Error in v-on handler: "TypeError: Cannot read properties of undefined (reading 'on')"

根据您提供的引文，"Error in v-on handler: TypeError: Cannot read properties of undefined (reading 'on')" 错误通常有两种可能的情况：

第一种情况是对象本身为空，即为undefined。在这种情况下，无法对空对象进行属性读取操作，因此会引发该错误。

第二种情况是尝试访问对象不存在的属性。例如，对数组进行属性值的访问，或对对象进行length值的访问，都属于不应该取的属性，因此也会引发该错误。

请检查您的代码，确保避免以上两种情况的错误发生，以解决该问题。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* *3* [Error in v-on handler: “TypeError: Cannot read properties of undefined (reading ‘0‘)](https://blog.csdn.net/qingpingguo12/article/details/127858313)[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^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
- *2* [Error in v-on handler: “TypeError: Cannot read properties of undefined (reading ‘concat‘)“报错](https://blog.csdn.net/qq_40086382/article/details/129314009)[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^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
[ .reference_list ]