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124 lines
3.7 KiB
HTML
124 lines
3.7 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8" />
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<meta http-equiv="X-UA-Compatible" content="IE=edge" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<title>Web Accessible Resources - Readme</title>
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<style>
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body {
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font-family: Helvetica, Arial, sans-serif;
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font-size: 14px;
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}
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table {
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padding: 0;
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border-collapse: collapse;
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}
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th {
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background: hsl(0, 0%, 90%);
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padding: 0.25em 0.5em;
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text-align: left;
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}
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td {
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padding: 0.25em 0.5em;
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border-top: 1px solid hsl(0, 0%, 50%);
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}
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</style>
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</head>
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<body>
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<h1>Web Accessible Resources Demo</h1>
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<p>This demo shows off the core features of web accessible resources.</p>
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<p>
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In this demo we have 4 images (test1.png, etc.) that we want to expose on
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2 different websites. Each website should only be able to load two
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specific images, but both websites will attempt to access all 4 images. To
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do this, we define a set of
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<a
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href="https://developer.chrome.com/docs/extensions/mv3/manifest/web_accessible_resources/"
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><code>"web_accessable_resources"</code></a
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>
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in our <a href="manifest.json">manifest.json</a>. This object specifies
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what assets should be accessible to which external resources.
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</p>
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<p>
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The first image on each site is statically referenced by the site using a
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URL in the following format:
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<code>chrome-extension://<extension-id>/<image-path></code>. The
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second image on each site will only be injected into the page when you
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click the "Load images" button for that page. This injection is performed
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by using
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<a
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href="https://developer.chrome.com/docs/extensions/reference/runtime/#method-getURL"
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>chrome.runtime.getURL()</a
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>
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to build the image's URL at runtime.
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</p>
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<table>
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<thead>
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<tr>
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<th>File</th>
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<th>Target domain</th>
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<th>Injection method</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td>
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<code><a href="test1.png">test1.png</a></code>
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</td>
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<td>web-accessible-resources-1.glitch.me</td>
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<td>Statically referenced</td>
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</tr>
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<tr>
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<td>
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<code><a href="test2.png">test2.png</a></code>
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</td>
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<td>web-accessible-resources-1.glitch.me</td>
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<td>Dynamically injected</td>
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</tr>
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<tr>
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<td>
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<code><a href="test3.png">test3.png</a></code>
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</td>
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<td>web-accessible-resources-2.glitch.me</td>
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<td>Statically referenced</td>
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</tr>
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<tr>
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<td>
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<code><a href="test4.png">test4.png</a></code>
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</td>
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<td>web-accessible-resources-2.glitch.me</td>
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<td>Dynamically injected</td>
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</tr>
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</tbody>
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</table>
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<figure>
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<figcaption>
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https://web-accessible-resources-1.glitch.me/ can access images
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<a href="test1.png"><code>test1.png</code></a> and
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<a href="test2.png"><code>test2.png</code></a>
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</figcaption>
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<iframe
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src="https://web-accessible-resources-1.glitch.me/"
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width="100%"
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height="200"
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></iframe>
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</figure>
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<figure>
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<figcaption>
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https://web-accessible-resources-2.glitch.me/ can access images
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<a href="test3.png"><code>test3.png</code></a> and
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<a href="test4.png"><code>test4.png</code></a>
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</figcaption>
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<iframe
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src="https://web-accessible-resources-2.glitch.me/"
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width="100%"
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height="200"
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></iframe>
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</figure>
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</body>
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</html>
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