我如何摆脱这个数组中的逗号？

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>

If I split the comma , then the code results in the full words I've written in the str variable , and not only 2.
How do I get rid of the comma that appears?

Answer 1

If you join it back with res.join(" ");you will convert it from an array to a string with no comma:

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

Answer 2

You can use join(' ') to join the array.

 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>

Which produces

HOW WAS