不能将边距和填充设置为 0

Question

我正在构建一个井字游戏，我用 css 绘制的棋盘一直在我插入的 'X' 上移动，就好像 'X' 有边距属性。我已将所有边距和填充设置为 0 或 none，每次插入时它都会移动我的板。

html代码：

<!DOCTYPE html>
<html>

<head>
    <link rel="stylesheet" type="text/css" href="styles.css">
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>

    <script>
    $(document).ready(function(){
    $(".sq").click(function(){
        $(this).html("<em class='x'>X</em>");
    });
});
    </script>

</head>
<body>
<center>
    <div id="gameboard">
            <div class="sq" id="top-left"></div>
            <div class="sq" id="top-mid"></div>
            <div class="sq" id="top-right"></div>
            <div class="sq" id="mid-left"></div>
            <div class="sq" id="mid-mid"></div>
            <div class="sq" id="mid-right"></div>
            <div class="sq" id="bot-left"></div>
            <div class="sq" id="bot-mid"></div>
            <div class="sq" id="bot-right"></div>
    </div>
</center>

</body>
</html>

这是 css 文件：

div {
    position: static;
}

#gameboard {
    width: 900px;
}

#top-left {
    border-bottom: 1px solid black;
    border-right: 1px solid black;
}

#top-mid {

    border-bottom: 1px solid black;
    border-right: 1px solid black;
}

#top-right {

    border-bottom: 1px solid black;
}

#mid-left {

    border-bottom: 1px solid black;
    border-right: 1px solid black;
}

#mid-mid {

    border-bottom: 1px solid black;
    border-right: 1px solid black;
}

#mid-right {

    border-bottom: 1px solid black;
}

#bot-left {

    border-right: 1px solid black;
}

#bot-mid {

    border-right: 1px solid black;
}

#bot-right {

}

.sq {
    padding: none;
    margin: -5px;
    display: inline-block;
    width: 300px;
    height: 250px;
}

.x {
    padding: 0;
    margin: none;
    font-size: 150px;
}

.o {
    padding: 0;
    margin: 0;
    font-size: 200px;
}

Answer 1

您只需将 position:absolute 添加到 <em> 元素（在本例中为 x）；

div {
    position: static;
}

#gameboard {
    width: 900px;
}

#top-left {
    border-bottom: 1px solid black;
    border-right: 1px solid black;
}

#top-mid {

    border-bottom: 1px solid black;
    border-right: 1px solid black;
}

#top-right {

    border-bottom: 1px solid black;
}

#mid-left {

    border-bottom: 1px solid black;
    border-right: 1px solid black;
}

#mid-mid {

    border-bottom: 1px solid black;
    border-right: 1px solid black;
}

#mid-right {

    border-bottom: 1px solid black;
}

#bot-left {

    border-right: 1px solid black;
}

#bot-mid {

    border-right: 1px solid black;
}

#bot-right {

}

.sq {
    padding: none;
    margin: -5px;
    display: inline-block;
    width: 300px;
    height: 250px;
}

.x {
    padding: 0;
    margin: none;
    font-size: 150px;
    position: absolute;
}

.o {
    padding: 0;
    margin: 0;
    font-size: 200px;
}

<!DOCTYPE html>
<html>

<head>
    <link rel="stylesheet" type="text/css" href="styles.css">
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>

    <script>
    $(document).ready(function(){
    $(".sq").click(function(){
        $(this).html("<em class='x'>X</em>");
    });
});
    </script>

</head>
<body>
<center>
    <div id="gameboard">
            <div class="sq" id="top-left"></div>
            <div class="sq" id="top-mid"></div>
            <div class="sq" id="top-right"></div>
            <div class="sq" id="mid-left"></div>
            <div class="sq" id="mid-mid"></div>
            <div class="sq" id="mid-right"></div>
            <div class="sq" id="bot-left"></div>
            <div class="sq" id="bot-mid"></div>
            <div class="sq" id="bot-right"></div>
    </div>
</center>

</body>
</html>

不能将边距和填充设置为 0

cant set margin and padding to 0

css

margin

padding