Vue

join()

join()

join() 方法以字串形式傳回數組。
join() 方法不會更改原始陣列。
可以指定任何分隔符號。 預設為逗號 (,)。

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const fruits = ["Banana", "Orange", "Apple", "Mango"];
let text = fruits.join();
console.log(text);
//Banana,Orange,Apple,Mango
let result = Array.isArray(fruits);
console.log(result);
console.log(Array.isArray(text));
//false

參考資料
join() 

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const fruits = ["Banana", "Orange", "Apple", "Mango"];
let text = fruits.join(" and ");
console.log(text);
//Banana and Orange and Apple and Mango

join()