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fix(useDefault): 修改数据绑定的逻辑 #1776

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fix(useDefault): 修改数据绑定的逻辑 #1776

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mikasayw
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🤔 这个 PR 的性质是？

  • 日常 bug 修复
  • 新特性提交
  • 文档改进
  • 演示代码改进
  • 组件样式/交互改进
  • CI/CD 改进
  • 重构
  • 代码风格优化
  • 测试用例
  • 分支合并
  • 其他

🔗 相关 Issue

💡 需求背景和解决方案

  • 问题：双向绑定的初始值是undefined时，再次改变并不会实时更新
  • 影响范围：所有使用useDefault绑定值的组件
  • 原因：useDefault初始化时判断值为 undefined时，不会进行监听
  • 方案：细化监听逻辑同时修改isUsedModelValue和isUsedKey

📝 更新日志

  • fix(组件名称): 处理问题或特性描述 ...

  • 本条 PR 不需要纳入 Changelog

☑️ 请求合并前的自查清单

⚠️ 请自检并全部勾选全部选项。⚠️

  • 文档已补充或无须补充
  • 代码演示已提供或无须提供
  • TypeScript 定义已补充或无须补充
  • Changelog 已提供或无须提供

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完成

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@anlyyao anlyyao Awaiting requested review from anlyyao anlyyao is a code owner

@liweijie0812 liweijie0812 Awaiting requested review from liweijie0812 liweijie0812 is a code owner

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@mikasayw