用vue写一个弹出登录框组件

好的，下面是一个基于Vue的弹出登录框组件的代码示例:

<template>
  <div class="login-modal">
    <div class="modal">
      <div class="modal-header">
        <h4 class="modal-title">{{ title }}</h4>
        <button type="button" class="close" @click="closeModal">×</button>
      </div>
      <div class="modal-body">
        <form @submit.prevent="submitForm">
          <div class="form-group">
            <label for="username">用户名：</label>
            <input type="text" class="form-control" v-model="username" />
          </div>
          <div class="form-group">
            <label for="password">密码：</label>
            <input type="password" class="form-control" v-model="password" />
          </div>
          <button type="submit" class="btn btn-primary">登录</button>
        </form>
      </div>
    </div>
  </div>
</template>

<script>
export default {
  name: "LoginModal",
  props: {
    title: {
      type: String,
      default: "登录",
    },
  },
  data() {
    return {
      username: "",
      password: "",
    };
  },
  methods: {
    closeModal() {
      this.$emit("close");
    },
    submitForm() {
      // 发送登录请求
      // ...
      // 登录成功后关闭弹窗
      this.closeModal();
    },
  },
};
</script>

<style>
.login-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 9999;
  display: flex;
  justify-content: center;
  align-items: center;
}
.modal {
  max-width: 400px;
  background-color: #fff;
  border-radius: 5px;
  padding: 20px;
  box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.5);
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.modal-title {
  margin: 0;
  font-size: 20px;
}
.close {
  border: none;
  background-color: transparent;
  font-size: 24px;
  cursor: pointer;
}
.form-group {
  margin-bottom: 10px;
}
.form-control {
  width: 100%;
  padding: 8px;
  border-radius: 5px;
  border: 1px solid #ccc;
}
.btn-primary {
  background-color: #007bff;
  border: none;
  color: #fff;
  padding: 8px 16px;
  border-radius: 5px;
  cursor: pointer;
}
</style>

这个组件包含一个弹出框和一个表单，用户可以在表单中输入用户名和密码，点击登录按钮后发送登录请求。当登录成功后，弹出框会关闭。这个组件可以作为一个单独的模块来使用，只需要在父组件中调用并监听其`close`事件即可。