CSSクリップパスプロパティの導入-CSSチュートリアル-php.cn

CSSクリップパスプロパティの導入

Joseph Gordon-Levitt

リリース： 2025-02-21 08:29:09

オリジナル

463 人が閲覧しました

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>CSS Clip-Path: Shaping Web Elements</title>
    <style>
        body {
            font-family: sans-serif;
        }
        .container {
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
        }
        .intro-image {
            width: 500px;
            height: auto;
        }
        .section-title {
            font-size: 1.5em;
            font-weight: bold;
            margin-bottom: 1em;
        }
        .code-example {
            background-color: #f0f0f0;
            padding: 1em;
            border-radius: 5px;
            margin-bottom: 1em;
            overflow-x: auto; /* Add horizontal scroll if needed */
        }
        .code-example pre {
            margin: 0;
        }
        .image-example {
            display: flex;
            justify-content: center;
            align-items: center;
            margin-bottom: 2em;
        }
        .image-example img {
            max-width: 100%;
            height: auto;
        }
        .key-takeaway {
            margin-bottom: 2em;
        }
        .key-takeaway ul {
            list-style-type: disc;
            padding-left: 20px;
        }
        .faq-section {
            margin-top: 3em;
        }
        .faq-section h2 {
            font-size: 1.8em;
            font-weight: bold;
            margin-bottom: 1em;
        }
        .faq-section .faq-item {
            margin-bottom: 1em;
        }
        .faq-section .faq-item h3 {
            font-weight: bold;
            margin-bottom: 0.5em;
        }
    </style>
</head>
<body>
    <div class="container">
        <img src="/static/imghw/default1.png"  data-src="https://img.php.cn/upload/article/000/000/000/174009775169997.jpg"  class="lazy" alt="Introducing the CSS clip-path Property " />
    </div>

    <p>The web's predominantly rectangular layout contrasts with print media's diverse shapes.  This difference stems partly from a lack of suitable tools. This tutorial introduces <code>clip-path</code>, a CSS property offering the design flexibility of print.</p>

    <div class="key-takeaway">
        <h2>Key Takeaways</h2>
        <ul>
            <li><code>clip-path</code> masks parts of an element, exceeding the limitations of the deprecated <code>clip</code> property (rectangular clipping only).</li>
            <li>It supports basic shapes, geometry boxes, or SVG <code><clippath></code> URLs for complex shapes and animations.</li>
            <li>Animating <code>clip-path</code> requires matching vertex counts in initial and final shapes for smooth transitions.</li>
            <li>While not universally supported, major modern browsers (Chrome, Safari, Opera) support <code>clip-path</code> (often with prefixes). Firefox support is partial.</li>
        </ul>
    </div>

    <h2>The Basics</h2>
    <p>Clipping trims parts of an element, partially or fully hiding it.  The <i>clipping path</i> defines the visible region, whether a simple shape or a complex polygon.  The <i>clipping region</i> is the area within this path.  Anything outside is hidden, including backgrounds, borders, shadows, and events.</p>
    <p>Even with non-rectangular elements, surrounding content flows naturally. For shape-aware content flow, use the <code>shape-outside</code> property (see related SitePoint tutorial).</p>
    <p>Remember: <code>clip-path</code> differs from the limited, deprecated <code>clip</code> property.</p>

    <h2>Syntax and Usage</h2>
    <p>The syntax is: <code>clip-path: <clip-source> | [<basic-shape> || <geometry-box>] | none</code></p>
    <ul>
        <li><code><clip-source></code>: An SVG <code><clippath></code> URL.</li>
        <li><code><basic-shape></code>: Basic shape functions (CSS Shapes spec).</li>
        <li><code><geometry-box></code>: (Optional) Reference box for <code><basic-shape></code>, or defines the clipping shape itself (e.g., <code>margin-box</code>).</li>
    </ul>

    <div class="code-example">
        <pre class="brush:php;toolbar:false"><code>img {
  clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
}

ログイン後にコピー

これは菱形を作成します。頂点座標（x、y）は、要素のボックスに対して時計回りです。

geometry-box

ここで、margin-boxは参照です。 svg要素はfill-box、stroke-box、またはview-box。

clip-path

clip-pathテキストと画像を強化します。複雑な形状は簡単に達成できます。

画像ギャラリーとアバターは、非長方形の形状の恩恵を受けています。

アニメーションの追加

アニメーションclip-path、しかし、一貫した頂点数を維持してスムーズな遷移を維持します。

<code>@keyframes polygons { 25% { clip-path: polygon(20% 0%, 100% 38%, 70% 90%, 0% 100%); } 50% { clip-path: polygon(0 46%, 100% 15%, 55% 74%, 0 100%); } 70% { clip-path: polygon(100% 38%, 100% 38%, 66% 100%, 0 53%); } } </code>

CSSクリップパスプロパティとは何ですか？