CSS Property: justify-self: stretch

The default value that allows the element to stretch across the entire width of the cell unless a width is explicitly defined for it.

EXAMPLE

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>justify-self: stretch</title>
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">

    <style>
        * {
            box-sizing: border-box;
        }

        /* grid container layout */
        .grid-container {
            display: grid;
            grid-template-columns: repeat(4, 1fr); /* 4 equally wide columns */
            gap: 10px; /* spacing between grid cells */
            width: 100%; /* grid container width */
            margin: 20px auto; /* center the grid in the window */
            border: 2px solid gray; /* border around the container for visualization */
            color: #333333; /* text color */
        }

        /* child elements in the grid */
        .grid-item {
            justify-self: stretch; /* stretch the element across the entire width of the grid cell */
            aspect-ratio: 3/2; /* width : height ratio */
            height: 10vw; /* fixed height based on viewport width */
            border: 1px solid black; /* border around elements for visualization */
            text-align: center; /* center the content (text) */
            line-height: 10vw; /* vertically center the text */
        }

        /* background colors for visual distinction */
        .a {
            background: greenyellow;
        }
        .b {
            background: orange;
        }
        .c {
            background: pink;
        }
        .d {
            background: lightblue;
        }
    </style>
</head>
<body>
    <!-- grid container -->
    <div class="grid-container">
        <div class="grid-item a">green yellow</div>
        <div class="grid-item b">orange</div>
        <div class="grid-item c">pink</div>
        <div class="grid-item d">light blue</div>
    </div>
</body>
</html>

RESULT