简单重置

直接对data中的所有数据一个个进行赋值，新手往往都会这么做，字段少时还好，但是一旦字段过多就会导致大量代码冗余，一不小心还容易输错。

<script>
  export default{
    data() {
    return {
      robotName: "gpt机器人",
      chatList: [], 
      inputMsg: "",
      eventSource: null,
      userId: ""
    };
  },
methods: {
    reset() {
      this.robotName="gpt机器人";
      this.chatList = [];
      this.inputMsg = "";
      this.eventSource = null;
      this.userId = "";
    },
  },
  };
</script>

Vue2数据重置

<script>
import { reactive, toRefs } from 'vue';
  export default{
    data() {
    return {
      robotName: "gpt机器人",
      chatList: [], 
      inputMsg: "",
      eventSource: null,
      userId: ""
    };
  },
methods: {
    reset() {
     Object.assign(this.$data, this.$options.data.call(this))
    },
  },
  };
</script>

可以发现我们用Object.assign(this.$data, this.$options.data.call(this))一行代码替代了复杂的赋值操作，这句话实际就是调用了data这个函数，并把this作为参数传人，将 data 函数中定义的初始数据合并到实例的数据中，以确保实例成功重置。

Vue3数据重置

<script>
export default {
  setup() {
    const data = reactive({
      robotName: "gpt机器人",
      chatList: [], 
      inputMsg: "",
      eventSource: null,
      userId: ""
    });
​
    const originalData = reactive({
      robotName: "gpt机器人",
      chatList: [], 
      inputMsg: "",
      eventSource: null,
      userId: ""
    });
​
    const reset = () => {
      Object.assign(data, originalData);
    };
​
    return {
      ...toRefs(data),
      reset
    };
  }
};
</script>

Vue3数据重置(setup语法糖)

<script setup>
import { reactive } from "vue";
  const originData = reactive({ 
    robotName: "gpt机器人",
    chatList: [], 
    inputMsg: "",
    eventSource: null,
    userId: ""
  });
  const data = reactive({
    robotName: "gpt机器人",
    chatList: [], 
    inputMsg: "",
    eventSource: null,
    userId: ""
  });
const reset = () => {
  Object.assign(data, originData);
};
</script>