npm install axios

/*main.js*/
import axios from 'axios'
Vue.prototype.$ajax = axios

/*components*/
import axios from 'axios'

export default {
  created () {
    axios.get('./static/data.json').then(res => {
    })
  }
}

<div class="tab" ref="domList">
</div>
<script>
created () {
    this.$nextTick(() => {
      console.log(this.$refs.domList)
    })
}
</script>