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並前往https://books.google.com.tw/books?id=5eZDDwAAQBAJ&pg=PA152&lpg=PA152&dq=React+copy+array&source=bl&ots=XLvQJyjC2l&sig=ACfU3U0SaVqsxC89A9TC65s4yd2qeS0mkw&hl=zh-TW&sa=X&ved=2ahUKEwiIqNW30er_AhX5j4kEHZcoBmUQ6AF6BQiwAhAD

Building Serverless Web Applications - 第 152 頁 - Google 圖書結果

... isSelected state: handleSelect(product) { // create a copy of the products array ... isSelected; // make React aware that the state has changed this.

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