Cannot read properties of undefined (reading 'tradeStatus')
时间: 2023-10-18 18:25:54 浏览: 43
当你遇到"Cannot read properties of undefined (reading 'tradeStatus')"的错误时,这意味着你正在尝试读取一个未定义的值的属性。最常见的情况是,你可能未初始化或给该属性赋了undefined的值。为了解决这个错误,你应该在尝试使用之前检查你要访问的对象是否存在。你可以使用typeof运算符来确定变量是否为undefined,在使用之前进行检查。例如:
```javascript
let myObject;
if (typeof myObject !== 'undefined' && myObject.tradeStatus) {
// 使用myObject的tradeStatus属性进行操作
} else {
// 处理myObject未定义或tradeStatus不存在的情况
}
```
在这个例子中,我们先检查myObject是否存在并且具有定义的值,然后再尝试使用tradeStatus属性。如果myObject未定义或tradeStatus不存在,我们可以在else块中处理相应的情况。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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