我如何擺脫這個數組中的逗號？

Question

 const el_Demo = document.getElementById("demo") // demo element function myFunction() { const stringSample = "how was your day?"; const arrayObject = stringSample.split(" ", 2); el_Demo.textContent = arrayObject; const textValue = el_Demo.textContent; el_Demo.textContent = textValue.toUpperCase(); }

 <p id="demo"> ... result after click ...</p> <button class="btn" onclick="myFunction()">click</button>

如果我拆分逗號，那么代碼會生成我在 str 變量中寫入的完整單詞，而不僅僅是 2 個。
如何擺脫出現的逗號？

Answer 1

如果你用res.join(" "); join它您會將其從數組轉換為不帶逗號的字符串：

document.getElementById("demo").innerHTML = res.join(" ");

Answer 2

您可以使用join(' ')加入數組。

 function myFunction() { var str = "how was your day?"; var res = str.split(" ", 2); document.getElementById("demo").innerHTML = res.join(' '); var txt = document.getElementById("demo").innerHTML; document.getElementById('demo').innerHTML = txt.toUpperCase(); }

 <div id="demo"></div> <button class="btn" onclick="myFunction()">click</button>

其中產生

HOW WAS