@polymer/paper-item v3.0.1
<paper-item>
<paper-item> is an interactive list item. By default, it is a horizontal flexbox.
<paper-item>Item</paper-item>Use this element with <paper-item-body> to make Material Design styled two-line and three-line
items.
<paper-item>
<paper-item-body two-line>
<div>Show your status</div>
<div secondary>Your status is visible to everyone</div>
</paper-item-body>
<iron-icon icon="warning"></iron-icon>
</paper-item>To use paper-item as a link, wrap it in an anchor tag. Since paper-item will
already receive focus, you may want to prevent the anchor tag from receiving
focus as well by setting its tabindex to -1.
<a href="https://www.polymer-project.org/" tabindex="-1">
<paper-item raised>Polymer Project</paper-item>
</a>If you are concerned about performance and want to use paper-item in a paper-listbox
with many items, you can just use a native button with the paper-item class
applied (provided you have correctly included the shared styles):
<style is="custom-style" include="paper-item-shared-styles"></style>
<paper-listbox>
<button class="paper-item" role="option">Inbox</button>
<button class="paper-item" role="option">Starred</button>
<button class="paper-item" role="option">Sent mail</button>
</paper-listbox>Styling
The following custom properties and mixins are available for styling:
| Custom property | Description | Default |
|---|---|---|
--paper-item-min-height | Minimum height of the item | 48px |
--paper-item | Mixin applied to the item | {} |
--paper-item-selected-weight | The font weight of a selected item | bold |
--paper-item-selected | Mixin applied to selected paper-items | {} |
--paper-item-disabled-color | The color for disabled paper-items | --disabled-text-color |
--paper-item-disabled | Mixin applied to disabled paper-items | {} |
--paper-item-focused | Mixin applied to focused paper-items | {} |
--paper-item-focused-before | Mixin applied to :before focused paper-items | {} |
Accessibility
This element has role="listitem" by default. Depending on usage, it may be more appropriate to set
role="menuitem", role="menuitemcheckbox" or role="menuitemradio".
<paper-item role="menuitemcheckbox">
<paper-item-body>
Show your status
</paper-item-body>
<paper-checkbox></paper-checkbox>
</paper-item><paper-icon-item>
<paper-icon-item> is a convenience element to make an item with icon. It is an interactive list
item with a fixed-width icon area, according to Material Design. This is useful if the icons are of
varying widths, but you want the item bodies to line up. Use this like a <paper-item>. The child
node with the slot item-icon is placed in the icon area.
<paper-icon-item>
<iron-icon icon="favorite" slot="item-icon"></iron-icon>
Favorite
</paper-icon-item>
<paper-icon-item>
<div class="avatar" slot="item-icon"></div>
Avatar
</paper-icon-item>Styling
The following custom properties and mixins are available for styling:
| Custom property | Description | Default |
|---|---|---|
--paper-item-icon-width | Width of the icon area | 56px |
--paper-item-icon | Mixin applied to the icon area | {} |
--paper-icon-item | Mixin applied to the item | {} |
--paper-item-selected-weight | The font weight of a selected item | bold |
--paper-item-selected | Mixin applied to selected paper-items | {} |
--paper-item-disabled-color | The color for disabled paper-items | --disabled-text-color |
--paper-item-disabled | Mixin applied to disabled paper-items | {} |
--paper-item-focused | Mixin applied to focused paper-items | {} |
--paper-item-focused-before | Mixin applied to :before focused paper-items | {} |
Changes in 2.0
Distribution is now done with the slot="item-icon" attributes (replacing the item-icon attribute):
<paper-icon-item>
<iron-icon icon="favorite" slot="item-icon"></iron-icon>
Favorite
</paper-icon-item><paper-item-body>
Use <paper-item-body> in a <paper-item> or <paper-icon-item> to make two- or
three- line items. It is a flex item that is a vertical flexbox.
<paper-item>
<paper-item-body two-line>
<div>Show your status</div>
<div secondary>Your status is visible to everyone</div>
</paper-item-body>
</paper-item>The child elements with the secondary attribute is given secondary text styling.
Styling
The following custom properties and mixins are available for styling:
| Custom property | Description | Default |
|---|---|---|
--paper-item-body-two-line-min-height | Minimum height of a two-line item | 72px |
--paper-item-body-three-line-min-height | Minimum height of a three-line item | 88px |
--paper-item-body-secondary-color | Foreground color for the secondary area | --secondary-text-color |
--paper-item-body-secondary | Mixin applied to the secondary area | {} |
See: Documentation, Demo.
Usage
Installation
npm install --save @polymer/paper-itemIn an html file
<html>
<head>
<script type="module">
import '@polymer/paper-item/paper-item.js';
</script>
</head>
<body>
<paper-item>Item</paper-item>
</body>
</html>In a Polymer 3 element
import {PolymerElement, html} from '@polymer/polymer';
import '@polymer/paper-item/paper-item.js';
class SampleElement extends PolymerElement {
static get template() {
return html`
<paper-item>Item</paper-item>
`;
}
}
customElements.define('sample-element', SampleElement);Contributing
If you want to send a PR to this element, here are the instructions for running the tests and demo locally:
Installation
git clone https://github.com/PolymerElements/paper-item
cd paper-item
npm install
npm install -g polymer-cliRunning the demo locally
polymer serve --npm
open http://127.0.0.1:<port>/demo/Running the tests
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