报错 Details.vue:188 Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'then')

这个错误是由于在调用`.then()`之前未正确使用Promise对象造成的。根据引用和引用的内容，我们可以发现解决这个问题的关键是确保在调用`.then()`之前正确使用`resolve()`和`reject()`。具体来说，你需要将`resolve(data<span class="em">1</span><span class="em">2</span><span class="em">3</span> #### 引用[.reference_title] - *1* [vue Uncaught (in promise) TypeError: Cannot read properties of undefined (reading ‘comcode‘)](https://blog.csdn.net/jungeCSND/article/details/130059965)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT0_1"}}] [.reference_item style="max-width: 50%"] - *2* *3* [Uncaught (in promise)和Uncaught (in promise) TypeError: Cannot read properties of undefined (readin](https://blog.csdn.net/weixin_40476233/article/details/126107676)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT0_1"}}] [.reference_item style="max-width: 50%"] [ .reference_list ]

这个错误是因为在showMessage函数中的调用中，没有正确引用$notify方法。可能是因为在调用前没有正确引入element-ui的$notify方法。你可以尝试在代码中添加以下引入语句: import { $notify } from 'element-ui' 然后在调用$notify方法时使用如下语法: $notify({ title: 'title', message: 'res.msg', type: 'success' }) 此外，还有一个可能的原因是在getList函数中的getUserList调用返回的是一个没有定义then方法的对象。这可能是因为getUserList函数返回的是一个同步对象，而不是一个Promise对象。你可以检查getUserList函数的实现，并确保它返回一个Promise对象，以便在调用时可以使用then方法。 此外，还有一个可能的原因是在methods中的login函数中，可能没有正确引用$confirm和$message方法。你可以尝试在代码中添加以下引入语句: import { $confirm, $message } from 'element-ui' 然后在调用$confirm和$message方法时使用如下语法: $confirm("用户名不存在！是否注册？",{ confirmButtonText:'注册', confirmButtonText:'再试试登录', type:'warning' }) $message({ message:'请重新登录！' }) 你可以根据以上建议进行修改，看看是否能解决你遇到的问题。<span class="em">1</span><span class="em">2</span><span class="em">3</span> #### 引用[.reference_title] - *1* [ElementuUI this.$notify 封装以后报错 properties of undefined (reading ‘$notify‘)，以及封装请求后...](https://blog.csdn.net/m0_49194578/article/details/124924882)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT3_1"}}] [.reference_item style="max-width: 33.333333333333336%"] - *2* [来获取是undefined Uncaught (in promise) TypeError: Cannot read properties of undefined](https://blog.csdn.net/yu_0119/article/details/127068965)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT3_1"}}] [.reference_item style="max-width: 33.333333333333336%"] - *3* [Uncaught (in promise) TypeError: Cannot read property ‘$confirm‘ of undefined at eval (Login.vue](https://blog.csdn.net/tutou_girl/article/details/115679524)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT3_1"}}] [.reference_item style="max-width: 33.333333333333336%"] [ .reference_list ]