Zum Inhaltsverzeichnis springen Dropdowns display a list of options that can be triggered by keyboard navigation, submenus and various customisation options.
A dropdown consists of a trigger and a panel. By default, activating the trigger will expose the panel and interacting outside of the panel will close it.
This component is designed to work well with dropdown items to provide a list of options the user can select from. However, dropdowns can also be used in low‐level applications. The API gives you complete control over showing, hiding and positioning the panel.
<pc-dropdown>
<pc-button slot="trigger">
Dropdown
<pc-icon
library="default"
icon-style="solid"
name="chevron-down"
slot="suffix"
></pc-icon>
</pc-button>
<pc-dropdown-item>
<pc-icon
library="default"
icon-style="solid"
name="scissors"
slot="icon"
></pc-icon>
Cut
</pc-dropdown-item>
<pc-dropdown-item>
<pc-icon
library="default"
icon-style="solid"
name="copy"
slot="icon"
></pc-icon>
Copy
</pc-dropdown-item>
<pc-dropdown-item>
<pc-icon
library="default"
icon-style="solid"
name="paste"
slot="icon"
></pc-icon>
Paste
</pc-dropdown-item>
<pc-divider></pc-divider>
<pc-dropdown-item>
Show images
<pc-dropdown-item
slot="submenu"
value="show-all-images"
>
Show all images
</pc-dropdown-item>
<pc-dropdown-item
slot="submenu"
value="show-thumbnails"
>
Show thumbnails
</pc-dropdown-item>
</pc-dropdown-item>
<pc-divider></pc-divider>
<pc-dropdown-item type="checkbox" checked>
Emoji shortcuts
</pc-dropdown-item>
<pc-dropdown-item type="checkbox" checked>
Word wrap
</pc-dropdown-item>
<pc-divider></pc-divider>
<pc-dropdown-item appearance="danger">
<pc-icon
library="default"
icon-style="solid"
name="trash"
slot="icon"
></pc-icon>
Delete
</pc-dropdown-item>
</pc-dropdown>
Getting the selected item
When an item is selected, the pc-select event will be emitted by the dropdown. You can inspect event.detail.item to get a reference to the selected item. If you’ve provided a value for each dropdown item, it will be available in event.detail.item.value.
<div class="dropdown-selection">
<pc-dropdown>
<pc-button slot="trigger">
View
<pc-icon
library="default"
icon-style="solid"
name="chevron-down"
slot="suffix"
></pc-icon>
</pc-button>
<pc-dropdown-item value="full-screen">Enter full screen</pc-dropdown-item>
<pc-dropdown-item value="actual-size">Actual size</pc-dropdown-item>
<pc-dropdown-item value="zoom-in">Zoom in</pc-dropdown-item>
<pc-dropdown-item value="zoom-out">Zoom out</pc-dropdown-item>
</pc-dropdown>
</div>
<script>
const container = document.querySelector(".dropdown-selection");
const dropdown = container.querySelector("pc-dropdown");
dropdown.addEventListener("pc-select", (event) => {
console.log(event.detail.item.value);
});
</script>
To keep the dropdown open after selection, call event.preventDefault() in the pc-select event’s callback.
Use the icon slot to add icons to dropdown items. This works best with the Icon component.
<pc-dropdown>
<pc-button slot="trigger">
Edit
<pc-icon
library="default"
icon-style="solid"
name="chevron-down"
slot="suffix"
></pc-icon>
</pc-button>
<pc-dropdown-item value="cut">
<pc-icon
library="default"
icon-style="solid"
name="scissors"
slot="icon"
></pc-icon>
Cut
</pc-dropdown-item>
<pc-dropdown-item value="copy">
<pc-icon
library="default"
icon-style="solid"
name="copy"
slot="icon"
></pc-icon>
Copy
</pc-dropdown-item>
<pc-dropdown-item value="paste">
<pc-icon
library="default"
icon-style="solid"
name="paste"
slot="icon"
></pc-icon>
Paste
</pc-dropdown-item>
<pc-dropdown-item appearance="danger" value="delete">
<pc-icon
library="default"
icon-style="solid"
name="trash"
slot="icon"
></pc-icon>
Delete
</pc-dropdown-item>
</pc-dropdown>
Showing labels and dividers
Use the <h1>–<h6> elements to add labels and the <pc-divider> element for dividers.
<pc-dropdown>
<pc-button slot="trigger">
Device
<pc-icon
library="default"
icon-style="solid"
name="chevron-down"
slot="suffix"
></pc-icon>
</pc-button>
<h3>Type</h3>
<pc-dropdown-item value="phone">Phone</pc-dropdown-item>
<pc-dropdown-item value="tablet">Tablet</pc-dropdown-item>
<pc-dropdown-item value="desktop">Desktop</pc-dropdown-item>
<pc-divider></pc-divider>
<pc-dropdown-item value="more-options">More options…</pc-dropdown-item>
</pc-dropdown>
Use the details slot to display details, such as keyboard shortcuts, inside dropdown items.
<pc-dropdown>
<pc-button slot="trigger">
Message
<pc-icon
library="default"
icon-style="solid"
name="chevron-down"
slot="suffix"
></pc-icon>
</pc-button>
<pc-dropdown-item value="reply">
Reply
<span slot="details">⌘ R</span>
</pc-dropdown-item>
<pc-dropdown-item value="reply-all">
Reply all
<span slot="details">⇧ ⌘ R</span>
</pc-dropdown-item>
<pc-dropdown-item value="forward">
Forward
<span slot="details">⌘ J</span>
</pc-dropdown-item>
<pc-dropdown-item value="move">
Move
<span slot="details">⌃ ⌘ V</span>
</pc-dropdown-item>
<pc-divider></pc-divider>
<pc-dropdown-item value="archive">
Archive
<span slot="details">⌃ ⌘ A</span>
</pc-dropdown-item>
<pc-dropdown-item appearance="danger" value="delete">
Delete
<span slot="details">⌘ ⌫</span>
</pc-dropdown-item>
</pc-dropdown>
You can turn a dropdown item into a checkable option by setting type="checkbox". Add the checked attribute to make it checked initially. When clicked, the item’s checked state will toggle and the dropdown will close. You can cancel the pc-select event if you want to keep it open instead.
<pc-dropdown class="dropdown-checkboxes">
<pc-button slot="trigger">
View
<pc-icon
library="default"
icon-style="solid"
name="chevron-down"
slot="suffix"
></pc-icon>
</pc-button>
<pc-dropdown-item
type="checkbox"
value="show-canvas"
checked
>
Show canvas
</pc-dropdown-item>
<pc-dropdown-item
type="checkbox"
value="show-grid"
checked
>
Show grid
</pc-dropdown-item>
<pc-dropdown-item
type="checkbox"
value="show-source"
>
Show source
</pc-dropdown-item>
<pc-divider></pc-divider>
<pc-dropdown-item value="preferences">Preferences…</pc-dropdown-item>
</pc-dropdown>
<script>
const dropdown = document.querySelector(".dropdown-checkboxes");
dropdown.addEventListener("pc-select", (event) => {
if (event.detail.item.type === "checkbox") {
console.log(
event.detail.item.value,
event.detail.item.checked ? "checked" : "unchecked"
);
} else {
console.log(event.detail.item.value);
}
});
</script>
When a checkable option exists anywhere in the dropdown, all items will receive additional padding so they align properly.
Add appearance="danger" to any dropdown item to highlight it’s a dangerous action.
<pc-dropdown>
<pc-button slot="trigger">
Project
<pc-icon
library="default"
icon-style="solid"
name="chevron-down"
slot="suffix"
></pc-icon>
</pc-button>
<pc-dropdown-item value="share">
<pc-icon
library="default"
icon-style="solid"
name="share"
slot="icon"
></pc-icon>
Share
</pc-dropdown-item>
<pc-dropdown-item value="preferences">
<pc-icon
library="default"
icon-style="solid"
name="gear"
slot="icon"
></pc-icon>
Preferences
</pc-dropdown-item>
<pc-divider></pc-divider>
<h3>Danger zone</h3>
<pc-dropdown-item value="archive">
<pc-icon
library="default"
icon-style="solid"
name="archive"
slot="icon"
></pc-icon>
Archive
</pc-dropdown-item>
<pc-dropdown-item appearance="danger" value="delete">
<pc-icon
library="default"
icon-style="solid"
name="trash"
slot="icon"
></pc-icon>
Delete
</pc-dropdown-item>
</pc-dropdown>
The preferred placement of the dropdown can be set with the placement attribute. Note: The actual position may vary to ensure the panel remains in the viewport.
<pc-dropdown placement="right-start">
<pc-button slot="trigger">
File formats
<pc-icon
library="default"
icon-style="solid"
name="chevron-right"
slot="suffix"
></pc-icon>
</pc-button>
<pc-dropdown-item value="pdf">PDF document (.pdf)</pc-dropdown-item>
<pc-dropdown-item value="docx">Word document (.docx)</pc-dropdown-item>
<pc-dropdown-item value="xlsx">Excel spreadsheet (.xlsx)</pc-dropdown-item>
<pc-dropdown-item value="pptx">PowerPoint presentation (.pptx)</pc-dropdown-item>
<pc-dropdown-item value="txt">Plain Text (.txt)</pc-dropdown-item>
<pc-dropdown-item value="json">JSON file (.json)</pc-dropdown-item>
</pc-dropdown>
The distance from the panel to the trigger can be customised using the distance attribute. This value is specified in pixels.
<pc-dropdown distance="30">
<pc-button slot="trigger">
Edit
<pc-icon
library="default"
icon-style="solid"
name="chevron-down"
slot="suffix"
></pc-icon>
</pc-button>
<pc-dropdown-item>Cut</pc-dropdown-item>
<pc-dropdown-item>Copy</pc-dropdown-item>
<pc-dropdown-item>Paste</pc-dropdown-item>
<pc-divider></pc-divider>
<pc-dropdown-item>Find</pc-dropdown-item>
<pc-dropdown-item>Replace</pc-dropdown-item>
</pc-dropdown>
The skidding of the panel along the trigger can be customised using the skidding attribute. This value is specified in pixels.
<pc-dropdown skidding="30">
<pc-button slot="trigger">
Edit
<pc-icon
library="default"
icon-style="solid"
name="chevron-down"
slot="suffix"
></pc-icon>
</pc-button>
<pc-dropdown-item>Cut</pc-dropdown-item>
<pc-dropdown-item>Copy</pc-dropdown-item>
<pc-dropdown-item>Paste</pc-dropdown-item>
<pc-divider></pc-divider>
<pc-dropdown-item>Find</pc-dropdown-item>
<pc-dropdown-item>Replace</pc-dropdown-item>
</pc-dropdown>
To create submenus, nest dropdown items inside of a dropdown item and assign slot="submenu" to each one. You can also add dividers as needed.
<pc-dropdown class="dropdown-submenus">
<pc-button slot="trigger">
Export
<pc-icon
library="default"
icon-style="solid"
name="chevron-down"
slot="suffix"
></pc-icon>
</pc-button>
<pc-dropdown-item>
Documents
<pc-dropdown-item slot="submenu" value="pdf">PDF document (.pdf)</pc-dropdown-item>
<pc-dropdown-item slot="submenu" value="docx">Word document (.docx)</pc-dropdown-item>
<pc-dropdown-item slot="submenu" value="doc">Word 97–2003 document (.doc)</pc-dropdown-item>
</pc-dropdown-item>
<pc-dropdown-item>
Spreadsheets
<pc-dropdown-item slot="submenu" value="xlsx">Excel spreadsheet (.xlsx)</pc-dropdown-item>
<pc-dropdown-item slot="submenu" value="xls">Excel 97–2003 spreadsheet (.xls)</pc-dropdown-item>
<pc-dropdown-item slot="submenu" value="ods">OpenDocument spreadsheet (.ods)</pc-dropdown-item>
<pc-dropdown-item slot="submenu" value="numbers">Numbers spreadsheet (.numbers)</pc-dropdown-item>
<pc-divider slot="submenu"></pc-divider>
<pc-dropdown-item slot="submenu" value="csv">CSV spreadsheet (.csv)</pc-dropdown-item>
<pc-dropdown-item slot="submenu" value="tsv">Tab‐separated values (.tsv)</pc-dropdown-item>
<pc-dropdown-item slot="submenu" value="json">JSON file (.json)</pc-dropdown-item>
</pc-dropdown-item>
<pc-divider></pc-divider>
<pc-dropdown-item>
Options
<pc-dropdown-item
slot="submenu"
type="checkbox"
value="compress-files"
>
Compress files
</pc-dropdown-item>
<pc-dropdown-item
slot="submenu"
type="checkbox"
value="include-metadata"
checked
>
Include metadata
</pc-dropdown-item>
<pc-dropdown-item
slot="submenu"
type="checkbox"
value="password-protect"
>
Password protect
</pc-dropdown-item>
</pc-dropdown-item>
</pc-dropdown>
<script>
const dropdown = document.querySelector(".dropdown-submenus");
dropdown.addEventListener("pc-select", (event) => {
console.log(event.detail.item.value);
});
</script>
Dropdown items that have a submenu will not dispatch the pc-select event. However, items inside the submenu will, unless they also have a submenu.
As a UX best practice, avoid using more than one level of submenu when possible.
Add the disabled attribute to any dropdown item to disable it.
<pc-dropdown>
<pc-button slot="trigger">
Payment method
<pc-icon
library="default"
icon-style="solid"
name="chevron-down"
slot="suffix"
></pc-icon>
</pc-button>
<pc-dropdown-item value="cash">Cash</pc-dropdown-item>
<pc-dropdown-item value="personal-check" disabled>Personal check</pc-dropdown-item>
<pc-dropdown-item value="credit-card">Credit/debit card</pc-dropdown-item>
<pc-dropdown-item value="gift-card">Gift card</pc-dropdown-item>
</pc-dropdown>
| Name | Beschreibung | Reflektiert | Standard |
|---|
open | Opens or closes the dropdown.
Typ: boolean |
| false |
size | The dropdown’s size.
Typ: "small" | "medium" | "large" |
| "medium" |
placement | The placement of the dropdown menu in reference to the trigger. The menu will shift to a more optimal location if the preferred placement doesn’t have enough room.
Typ: "top"
| "top-start"
| "top-end"
| "bottom"
| "bottom-start"
| "bottom-end"
| "right"
| "right-start"
| "right-end"
| "left"
| "left-start"
| "left-end" |
| "bottom-start" |
distance | The distance of the dropdown menu from its trigger.
Typ: number |
| 0 |
skidding | The skidding of the dropdown menu along its trigger.
Typ: number |
| 0 |
updateComplete |
Ein schreibgeschütztes Promise, das erfüllt ist,
sobald die Komponente
fertig aktualisiert wurde.
| | ‐ |
Erfahre mehr über Attribute und Eigenschaften.
| Name | Beschreibung |
|---|
| (Standard) | The dropdown’s items, typically <pc-dropdown-item> elements. |
trigger | The element that triggers the dropdown, such as a <pc-button> or <button>. |
Erfahre mehr über die Benutzung von Slots.
| Name | Beschreibung | Event‐Detail |
|---|
pc-show | Emitted when the dropdown is about to show. | ‐ |
pc-after-show | Emitted when the dropdown has been shown. | ‐ |
pc-hide | Emitted when the dropdown is about to hide. | ‐ |
pc-after-hide | Emitted when the dropdown has been hidden. | ‐ |
pc-select | Emitted when an item in the dropdown is selected. | ‐ |
Erfahre mehr über Events.
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kannst du diesen Abschnitt überspringen. Falls du
„Cherry Picking“ betreibst, kannst du die folgenden
Snippets verwenden, um diese Komponente zu importieren.
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Um diese Komponente manuell vom CDN zu importieren,
kannst du dieses Code‐Snippet kopieren und es in dein HTML einfügen.
<script type="module" src="https://cdn.jsdelivr.net/npm/placer-toolkit@1.0.0-alpha.3/cdn/components/dropdown/dropdown.js"></script>
Um diese Komponente manuell vom CDN zu importieren, kannst du
dieses Code‐Snippet kopieren und es in deine JavaScript‐Datei einfügen.
import "https://cdn.jsdelivr.net/npm/placer-toolkit@1.0.0-alpha.3/cdn/components/dropdown/dropdown.js";
Um diese Komponente manuell von npm zu importieren, kannst du
dieses Code‐Snippet kopieren und es in deine JavaScript‐Datei einfügen.
import "placer-toolkit/dist/components/dropdown/dropdown.js";
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