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javascript記入中に検証ツールでエラーが出た時の原因

Posted at

スクリーンショット 2021-11-28 15.11.26.png

この The value "" for key "width" is invalid, and has been ignored. の原因について。
スクリーンショット 2021-11-28 15.11.45.png
問題のHTMLファイルはこれ。。。

shift+1でもう一度HTML雛形を確認してみると

スクリーンショット 2021-11-28 15.12.06.png

widthの後の device-width が抜けている!!
いつ抜けたのかはわからない笑

抜けた場所にdevice-width,(カンマを忘れずに)を入れると

スクリーンショット 2021-11-28 15.13.18.png

エラーがなくなった。

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