HTML-仅在第二次单击后按钮才会取消

Question

I have a very simple code: I want to cancel a button after it's clicked to display something else. I tried this way

HTML:

<div id="container">
    <input type="button" value="New game" onclick="newGame()" />
</div>

js:

function newGame() {
    var container = document.getElementById("container");
    container.removeChild(container.childNodes[0]);
}

What happens is the button gets cancelled only if I click it two times. Where did I get wrong? I'm sorry if this is a repost, I tried to check but didn't find a quetion identical to mine

Answer 1

It appears as if your code is going to remove the button once you click on it. Is this correct, or are we not looking at the full markup?

Answer 2

try this:

function newGame() {
    var container = document.getElementById("container");
    // change 0 to 1
    container.removeChild(container.childNodes[1]);
} 

container.childNodes[0] is a text Node, in which the text is Newline

Answer 3

I gave id to the button and removed it using id. In your case it is not removing in first time because container.childNodes[0] in first time is not a button. Try your self using console.log in your function.

 function newGame() { var container = document.getElementById("container"); var d_nested = document.getElementById("button_1"); var throwawayNode = container.removeChild(d_nested); //container.innerHTML=''; } 

 <div id="container"> <input id="button_1" type="button" value="New game" onclick="newGame()" /> </div> 

Answer 4

Alternatively, you could do this:

<div id="container">
<input type="button" value="New game" onclick="document.getElementById('container').removeChild(this);" />

No separate JS file needed.

Answer 5

If you remove \\n (ie new line ) your code will work

try like this

 function newGame() { var container = document.getElementById("container"); debugger; container.removeChild(container.childNodes[0]); } 

 <div id="container"><input type="button" value="New game" onclick="newGame()" /></div> 

The reason why your code is not working is, when you hit enter after div , HTML DOM will automatically creates one dummy text node as it's child. hence your input node became the second child for your container .

Working fiddle

Hope it helps :)