重置vue组件的data数据 this.$options.data() 重置

 <template>
    <el-button @click="resetForm('ruleForm')">重置</el-button>
</template>
 
 <script>
 methods: {
      resetForm(formName) {
        this.$refs[formName].resetFields();
      }
    }
</script>

<script>
    export default {
        data() {
            return {
                // data表单对象
                form: {
                    input: ''
                }
            }
        },
        methods: {
            // 重置表单方法
            retset() {
                this.form = this.$options.data().form;
            }
        },
    }
</script>

Object.assign(this.$data.formData, this.$options.data().formData) // 重置至初始化值

for( let key in obj){
    delete obj[key]
}