Array.from() return 新陣列
Array.from()方法會從類陣列(array-like) 或 可迭代(iterable)物件 建立一個新的 Array 實體。
console.log(Array.from('foo'));
// Expected output: Array ["f", "o", "o"]
console.log(Array.from([1, 2, 3], x => x + x));
// Expected output: Array [2, 4, 6]
const tiles = Array.from(document.querySelectorAll('.tile'))
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