sessionStorage.setItem undefind

根据引用，sessionStorage是一个用于操作sessionStorage的JavaScript对象，它提供了增加、修改、删除和查询方法，方便我们对sessionStorage进行操作。具体来说，sessionStorage.setItem方法被用于设置sessionStorage中指定键名的值。但是根据你提供的问题，sessionStorage.setItem的返回值是undefined，并不会返回具体的值。因此，你在代码中使用sessionStorage.setItem时，不需要关注返回值，而是关注它是否成功地将值存储到sessionStorage中。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* [sessionStorage.js](https://download.csdn.net/download/qq_27142569/12427911)[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: 33.333333333333336%"]
- *2* [window.sessionStorage.setItem](https://blog.csdn.net/zhou120189162/article/details/78874677)[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: 33.333333333333336%"]
- *3* [sessionStorage.setItem无效](https://blog.csdn.net/Szy1474123362/article/details/129493486)[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: 33.333333333333336%"]
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