在不替换VueJS中模板的情况下处理表单提交

<template>
  <form @submit="handleSubmit">
    <input type="text" v-model="formData.username" placeholder="Username">
    <input type="password" v-model="formData.password" placeholder="Password">
    <button type="submit">Submit</button>
  </form>
</template>

<script>
export default {
  data() {
    return {
      formData: {
        username: '',
        password: ''
      }
    };
  },
  methods: {
    handleSubmit(event) {
      event.preventDefault(); // 阻止表单默认提交行为

      // 表单验证逻辑
      if (this.formData.username === '' || this.formData.password === '') {
        alert('Please fill in all fields');
        return;
      }

      // 发送后端请求
      // 使用axios库发送POST请求示例
      axios.post('/api/login', this.formData)
        .then(response => {
          // 请求成功处理逻辑
          console.log(response.data);
          alert('Login successful');
        })
        .catch(error => {
          // 请求失败处理逻辑
          console.error(error);
          alert('Login failed');
        });
    }
  }
};
</script>