keep padding from making the element bigger?

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I have an element with a 70% width, and it is floating beside an element with 30% width, but when I add 25px of padding it expands the element and breaks the fo

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执念已碎

2020-12-05 18:42

When you use the border-box model, the padding is included in the box size. See here for details.

<!DOCTYPE html>
<html>
    <head>
        <title>padding example</title>
        <style type="text/css">
        .seventy {
            display: block;
            float: left;
            width: 70%;
            background-color: red;
        }
        .thirty {
            display: block;
            float: left;
            width: 30%;
            padding: 25px;
            box-sizing: border-box;
            -webkit-box-sizing: border-box;
            -moz-box-sizing: border-box;
            background-color: green;
        }
        </style>
    </head>
    <body>
        <div class="seventy">Stuff</div>
        <div class="thirty">More Stuff</div>
    </body>
</html>

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爱一瞬间的悲伤

2020-12-05 19:05
I would create another element of the same type (may I guess it's a div?) inside the element and set that one to have a padding/margin of 25px.

For example:
```
<div id="wrapper">
 <div id="width30">
 </div>
 <div id="width70">
  <div id="padding25">
   Acctual content here.
  </div>
  </div>
 </div>
</div>
```
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