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並前往https://books.google.com.tw/books?id=1HeLQ7ew7mcC&pg=PA75&lpg=PA75&dq=classlist+undefined&source=bl&ots=C54jfAeK0U&sig=ACfU3U0gDmHzYHOcw3s7TrpqEG6pKNx3kg&hl=zh-TW&sa=X&ved=2ahUKEwjA1oDDp_DzAhW3yYsBHZPWB60Q6AF6BQixAhAD

Interactive Data Visualization for the Web - 第 75 頁 - Google 圖書結果

... hl__proto__: Array[Dl length: 1 h__proto__: ArrayID] 6 undefined ) Figure 5-8. ... r children: HTMLCollection[Dl h classList: DDHTokenList Figure 5-9.

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