报错:cannot read properties of undefined(reading ‘forEach‘)

简介: 报错:cannot read properties of undefined(reading ‘forEach‘)

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报错

在这里插入图片描述

cannot read properties of undefined(reading 'forEach')

分析原因

因为要遍历对象,而对象恰好又是undefined的,所以就会报这么一个错误,没有属性。

解决方案

在遍历对象之前先进行判断,判断对象是否为空,然后再去遍历该对象,就会成功避免这个问题。

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