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<title>Web Accessible Resources - Readme</title>
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<h1>Web Accessible Resources Demo</h1>
<p>This demo shows off the core features of web accessible resources.</p>
<p>
In this demo we have 4 images (test1.png, etc.) that we want to expose on
2 different websites. Each website should only be able to load two
specific images, but both websites will attempt to access all 4 images. To
do this, we define a set of
<a
href="https://developer.chrome.com/docs/extensions/mv3/manifest/web_accessible_resources/"
><code>"web_accessable_resources"</code></a
>
in our <a href="manifest.json">manifest.json</a>. This object specifies
what assets should be accessible to which external resources.
</p>
<p>
The first image on each site is statically referenced by the site using a
URL in the following format:
<code>chrome-extension://<extension-id>/<image-path></code>. The
second image on each site will only be injected into the page when you
click the "Load images" button for that page. This injection is performed
by using
<a
href="https://developer.chrome.com/docs/extensions/reference/runtime/#method-getURL"
>chrome.runtime.getURL()</a
>
to build the image's URL at runtime.
</p>
<table>
<thead>
<tr>
<th>File</th>
<th>Target domain</th>
<th>Injection method</th>
</tr>
</thead>
<tbody>
<tr>
<td>
<code><a href="test1.png">test1.png</a></code>
</td>
<td>web-accessible-resources-1.glitch.me</td>
<td>Statically referenced</td>
</tr>
<tr>
<td>
<code><a href="test2.png">test2.png</a></code>
</td>
<td>web-accessible-resources-1.glitch.me</td>
<td>Dynamically injected</td>
</tr>
<tr>
<td>
<code><a href="test3.png">test3.png</a></code>
</td>
<td>web-accessible-resources-2.glitch.me</td>
<td>Statically referenced</td>
</tr>
<tr>
<td>
<code><a href="test4.png">test4.png</a></code>
</td>
<td>web-accessible-resources-2.glitch.me</td>
<td>Dynamically injected</td>
</tr>
</tbody>
</table>
<figure>
<figcaption>
https://web-accessible-resources-1.glitch.me/ can access images
<a href="test1.png"><code>test1.png</code></a> and
<a href="test2.png"><code>test2.png</code></a>
</figcaption>
<iframe
src="https://web-accessible-resources-1.glitch.me/"
width="100%"
height="200"
></iframe>
</figure>
<figure>
<figcaption>
https://web-accessible-resources-2.glitch.me/ can access images
<a href="test3.png"><code>test3.png</code></a> and
<a href="test4.png"><code>test4.png</code></a>
</figcaption>
<iframe
src="https://web-accessible-resources-2.glitch.me/"
width="100%"
height="200"
></iframe>
</figure>
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