CSS Min and Max Size
The min and max size properties set boundaries so an element never shrinks below or grows beyond a chosen limit.
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Fixed widths and heights are rigid, which can break layouts on different screen sizes. The min and max properties let an element flex within a safe range, which is a cornerstone of responsive design.
The four properties
Responsive images
<!DOCTYPE html>
<html>
<head>
<style>
img {
max-width: 100%;
height: auto;
}
</style>
</head>
<body>
<img src="photo.jpg" alt="Mountain view">
</body>
</html>Setting <max-width> to 100% on an image is one of the most common responsive rules. It lets the image shrink to fit narrow screens while never stretching past its natural size, and height: auto keeps its proportions.
Constraining a text column
Readable, flexible container
<!DOCTYPE html>
<html>
<head>
<style>
.article {
width: 100%;
max-width: 720px;
min-width: 320px;
margin: 0 auto;
}
</style>
</head>
<body>
<div class="article">
<p>This column stays readable at any screen width.</p>
</div>
</body>
</html>Note: When both width and max-width are set, max-width always wins if there is a conflict. The same is true for min-width, which takes priority over both.
Exercise: CSS Height / Width
With the default `box-sizing: content-box`, does the `width` property include padding and border?
