need help CSS centering with absolute positioning

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庸人自扰

I\'ve never been totally satisfied with my various solutions to centering content in a web page. the

tag has been deprecated back in the middle of th

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春和景丽

2021-02-14 08:14

Is this what you are looking for ?

<div style=" position: absolute;
             display: inline-block;
             top: 20%;
             bottom: 20%;
             right: 20%;
             left: 20%;
             background-color: #434154;
             text-align: center;">
    <div style="display: inline-block;
                height: 100%;
                vertical-align: middle;"></div>
    <div style="position: relative;
                color: #FFFFFF;
                background-color: #546354;
                display: inline-block;
                vertical-align: middle;">
               THIS IS CENTERED WITHOUT SCRIPTING :D
    </div>
</div>

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北恋

2021-02-14 08:16
If you're sticking with position: absolute; then set the div that you want things positioned against to have position: relative; to make it into the positioning context for any child elements.

To center an absolutely positioned div you need to know it's width, then use the following CSS:
```
#wrapper {
    width: 800px;
    margin: 0 auto;
    position: relative; /* creates a positioning context for child elements */
}

#child {
    position: absolute;
    width: 400px;
    left: 50%;
    margin-left: -200px;
}
```
And the HTML:
```
<div id="wrapper">
    <div id="child">
        ....
    </div>
</div>
```
You can tweak the width and left margin as you need it (the negative left margin should be half of the width of the div you are centering eg. #child.

As other people have mentioned using margin: 0 auto; on an element with a width set on it will center it.
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后悔当初

2021-02-14 08:17

body { text-align: center; }
#wrapper { width: 960px; margin: 0 auto; text-align: left; position: relative; }
#wrapper .child { position: absolute; left: 0; top: 0; }

Just example code, but any .child element would be at 0,0 of the wrapper

Any absolutely positioned element will absolutely position to it's nearest position-relative parent. If an element doesn't have a parent with position relative, it just uses the document. Below is an example without classes (some color and width styles added for clarity).

<html>
    <body style="text-align: center;">
        <div style="position: relative; width: 100px; height: 100px; margin: 0 auto; background: red;">
            <div style="position: absolute; left: 0; top: 0;">
                This will absolutely position relative to the container div.
            </div>
        </div>
        <div style="position: absolute; left: 0; top: 0; width: 100px; height: 100px; background: blue;">
            This will absolutely position relative to the document
        </div>
    </body>
</html>

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