Tab Panels with amp-selector
Introduction
This is an implementation of tab panels that uses amp-selector. Tabs and tab panels are positioned via flexbox and amp-selector uses the selected attribute to show/hide the correct tab panel and style the selected tab.
Setup
Import amp-selector component in the header which we'll use to implement the tab switching.
<script async custom-element="amp-selector" src="https://cdn.ampproject.org/v0/amp-selector-0.1.js"></script>
There's just a bit of CSS that's needed.
<style amp-custom>
:root {
--color-primary: #005AF0;
--space-1: .5rem; /* 8px */
--space-4: 2rem; /* 32px */
}
/* Styles for the flex layout based tabs */
amp-selector[role=tablist].tabs-with-flex {
display: flex;
flex-wrap: wrap;
}
amp-selector[role=tablist].tabs-with-flex [role=tab] {
flex-grow: 1;
/* custom styling, feel free to change */
text-align: center;
padding: var(--space-1);
}
amp-selector[role=tablist].tabs-with-flex [role=tab][selected] {
outline: none;
/* custom styling, feel free to change */
border-bottom: 2px solid var(--color-primary);
}
amp-selector[role=tablist].tabs-with-flex [role=tabpanel] {
display: none;
width: 100%;
order: 1; /* must be greater than the order of the tab buttons to flex to the next line */
/* custom styling, feel free to change */
padding: var(--space-4);
}
amp-selector[role=tablist].tabs-with-flex [role=tab][selected] + [role=tabpanel] {
display: block;
}
/* Styles for the selector based tabs */
amp-selector[role=tablist].tabs-with-selector {
display: flex;
}
amp-selector[role=tablist].tabs-with-selector [role=tab][selected] {
outline: none;
/* custom styling, feel free to change */
border-bottom: 2px solid var(--color-primary);
}
amp-selector[role=tablist].tabs-with-selector {
display: flex;
}
amp-selector[role=tablist].tabs-with-selector [role=tab] {
/* custom styling, feel free to change */
width: 100%;
text-align: center;
padding: var(--space-1);
}
amp-selector.tabpanels [role=tabpanel] {
display: none;
/* custom styling, feel free to change */
padding: var(--space-4);
}
amp-selector.tabpanels [role=tabpanel][selected] {
outline: none;
display: block;
}
</style>
Simple tabs using a flex layout
This is the most basic example with three panels. Each tabpanel is defined below it's tab and is hidden by default. Only if a tab is selected, the tabpanel is set to visible via the following CSS rule:
amp-selector[role=tablist] [role=tab][selected] + [role=tabpanel] { display: block; }
The tab content is positioned below the tab button using a flex layout.
<amp-selector class="tabs-with-flex" role="tablist" keyboard-select-mode="focus">
<div id="tab1" role="tab" aria-controls="tabpanel1" option selected>Tab one</div>
<div id="tabpanel1" role="tabpanel" aria-labelledby="tab1">Tab one content... </div>
<div id="tab2" role="tab" aria-controls="tabpanel2" option>Tab two</div>
<div id="tabpanel2" role="tabpanel" aria-labelledby="tab2">Tab two content... </div>
<div id="tab3" role="tab" aria-controls="tabpanel3" option>Tab three</div>
<div id="tabpanel3" role="tabpanel" aria-labelledby="tab3">Tab three content... </div>
</amp-selector>
Selecting a tab via a button
We can use the amp-selector's toggle action to activate specific tabs: on="tap:myTabs.toggle(index=0, value=true)".
<button on="tap:myTabs.toggle(index=0, value=true)">Select tab 1</button>
<button on="tap:myTabs.toggle(index=1, value=true)">Select tab 2</button>
<button on="tap:myTabs.toggle(index=2, value=true)">Select tab 3</button>
<amp-selector id="myTabs" class="tabs-with-flex" role="tablist" keyboard-select-mode="focus">
<div id="sample2-tab1" role="tab" aria-controls="sample2-tabpanel1" option selected>Tab one</div>
<div id="sample2-tabpanel1" role="tabpanel" aria-labelledby="sample2-tab1">Tab one content... </div>
<div id="sample2-tab2" role="tab" aria-controls="sample2-tabpanel2" option>Tab two</div>
<div id="sample2-tabpanel2" role="tabpanel" aria-labelledby="sample2-tab2">Tab two content... </div>
<div id="sample2-tab3" role="tab" aria-controls="sample2-tabpanel3" option>Tab three</div>
<div id="sample2-tabpanel3" role="tabpanel" aria-labelledby="sample2-tab3">Tab three content... </div>
</amp-selector>
A more flexible tab layout with two amp-selectors
If for any reason, the flex layout based approach is not feasible, it's possible to implement tabs and tabpanels using two different amp-selectors.
<amp-selector class="tabs-with-selector" role="tablist" on="select:myTabPanels.toggle(index=event.targetOption, value=true)" keyboard-select-mode="focus">
<div id="sample3-tab1" role="tab" aria-controls="sample3-tabpanel1" option="0" selected>Tab one</div>
<div id="sample3-tab2" role="tab" aria-controls="sample3-tabpanel2" option="1">Tab two</div>
<div id="sample3-tab3" role="tab" aria-controls="sample3-tabpanel3" option="2">Tab three</div>
</amp-selector>
<amp-selector id="myTabPanels" class="tabpanels">
<div id="sample3-tabpanel1" role="tabpanel" aria-labelledby="sample3-tab1" option selected>Tab one content... </div>
<div id="sample3-tabpanel2" role="tabpanel" aria-labelledby="sample3-tab2" option>Tab two content... </div>
<div id="sample3-tabpanel3" role="tabpanel" aria-labelledby="sample3-tab3" option>Tab three content... </div>
</amp-selector>
Jeśli przedstawione tutaj wyjaśnienia nie odpowiadają na wszystkie pytania, skontaktuj się z innymi użytkownikami AMP, aby omówić daną przykładową realizację.
Przejdź do Stack Overflow Niewyjaśniona funkcja?Zdecydowanie zachęcamy do wzięcia udziału! Choć mamy nadzieję, że staniesz się stałym uczestnikiem naszej społeczności open source, to z wdzięcznością przyjmiemy również każdy jednorazowy wkład w kwestie, które są Twoją pasją.
Edytuj przykład na GitHub-