const isInvalidDate = (date: Date) => Number.isNaN(date.getTime());

*javascript

yamadar のブックマーク 2023/04/24 11:27

<blockquote class="hatena-bookmark-comment"><a class="comment-info" href="https://b.hatena.ne.jp/entry/4735540438004308421/comment/yamadar" data-user-id="yamadar" data-entry-url="https://b.hatena.ne.jp/entry/s/saunabouya.com/2022/10/04/javascript-invalid-date-judge/" data-original-href="https://saunabouya.com/2022/10/04/javascript-invalid-date-judge/" data-entry-favicon="https://cdn-ak2.favicon.st-hatena.com/64?url=https%3A%2F%2Fsaunabouya.com%2F2022%2F10%2F04%2Fjavascript-invalid-date-judge%2F" data-user-icon="/users/yamadar/profile.png">JavaScriptでInvalid Dateを判定する - さうな坊や.com</a><ul class="comment-tag" style="list-style: none; margin: 0px;"><li style="float: left">[<a href="https://b.hatena.ne.jp/q/%2Ajavascript">*javascript</a>]</li></ul><br><p style="clear: left">const isInvalidDate = (date: Date) =&gt; Number.isNaN(date.getTime());</p><a class="datetime" href="https://b.hatena.ne.jp/yamadar/20230424#bookmark-4735540438004308421"><span class="datetime-body">2023/04/24 11:27</span></a></blockquote><script src="https://b.st-hatena.com/js/comment-widget.js" charset="utf-8" async></script>

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