Javascript “无法读取 null 的属性‘xxx’”
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时间:2020-08-23 01:35:10 来源:igfitidea点击:
"Cannot read property 'xxx' of null"
提问by Matrym
I've got a document fragment with children that I want to loop over (when possible). This is causing an error "Cannot read property 'xxx' of null".
我有一个带孩子的文档片段,我想循环播放(如果可能)。这会导致错误“无法读取 null 的属性 'xxx'”。
How do I test if this will be the case?
我如何测试是否会出现这种情况?
采纳答案by Daniel Vassallo
You may want to do the following:
您可能想要执行以下操作:
if ((documentFragment !== null) && documentFragment.hasOwnProperty('xxx')) {
// handle property xxx of documentFragment as required
}

