Cannot read properties of undefined (reading 'get') at eval

这是一个代码问题，报错信息显示无法读取未定义的属性'get'。根据引用，已经知道这是一个报错信息。根据引用，这是一个关于使用折线图和更新数据的需求。根据引用，已经有了解决方法，即重新编写模块的导出方式。需要注意的是，在代码中的判断语句`if (rateChart != null && rateChart != "" && rateChart != undefined)`可能存在问题，可以考虑改为`if (rateChart)`来判断实例是否存在。另外，可能需要检查代码中是否有其他地方出现了类似的报错或问题。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* *3* [Cannot read properties of undefined (reading ‘getters‘)](https://blog.csdn.net/qq_43382759/article/details/123686586)[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* [使用echarts报错 Cannot read properties of undefined (reading ‘getInstanceByDom‘) at eval](https://blog.csdn.net/weixin_39891473/article/details/126262999)[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%"]
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