Cannot read properties of undefined (reading 'dormNum')
时间: 2023-09-27 09:08:08 浏览: 112
问题的报错信息"Cannot read properties of undefined (reading 'dormNum')"通常出现在尝试访问未定义值的属性时。这可能是因为您正在尝试访问一个未初始化的对象、字符串或数组的属性,或者该属性的值为undefined。为了解决这个问题,您需要在尝试使用之前检查您要访问的对象是否存在。您可以使用typeof运算符来确定变量是否为undefined。例如:
```javascript
let myObject;
if (typeof myObject !== 'undefined' && myObject.dormNum !== undefined) {
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