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TS 这么写报错怎么办？ Object is possibly 'null'

in Technique[技术] by (71.8m points)

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window.document.getElementsByTagName('iframe')[0].contentWindow.location.pathname
应该怎么写


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by (71.8m points)

你要确定一定有个 iframe，不会是空，那就加非空断言。

document.getElementsByTagName('iframe')[0]!.contentWindow!.location.pathname

与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
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