So I have a body here:

所以我有一个身体

 <body>
 <div id=”first”>
    <span class=”red”>This is a DIV Container</span>

    Or
    <br>
    This
</div>

And I have a style sheet with this

我有一个样式表

#first{
    background-color:red;
}

But the background color doesn't change. I have no idea what I'm doing wrong...

但是背景颜色不会改变。我不知道我做错了什么……

Here's a jsfiddle with the code

这是一个带有代码的jsfiddle。

https://jsfiddle.net/fuz5uqfb/

Doesn't worth there either.

不值得。

1 个解决方案

You're using the wrong kind of quotation marks for your div id and span class. It should be this:

您正在使用错误的类型的引号为您的div id和span类。它应该是这样的:

<body>
    <div id="first">
        <span class="red">This is a DIV Container</span>

        Or
        <br>
        This
    </div>
</body>

Updated Fiddle