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

引用和中提到的错误信息"Error in v-on handler: TypeError: Cannot read properties of undefined (reading '0')"和"Error in v-on handler: TypeError: Cannot read properties of undefined (reading 'concat')"通常是由于对象为空(undefined)或者尝试获取不正确的属性值引起的。

对于你提到的错误"Error in v-on handler: TypeError: Cannot read properties of undefined (reading 'setCheckedNodes')"，同样也是因为尝试访问了一个未定义的属性('setCheckedNodes')。

所以，根据引用的分析，这个错误很可能是因为对象本身为空或者尝试访问了不正确的属性值。你可以检查一下代码中是否正确地初始化了相关对象，并且确认是否在正确的位置上访问了相关属性。<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_2"}}] [.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_2"}}] [.reference_item style="max-width: 50%"]
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