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@yumiya_yumigonin運営者ギルド

[JavaScript]タッチイベントからoffsetXとoffsetXを取得する

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スマホのタッチイベントからoffsetX, offsetYを取得する手法。
忘れがちなのでメモ。

        const rect = event.target.getBoundingClientRect()
        const offsetX = (event.touches[0].clientX - window.pageXOffset - rect.left) 
        const offsetY = (event.touches[0].clientY - window.pageYOffset - rect.top)
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