CSS mystery characters devoid of significance

As someone new to web development, I've been exploring how to align elements to the vertical center. I came across a solution that didn't work for me initially. Surprisingly, by adding some random characters in the CSS code like full stops and commas, it started working perfectly fine. I tested this on both Safari and Chrome with consistent results. Are these characters somehow affecting the alignment?

Here is the original solution provided:

<head>
    <style>
        #parent {
            position: relative;}
        #child {
            position: absolute;
            top: 50%;
            height: 30%;
            width: 50%;

        }
    </style>
</head>

<body>
    <div id="parent">
        <div id="child">Content here</div>
    </div>
</body>

And here is the modified solution with the added meaningless character:

<head>
    <style>
        #parent {
            ,
            position: relative;}
        #child {
            position: absolute;
            top: 50%;
            height: 30%;
            width: 50%;

        }
    </style>
</head>

Answer №1

The issue arises due to certain characters disrupting the CSS within the "parent" element, making it seem as if it is not functioning correctly. Refer to the example below:

    #child {
            position: absolute;
            top: 50%;
            height: 30%;
            width: 50%;

        }
<head>
</head>

<body>
    <div id="parent">
        <div id="child">Content here</div>
    </div>
</body>

Answer №2

The comma in the CSS style #parent is causing invalidation due to improper syntax. This will be overlooked by the CSS parser in browsers. It's similar to excluding it altogether:

<head>
    <style>
        #child {
            position: absolute;
            top: 50%;
            height: 30%;
            width: 50%;

        }
    </style>
</head>

<body>
    <div id="parent">
        <div id="child">Content here</div>
    </div>
</body>

Removing the #parent style makes the code work, but the explanation for this behavior can be found here

Answer №3

It's better to relocate the #parent rather than the #child

  1. Ensure that you move the parent container, not the child.

  2. #parent{ position: absolute;} is deriving its properties from <body>

  3. #child {position: relative;} is inheriting properties from #parent

  4. HAPPY CODING! KEEP IT UP! :)

https://i.sstatic.net/vekTd.png

#parent {
    border: 10px solid green;
    position: absolute;
    width: 50%;
    top: 50%;

}

#child {
    border: 5px solid red;
    position: relative;
}
<div id="parent">
  <div id="child">Content here</div>
</div>

Answer №4

View Screenshot

In the screenshot I provided, you can clearly see that there is an issue with the character's position: relative property being set to an invalid value. I highly recommend utilizing Developer Tools (learn more here) to inspect and debug CSS properties of specific elements on your webpage by clicking on them.

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