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Ninfa-Jeon merged 2 commits into from
Feb 27, 2026
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docs: add proper example for code snippet multi-dropdown #5762

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docs: add proper example for code snippet multi-dropdown
Ninfa-Jeon Feb 26, 2026
b398386
a11y: add aria-labels to select
Ninfa-Jeon Feb 27, 2026
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100 changes: 69 additions & 31 deletions templates/docs/examples/patterns/code-snippet/_dropdown-multiple.html
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Original file line number Diff line number Diff line change
Expand Up @@ -3,72 +3,110 @@
<h5 class="p-code-snippet__title">Installing Thunderbird as a snap</h5>

<div class="p-code-snippet__dropdowns">
<select class="p-code-snippet__dropdown" name="menu1-select" id="menu1-select">
<option value="">amd64</option>
<option value="">i386</option>
<select class="p-code-snippet__dropdown" name="track-select-1" id="track-select-1" aria-label="Track">
<option value="latest-track-1">latest</option>
<option value="esr-track-1">esr</option>
<option value="monthly-track-1">monthly</option>
</select>

<select class="p-code-snippet__dropdown" name="menu2-select" id="menu2-select">
<option value="stable-panel">stable</option>
<option value="beta-panel">beta</option>
<option value="edge-panel">edge</option>
<select class="p-code-snippet__dropdown" name="latest-track-1" id="latest-track-1" aria-label="Channel">
<option value="latest-stable-1">stable</option>
<option value="latest-candidate-1">candidate</option>
</select>

<select class="p-code-snippet__dropdown u-hide" name="esr-track-1" id="esr-track-1" aria-hidden="true" aria-label="Channel">
<option value="esr-stable-1">stable</option>
<option value="esr-candidate-1">candidate</option>
</select>

<select class="p-code-snippet__dropdown u-hide" name="monthly-track-1" id="monthly-track-1" aria-hidden="true" aria-label="Channel">
<option value="monthly-beta-1">beta</option>
<option value="monthly-candidate-1">candidate</option>
</select>
</div>
</div>

<pre id="stable-panel" class="p-code-snippet__block--icon"><code>sudo snap install thunderbird</code></pre>
<pre id="latest-stable-1" class="p-code-snippet__block--icon"><code>sudo snap install thunderbird --channel=latest/stable</code></pre>

<pre id="latest-candidate-1" class="p-code-snippet__block--icon u-hide" aria-hidden="true"><code>sudo snap install thunderbird --channel=latest/candidate</code></pre>

<pre id="beta-panel" class="p-code-snippet__block--icon u-hide" aria-hidden="true"><code>sudo snap install thunderbird --beta</code></pre>
<pre id="esr-stable-1" class="p-code-snippet__block--icon u-hide" aria-hidden="true"><code>sudo snap install thunderbird --channel=esr/stable</code></pre>

<pre id="edge-panel" class="p-code-snippet__block--icon u-hide" aria-hidden="true"><code>sudo snap install thunderbird --edge</code></pre>
<pre id="esr-candidate-1" class="p-code-snippet__block--icon u-hide" aria-hidden="true"><code>sudo snap install thunderbird --channel=esr/candidate</code></pre>

<pre id="monthly-beta-1" class="p-code-snippet__block--icon u-hide" aria-hidden="true"><code>sudo snap install thunderbird --channel=monthly/beta</code></pre>

<pre id="monthly-candidate-1" class="p-code-snippet__block--icon u-hide" aria-hidden="true"><code>sudo snap install thunderbird --channel=monthly/candidate</code></pre>
</div>

<div class="p-code-snippet">
<div class="p-code-snippet__header">
<div class="p-code-snippet__dropdowns">
<select class="p-code-snippet__dropdown" name="menu1-select" id="menu1-select">
<option value="">amd64</option>
<option value="">i386</option>
<select class="p-code-snippet__dropdown" name="track-select-2" id="track-select-2" aria-label="Track">
<option value="latest-track-2">latest</option>
<option value="esr-track-2">esr</option>
<option value="monthly-track-2">monthly</option>
</select>

<select class="p-code-snippet__dropdown" name="latest-track-2" id="latest-track-2" aria-label="Channel">
<option value="latest-stable-2">stable</option>
<option value="latest-candidate-2">candidate</option>
</select>

<select class="p-code-snippet__dropdown" name="menu2-select" id="menu2-select">
<option value="headerless-stable-panel">stable</option>
<option value="headerless-beta-panel">beta</option>
<option value="headerless-edge-panel">edge</option>
<select class="p-code-snippet__dropdown u-hide" name="esr-track-2" id="esr-track-2" aria-hidden="true" aria-label="Channel">
<option value="esr-stable-2">stable</option>
<option value="esr-candidate-2">candidate</option>
</select>

<select class="p-code-snippet__dropdown u-hide" name="monthly-track-2" id="monthly-track-2" aria-hidden="true" aria-label="Channel">
<option value="monthly-beta-2">beta</option>
<option value="monthly-candidate-2">candidate</option>
</select>
</div>
</div>

<pre id="headerless-stable-panel" class="p-code-snippet__block--icon"><code>sudo snap install thunderbird</code></pre>
<pre id="latest-stable-2" class="p-code-snippet__block--icon"><code>sudo snap install thunderbird --channel=latest/stable</code></pre>

<pre id="latest-candidate-2" class="p-code-snippet__block--icon u-hide" aria-hidden="true"><code>sudo snap install thunderbird --channel=latest/candidate</code></pre>

<pre id="esr-stable-2" class="p-code-snippet__block--icon u-hide" aria-hidden="true"><code>sudo snap install thunderbird --channel=esr/stable</code></pre>

<pre id="headerless-beta-panel" class="p-code-snippet__block--icon u-hide" aria-hidden="true"><code>sudo snap install thunderbird --beta</code></pre>
<pre id="esr-candidate-2" class="p-code-snippet__block--icon u-hide" aria-hidden="true"><code>sudo snap install thunderbird --channel=esr/candidate</code></pre>

<pre id="headerless-edge-panel" class="p-code-snippet__block--icon u-hide" aria-hidden="true"><code>sudo snap install thunderbird --edge</code></pre>
<pre id="monthly-beta-2" class="p-code-snippet__block--icon u-hide" aria-hidden="true"><code>sudo snap install thunderbird --channel=monthly/beta</code></pre>

<pre id="monthly-candidate-2" class="p-code-snippet__block--icon u-hide" aria-hidden="true"><code>sudo snap install thunderbird --channel=monthly/candidate</code></pre>
</div>

<div class="p-code-snippet">
<div class="p-code-snippet__header is-stacked">
<h5 class="p-code-snippet__title">Installing Thunderbird as a snap on different architectures via the command line</h5>
<h5 class="p-code-snippet__title">Installing Thunderbird as a snap on different tracks via the command line</h5>

<div class="p-code-snippet__dropdowns">
<select class="p-code-snippet__dropdown" name="menu3-select" id="menu3-select">
<option value="">amd64</option>
<option value="">i386</option>
<select class="p-code-snippet__dropdown" name="track-select-3" id="track-select-3" aria-label="Track">
<option value="latest-track-3">latest</option>
<option value="esr-track-3">esr</option>
</select>

<select class="p-code-snippet__dropdown" name="latest-track-3" id="latest-track-3" aria-label="Channel">
<option value="latest-stable-3">stable</option>
<option value="latest-beta-3">beta</option>
<option value="latest-candidate-3">candidate</option>
</select>

<select class="p-code-snippet__dropdown" name="menu4-select" id="menu4-select">
<option value="stacked-stable-panel">stable</option>
<option value="stacked-beta-panel">beta</option>
<option value="stacked-edge-panel">edge</option>
<select class="p-code-snippet__dropdown u-hide" name="esr-track-3" id="esr-track-3" aria-hidden="true" aria-label="Channel">
<option value="esr-edge-3">edge</option>
</select>
</div>
</div>

<pre id="stacked-stable-panel" class="p-code-snippet__block--icon"><code>sudo snap install thunderbird</code></pre>
<pre id="latest-stable-3" class="p-code-snippet__block--icon"><code>sudo snap install thunderbird --channel=latest/stable</code></pre>

<pre id="latest-candidate-3" class="p-code-snippet__block--icon u-hide" aria-hidden="true"><code>sudo snap install thunderbird --channel=latest/candidate</code></pre>

<pre id="stacked-beta-panel" class="p-code-snippet__block--icon u-hide" aria-hidden="true"><code>sudo snap install thunderbird --beta</code></pre>
<pre id="latest-beta-3" class="p-code-snippet__block--icon u-hide" aria-hidden="true"><code>sudo snap install thunderbird --channel=latest/beta</code></pre>

<pre id="stacked-edge-panel" class="p-code-snippet__block--icon u-hide" aria-hidden="true"><code>sudo snap install thunderbird --edge</code></pre>
<pre id="esr-edge-3" class="p-code-snippet__block--icon u-hide" aria-hidden="true"><code>sudo snap install thunderbird --channel=esr/edge</code></pre>
</div>

<script>
Expand Down
38 changes: 35 additions & 3 deletions templates/docs/examples/patterns/code-snippet/_script.js
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Original file line number Diff line number Diff line change
Expand Up @@ -7,7 +7,37 @@ function attachDropdownEvents(dropdown) {
var targetElement = document.getElementById(e.target.value);

if (targetElement) {
toggleElement(targetElement, dropdown.options);
// Check if target is another dropdown (cascading dropdowns)
if (targetElement.tagName === 'SELECT') {
// Find the container with all dropdowns
var container = dropdown.closest('.p-code-snippet__dropdowns');

// Hide all panels from all code snippet dropdowns in this group
var allChannelDropdowns = container.querySelectorAll('.p-code-snippet__dropdown');
allChannelDropdowns.forEach(function (channelDropdown) {
for (var i = 0; i < channelDropdown.options.length; i++) {
var panel = document.getElementById(channelDropdown.options[i].value);
if (panel && panel.tagName !== 'SELECT') {
panel.classList.add('u-hide');
panel.setAttribute('aria-hidden', true);
}
}
});

// Toggle between channel dropdowns
toggleElement(targetElement, dropdown.options);

// Show the panel for the newly visible dropdown's selected option
var panelId = targetElement.value;
var panelElement = document.getElementById(panelId);
if (panelElement && panelElement.tagName !== 'SELECT') {
panelElement.classList.remove('u-hide');
panelElement.setAttribute('aria-hidden', false);
}
} else {
// Target is a code panel
toggleElement(targetElement, dropdown.options);
}
}
});
}
Expand All @@ -21,8 +51,10 @@ function attachDropdownEvents(dropdown) {
function toggleElement(targetElement, options) {
for (var i = 0; i < options.length; i++) {
var element = document.getElementById(options[i].value);
element.classList.add('u-hide');
element.setAttribute('aria-hidden', true);
if (element) {
element.classList.add('u-hide');
element.setAttribute('aria-hidden', true);
}
}

targetElement.classList.remove('u-hide');
Expand Down