vuecli3打包项目上线之后报错怎么使用本地的sourcemap文件定位调试？

<template>
  <div class="hello">
    <router-link to="/">去首页页面</router-link>
    <h1>{{ msg }}</h1>
    <button @click="handleClick">点击保存</button>
  </div>
</template>
<script>
export default {
  name: 'HelloWorld',
  props: {
    msg: String
  },
  data() {
    return {
    }
  },
  created() {
  },
  mounted() {
  },
  methods: {
    handleClick() {
      alert(kaimo313);
    }
  }
}
</script>
<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
h3 {
  margin: 40px 0 0;
}
ul {
  list-style-type: none;
  padding: 0;
}
li {
  display: inline-block;
  margin: 0 10px;
}
a {
  color: #42b983;
}
</style>