在created中创建dom操作的方法是什么？

<template>
  <div class="hello">
    <h1 id="nextTick" ref="hello">hello boy!</h1>
  </div>
</template>
 
<script>
export default {
  name: 'HelloWorld',
  data () {
    return {
      msg: 'HelloWorld'
    }
  },
    created(){
        let that=this;
          that.$nextTick(function(){  //不使用this.$nextTick()方法会报错
          that.$refs.hello.innerHTML="hello girl!";  //写入到DOM元素
      });
 
  },
}
</script>
 
<style scoped>
h1 {
  font-weight: normal;
}
</style>