sp-menu

NPM 1.5.0

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Overview API Changelog

Overview

An <sp-menu> is used for creating a menu list. The various elements inside a menu are given as <sp-menu-group>, <sp-menu-item>, or <sp-menu-divider>. Often a <sp-menu> element will appear in a <sp-popover> element so that it displays as a toggling menu.

Usage

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yarn add @spectrum-web-components/menu

Import the side effectful registration of <sp-menu>, <sp-menu-group>, <sp-menu-item>, or <sp-menu-divider> individually as follows:

import '@spectrum-web-components/menu/sp-menu.js';
import '@spectrum-web-components/menu/sp-menu-group.js';
import '@spectrum-web-components/menu/sp-menu-item.js';
import '@spectrum-web-components/menu/sp-menu-divider.js';

When looking to leverage the Menu, MenuGroup, MenuItem, or MenuDivider base classes as a type and/or for extension purposes, do so via:

import {
    Menu,
    MenuGroup,
    MenuItem,
    MenuDivider
} from '@spectrum-web-components/menu';

Anatomy

<sp-menu label="Selection type">
    <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-item>
        Save selection
    </sp-menu-item>
    <sp-menu-item disabled>
        Make work path
    </sp-menu-item>
</sp-menu>

Popover menus

Often an <sp-menu> element will be delivered inside of an <sp-popover> element when displaying it above other content.

<sp-popover open style="position: relative" label="Selection type">
    <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-item value="item-5">Save selection</sp-menu-item>
        <sp-menu-item value="item-6" disabled>Make work path</sp-menu-item>
    </sp-menu>
</sp-popover>

Labels

To render accessibly, an <sp-menu> element or its parent <sp-popover> must have a label. For an accessible label that is visibly hidden, but can still be read by assistive technology, use the label attribute.

Menu with label 
<sp-menu id="menu-label-attribute" label="Selection type">
    <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>
 Popover with label

Options

Sizes

Small Medium 
<sp-menu id="menu-m" size="m" label="Selection type">
    <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-popover open style="position: relative" label="Selection type:">
    <sp-menu id="menu-m-popover" size="m">
        <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-popover>
 Large Extra Large

Selection

The <sp-menu> element can be instructed to maintain a selection via the selects attribute. Depending on the chosen algorithm, the <sp-menu> element will hold a value property and manage the selected state of its <sp-menu-item> descendants.

  • When selects="single", the <sp-menu> element will maintain one selected item after an initial selection is made.
  • When selects is set to multiple, the <sp-menu> element will maintain zero or more selected items.
  • When selects is set to inherit, the <sp-menu> element will allow its <sp-menu-item> children to participate in the selection of its nearest <sp-menu> ancestor.
Single 
<p>
    The value of the `&lt;sp-menu&gt;` element is:
    <span id="single-value"></span>
</p>
<sp-menu
    label="Choose a shape"
    selects="single"
    onchange="this.previousElementSibling.querySelector('#single-value').textContent=this.value"
>
    <sp-menu-item value="item-1">Square</sp-menu-item>
    <sp-menu-item value="item-2" selected>Triangle</sp-menu-item>
    <sp-menu-item value="item-3">Parallelogram</sp-menu-item>
    <sp-menu-item value="item-4">Star</sp-menu-item>
    <sp-menu-item value="item-5">Hexagon</sp-menu-item>
    <sp-menu-item value="item-6" disabled>Circle</sp-menu-item>
</sp-menu>
 Multiple Inherit

Behaviors

"change" event

Regardless of whether or not <sp-menu> carries a selection, when one of the <sp-menu-item> children that it manages is activated, the <sp-menu> element will dispatch a change event. At dispatch time, even when a selection is not held due to the absence of the selects attribute, the value of the <sp-menu> will correspond to the <sp-menu-item> that was activated. When the selects attribute is present, this value will persist beyond the lifecycle of the change event. When selects="multiple", the values of multiple items will be comma separated, unless otherwise set via the value-separator attribute.

Note: The change event is only dispatched on a left mouse click or Enter/Space keypress. Right/Middle mouse clicks will not dispatch the change event.

Accessibility

Review the accessibility guidelines for the menu-item and menu-group descendants.

Include a label

A menu is required to have an accessible label.