Button inside Div isn't showing with the div

Question

I have a button inside a. The div has an id = "winningMsg". Button has no id.

But only the div text is showing and the button remains hidden.

What am I doing wrong?

 document.getElementById("winningMsg").style.display = "block";

 <div id="winningMsg"> <button type="button" onclick="restart()">Restart</button> </div>

Answer 1

You have to put double quotes to id tag:

<div id="winningMsg">
     <button type = "button" onclick="restart()">Restart</button>
</div>