box-decoration-break is a CSS attribute that controls how elements are displayed when they are line-breaked, paging or cropped. Its default value is slice (disconnected display). When using clone value, each segment of the line-breaked inline element can independently render the background, border, rounded corners and other styles. 1. When an inline element such as span is broken by text wrapping, the background and rounded corners will be cut at the breakpoint by default; 2. After setting box-decoration-break: clone, each line of clip will fully display the background color, rounded corners and margins, which is more visually like multiple independent highlighted tags; 3. This attribute is particularly effective for inline elements and is often used to highlight long text, print pages, and custom inline tags; 4. Note that this attribute does not affect the layout, and is not supported in old browsers such as IE, but modern browsers have good compatibility. Therefore, if you want each segment of the highlighted text to remain in full style across lines, you should use box-decoration-break: clone.
box-decoration-break is a less commonly used but very practical CSS attribute, mainly used to control how an element is displayed when it is paging, line-breaking, or cropped . It is especially useful when dealing with cross-line inline elements (such as <span></span> that are broken) or paging printing.
What is box-decoration-break ?
When you have an inline element (such as <span></span> ) broken into two lines by text wrapping, its background color is "disconnected" by default - that is, each line renders the background separately, with no connection in the middle. box-decoration-break can change this behavior.
It has two main values:
-
slice(default): The element is "cut" and the decoration is cut at the breakpoint. -
clone: Each part is rendered like a separate box, and the decoration (such as backgrounds, borders) is completely copied to each part.
Practical example: Use box-decoration-break: clone
Suppose we have a highlighted paragraph in a long text:
<p> This is a very long paragraph, and we want the highlighted text in it to maintain the complete background and rounded corners when the line breaks</span>. Keep writing some content to test the line break effect. </p>
Default CSS ( box-decoration-break: slice ):
.highlight {
background: yellow;
border-radius: 4px;
padding: 2px 4px;
} Effective problems :
When this text breaks, the background and rounded corners are "cut off" at the end of the line and the next line, which is visually incoherent, and rounded corners only appear at the beginning and end parts.
Use box-decoration-break: clone to fix:
.highlight {
background: yellow;
border-radius: 4px;
padding: 2px 4px;
box-decoration-break: clone;
}Effect changes :
- Each line of fragments has a complete background, rounded corners and inner margins independently .
- Visually more like "multiple independent highlighting tags" than a cut-off tag.
- The background color is displayed in full on each line segment, with rounded corners appearing at the beginning and end of each line.
More complete sample code
<!DOCTYPE html>
<html lang="zh">
<head>
<style>
p {
width: 300px;
font-size: 18px;
line-height: 1.6;
}
.highlight {
background: #ffeb3b;
color: #000;
padding: 2px 6px;
border-radius: 6px;
box-decoration-break: clone;
}
</style>
</head>
<body>
<p>
This is a test paragraph to show how <span class="highlight">box-decoration-break: clone can keep each line of highlighted text with a complete background and rounded corner effect, making it look more beautiful.
Continue to enter some text to make sure the line break occurs.
</p>
</body>
</html>Scenario recommendations
- ? Highlight long text clips (such as search keyword highlighting)
- ?Disposable page breaks in print style
- ?Custom inline tags, tag components
- ? Not suitable for ordinary layout of block-level elements
Things to note
-
box-decoration-breakhas the most obvious effect on inline elements . - It is not supported well in some older browsers (such as IE does not support it, but it is basically supported by modern browsers).
- It is worth noting that
box-decoration-breakwill also affect the line breaking performance of decorative attributes such asbox-shadow,margin, andborder.
Basically that's it.
Simply put:
Want to make each paragraph of the highlighted text in the line break look as good as an independent label ? Just use box-decoration-break: clone .
The above is the detailed content of css box-decoration-break example. For more information, please follow other related articles on the PHP Chinese website!
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