Javascript - 修改HTML标签上的CSS？

问题描述：

我正在处理的这个页面上的HTML标签是一个给它顶部填充的 28px 。单击按钮时我需要暂时离开，但似乎我无法更改HTML标签本身的样式。

The HTML tag on this page I'm working on is in a class that is giving it a top padding of 28px. I need this to go away temporarily when a button is clicked, but it doesn't appear that I can change the styling of the HTML tag itself.

我是否需要在body标签上使用 position：relative; 或类似的东西？有没有办法将CSS分配给我不知道的HTML标签？

Will I need to use position: relative; on the body tag or something similar? Is there really a way to assign CSS to the HTML tag that I don't know about?

@ Comments：

@ Comments:

对不起，我在这里有点匆忙。这是有效的：

Sorry, I'm in a bit of a rush here. It's something to the effect of this:

<html class='pad_my_top'>
<head>

<style type='text/css'>
    .pad_my_top{
        padding-top: 28px;
    }

    body{
        background: #000000;
    }
</style>

<script type='text/javascript'>
    function its_gone(){
        // Something here to remove padding.
        alert("It's gone. Hurray!");
        // Something to put it back.
    }
</script>

</html>
<body>

<button onClick='its_gone()'>Click me to get rid of the top padding</button>

</body>
</html>

我真的希望它消失，所以我可以用Javascript打印页面，但我宁愿不使用任何第三方代码，因为这是一个WordPress的插件，我不想要十亿依赖。我只需要隐藏/重新显示3个div并（重新）更改2个样式。

I really want it gone so I can print the page with Javascript, but I'd rather not use any 3rd party code because this is for a plugin for Wordpress and I don't want a billion dependencies. I only need to hide/re-display 3 divs and (re)change 2 styles.

答

使用此删除顶部填充：

document.documentElement.style.paddingTop = "0";

并将其设置回来：

document.documentElement.style.paddingTop = "28px";

Javascript - 修改HTML标签上的CSS？

相关推荐