(query)
          item.text = val.join('<span style="color:red">' + query + "</span>")
        }
      })
      options.value = list.value
    }, 1000)
  } else {
    options.value = []
  }
}