npm:@spectrum-web-components/dropdown

README

Description

An <sp-dropdown> is an alternative to HTML's <select> element. Use an <sp-menu> element to outline the options that will be made available to the user when interacting with the <sp-dropdown> element.

Usage

yarn add @spectrum-web-components/dropdown

Import the side effectful registration of <sp-dropdown> via:

import '@spectrum-web-components/dropdown/sp-dropdown.js';

The default of <sp-dropdown> will load dependencies in @spectrum-web-components/overlay asynchronously via a dynamic import. In the case that you would like to import those tranverse dependencies statically, import the side effectful registration of <sp-dropdown> as follows:

import '@spectrum-web-components/dropdown/sync/sp-dropdown.js';

When looking to leverage the Dropdown base class as a type and/or for extension purposes, do so via:

import { Dropdown } from '@spectrum-web-components/dropdown';

Example

<p><strong>Standard:</strong></p>
<sp-dropdown label="Select a Country with a very long label, too long in fact">
    <sp-menu>
        <sp-menu-item>
            Deselect
        </sp-menu-item>
        <sp-menu-item>
            Select inverse
        </sp-menu-item>
        <sp-menu-item>
            Feather...
        </sp-menu-item>
        <sp-menu-item>
            Select and mask...
        </sp-menu-item>
        <sp-menu-divider></sp-menu-divider>
        <sp-menu-item>
            Save selection
        </sp-menu-item>
        <sp-menu-item disabled>
            Make work path
        </sp-menu-item>
    </sp-menu>
</sp-dropdown>
<br />
<br />
<p><strong>Quiet:</strong></p>
<sp-dropdown
    label="Select a Country with a very long label, too long in fact"
    quiet
>
    <sp-menu>
        <sp-menu-item>
            Deselect
        </sp-menu-item>
        <sp-menu-item>
            Select inverse
        </sp-menu-item>
        <sp-menu-item>
            Feather...
        </sp-menu-item>
        <sp-menu-item>
            Select and mask...
        </sp-menu-item>
        <sp-menu-divider></sp-menu-divider>
        <sp-menu-item>
            Save selection
        </sp-menu-item>
        <sp-menu-item disabled>
            Make work path
        </sp-menu-item>
    </sp-menu>
</sp-dropdown>

Value

When the value of an <sp-dropdown> matches the value attribute or the trimmed textContent (or itemText) of a descendent <sp-menu-item> element, it will make that element as selected.

Matching `value`

<sp-dropdown
    label="Select a Country with a very long label, too long in fact"
    value="item-2"
>
    <sp-menu>
        <sp-menu-item value="item-1">
            Deselect
        </sp-menu-item>
        <sp-menu-item value="item-2">
            Select inverse
        </sp-menu-item>
        <sp-menu-item value="item-3">
            Feather...
        </sp-menu-item>
        <sp-menu-item value="item-4">
            Select and mask...
        </sp-menu-item>
        <sp-menu-divider></sp-menu-divider>
        <sp-menu-item value="item-5">
            Save selection
        </sp-menu-item>
        <sp-menu-item disabled value="item-6">
            Make work path
        </sp-menu-item>
    </sp-menu>
</sp-dropdown>

Matching `itemText`

<sp-dropdown
    label="Select a Country with a very long label, too long in fact"
    value="Feather..."
>
    <sp-menu>
        <sp-menu-item>
            Deselect
        </sp-menu-item>
        <sp-menu-item>
            Select inverse
        </sp-menu-item>
        <sp-menu-item>
            Feather...
        </sp-menu-item>
        <sp-menu-item>
            Select and mask...
        </sp-menu-item>
        <sp-menu-divider></sp-menu-divider>
        <sp-menu-item>
            Save selection
        </sp-menu-item>
        <sp-menu-item>
            Make work path
        </sp-menu-item>
    </sp-menu>
</sp-dropdown>

States

Invalid

<p><strong>Standard:</strong></p>
<sp-dropdown
    label="Select a Country with a very long label, too long in fact"
    invalid
>
    <sp-menu>
        <sp-menu-item>
            Deselect
        </sp-menu-item>
        <sp-menu-item>
            Select inverse
        </sp-menu-item>
        <sp-menu-item>
            Feather...
        </sp-menu-item>
        <sp-menu-item>
            Select and mask...
        </sp-menu-item>
        <sp-menu-divider></sp-menu-divider>
        <sp-menu-item>
            Save selection
        </sp-menu-item>
        <sp-menu-item disabled>
            Make work path
        </sp-menu-item>
    </sp-menu>
</sp-dropdown>
<br />
<br />
<p><strong>Quiet:</strong></p>
<sp-dropdown
    label="Select a Country with a very long label, too long in fact"
    invalid
    quiet
>
    <sp-menu>
        <sp-menu-item>
            Deselect
        </sp-menu-item>
        <sp-menu-item>
            Select inverse
        </sp-menu-item>
        <sp-menu-item>
            Feather...
        </sp-menu-item>
        <sp-menu-item>
            Select and mask...
        </sp-menu-item>
        <sp-menu-divider></sp-menu-divider>
        <sp-menu-item>
            Save selection
        </sp-menu-item>
        <sp-menu-item disabled>
            Make work path
        </sp-menu-item>
    </sp-menu>
</sp-dropdown>

Disabled

<p><strong>Standard:</strong></p>
<sp-dropdown
    label="Select a Country with a very long label, too long in fact"
    disabled
>
    <sp-menu>
        <sp-menu-item>
            Deselect
        </sp-menu-item>
        <sp-menu-item>
            Select inverse
        </sp-menu-item>
        <sp-menu-item>
            Feather...
        </sp-menu-item>
        <sp-menu-item>
            Select and mask...
        </sp-menu-item>
        <sp-menu-divider></sp-menu-divider>
        <sp-menu-item>
            Save selection
        </sp-menu-item>
        <sp-menu-item disabled>
            Make work path
        </sp-menu-item>
    </sp-menu>
</sp-dropdown>
<br />
<br />
<p><strong>Quiet:</strong></p>
<sp-dropdown
    label="Select a Country with a very long label, too long in fact"
    disabled
    quiet
>
    <sp-menu>
        <sp-menu-item>
            Deselect
        </sp-menu-item>
        <sp-menu-item>
            Select inverse
        </sp-menu-item>
        <sp-menu-item>
            Feather...
        </sp-menu-item>
        <sp-menu-item>
            Select and mask...
        </sp-menu-item>
        <sp-menu-divider></sp-menu-divider>
        <sp-menu-item>
            Save selection
        </sp-menu-item>
        <sp-menu-item disabled>
            Make work path
        </sp-menu-item>
    </sp-menu>
</sp-dropdown>

Accessibility

An <sp-dropdown> parent will ensure that the wrapped <sp-menu> features a role of listbox and contains children with the role option. Upon focusing the <sp-dropdown> using ArrowDown will also open the menu while throwing focus into first selected (or unselected when none are selected) menu item to assist in selecting of a new value.

Usage no npm install needed!