Bento Lightbox
Usage
The Bento Lightbox component displays elements in a full-viewport "lightbox" modal. It can be used as a web component <bento-lightbox>, or as a Preact/React functional component <BentoLightbox>.
Web Component
You must include each Bento component's required CSS library before adding custom styles in order to guarantee proper loading. Or use the lightweight pre-uprgrade styles available inline. See Layout and Style.
The examples below demonstrate use of the <bento-lightbox> web component.
Example: Import via npm
[example preview="top-frame" playground="false"]
Install via npm:
npm install @ampproject/bento-lightboximport '@ampproject/bento-lightbox';[/example]
Example: Import via <script>
[example preview="top-frame" playground="false"]
<head>
<script async custom-element="bento-lightbox" src="https://cdn.ampproject.org/v0/bento-lightbox-1.0.js"></script>
<style data-bento-boilerplate>
bento-lightbox {
display: none !important;
}
</style>
</head>
<bento-lightbox id="my-lightbox">
Lightboxed content
<button id="close-button">Close lightbox</button>
</bento-lightbox>
<button id="open-button">Open lightbox</button>
<script>
(async () => {
const lightbox = document.querySelector('#my-lightbox');
await customElements.whenDefined('bento-lightbox');
const api = await lightbox.getApi();
// set up button actions
document.querySelector('#open-button').onclick = () => api.open();
document.querySelector('#close-button').onclick = () => api.close();
})();
</script>[/example]
Interactivity and API usage
Bento enabled components in standalone use are highly interactive through their API.
The bento-lightbox component API is accessible by including the following script tag in your document:
await customElements.whenDefined('amp-lightbox');
const api = await lightbox.getApi();Actions
The amp-lightbox API allows you to perform the following actions:
open() Opens the lightbox.
api.open();close() Closes the lightbox.
api.close();Events
The amp-lightbox API allows you to register and respond to the following events:
open
This event is triggered when the lightbox is opened.
lightbox.addEventListener('open', (e) => console.log(e))close
This event is triggered when the lightbox is closed.
lightbox.addEventListener('close', (e) => console.log(e))Layout and style
Each Bento component has a small CSS library you must include to guarantee proper loading without content shifts. Because of order-based specificity, you must manually ensure that stylesheets are included before any custom styles.
<link rel="stylesheet" type="text/css" href="https://cdn.ampproject.org/v0/bento-lightbox-1.0.css">Alternatively, you may also make the light-weight pre-upgrade styles available inline:
<style data-bento-boilerplate>
bento-lightbox {
display: none !important;
}
</style>Attributes
id
A unique identifier for the lightbox.
hidden
Must be present when the lightbox is closed and the contents should not be displayed, such as on first layout.
animation
Defines the style of animation for opening the lightbox. By default, this will
be set to fade-in. Valid values are fade-in, fly-in-bottom, and
fly-in-top.
scrollable
When the scrollable attribute is present, the content of the lightbox can
scroll when overflowing the height of the lightbox.
Preact/React Component
The examples below demonstrates use of the <BentoLightbox> as a functional component usable with the Preact or React libraries.
Example: Import via npm
[example preview="top-frame" playground="false"]
Install via npm:
npm install @ampproject/bento-lightboximport React from 'react';
import { BentoLightbox } from '@ampproject/bento-lightbox/react';
import '@ampproject/bento-lightbox/styles.css';
function App() {
return (
<BentoLightbox
id="lightbox"
closeButtonAs={(props) => (
<button {...props} aria-label="Close my fancy lightbox">
Close!
</button>
)}
>
<p>Hello World</p>
</BentoLightbox>
);
}[/example]
Layout and style
Container type
The BentoLightbox component has a defined layout size type. To ensure the component renders correctly, be sure to apply a size to the component and its immediate children (slides) via a desired CSS layout (such as one defined with height, width, aspect-ratio, or other such properties). These can be applied inline:
<BentoLightbox style={{width: '300px', height: '200px'}}>
</BentoLightbox>Or via className:
<BentoLightbox className='custom-styles'>
</BentoLightbox>.custom-styles {
height: 100px;
width: 100%;
}Props
animation
Animation used to display the lightbox. Options are fade-in, fly-in-top or fly-in-bottom, Default is fade-in.
children
The content to show within this lightbox.
closeButtonAs
A prop which takes a function (as a render prop) to specify a custom close button.
onBeforeOpen
A prop which takes a function which is executed before the lightbox is opened.
onAfterOpen
A prop which takes a function which is executed after the lightbox is opened.
onAfterClose
A prop which takes a function which is executed after the lightbox is closed.