Cannot read property 'dataset' of null

Cannot read property 'dataset' of null是一个错误消息，意味着在代码中尝试访问一个为null的数据集。这通常发生在调用了一个不存在或未定义的元素的dataset属性时。在给定的引用中，错误发生在页面的message/message onReady函数中。这个错误可能是由于获取元素失败或者对获取的元素进行操作时发生的。要解决这个问题，可以检查代码中是否正确获取了元素，并确保元素存在和已定义。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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