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A CSS margin-trim example

The CSS margin-trim property was recently added and it manages the trimming of the margins when a child meets the container's edges.

Let's take the below example:

<head>
    <style>
        .container {
            margin: 1rem;
            border: 1px solid;
            margin-trim: block;
        }
    </style>
</head>
<body>
    <div class="container">
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    </div>
</body>

The CSS margin-trim will cut the first and last margin allowing us a perfect alignment with the container's edges.
A CSS margin-trim example

Before this was possible by using a mix of :last-child/:first-child pseudo classes or using the gap property.

For the moment margin-trim does not have a great browser support, and it is only supported in Safari 16.4 and above.

As usual, the full code of the example is here and you can see it live on GitHub Pages.

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