georapbox/skeleton-placeholder-element

A custom element that acts as a placeholder to indicate that some content will eventually be rendered.

<skeleton-placeholder>

A custom element that acts as a placeholder to indicate that some content will eventually be rendered.

API documentation • Demo

Install

npm install --save @georapbox/skeleton-placeholder-element

Usage

Script

import { SkeletonPlaceholder } from './node_modules/@georapbox/skeleton-placeholder-element/dist/skeleton-placeholder.js';

// Manually define the element.
SkeletonPlaceholder.defineCustomElement();

Alternatively, you can import the automatically defined custom element.

import './node_modules/@georapbox/skeleton-placeholder-element/dist/skeleton-placeholder-defined.js';

Markup

<skeleton-placeholder effect="wave" variant="pill"></skeleton-placeholder>

Style

By default, the component is style-free to remain as less opinionated as possible. However, you can style the various elements of the component using CSS Parts and CSS Custom Properties provided for this purpose.

API

Properties

Name	Reflects	Type	Required	Default	Description
effect	✓	'none' | 'wave' | 'fade'	-	'none'	The animation effect the skeleton element will use.
variant	✓	'circle' | 'rect' | 'pill'	-	""	The skeleton's variations. This is just a set of predefined border-radius values. For more flexibility, you can use the --border-radius custom CSS property.

Slots

Name	Description
(default)	It can be used in the rare scenario that you might need to render something inside the placeholder element, such as an image, etc. Check the slot example demo.

CSS Parts

Name	Description
wrapper	The skeleton's internal wrapper element.
placeholder	The skeleton's placeholder element.

CSS Custom Properties

Name	Description
--border-radius	The border radius of the placeholder element.
--color	The color of the placeholder element.
--wave-color	The color of the wave effect.

Methods

Name	Type	Description	Arguments
defineCustomElement	Static	Defines/registers the custom element with the name provided. If no name is provided, the default name is used. The method checks if the element is already defined, hence will skip trying to redefine it.	elementName='skeleton-placeholder'

Changelog

For API updates and breaking changes, check the CHANGELOG.

Development setup

Prerequisites

The project requires Node.js and npm to be installed on your environment. Preferrably, use nvm Node Version Manager and use the version of Node.js specified in the .nvmrc file by running nvm use.

Install dependencies

Install the project dependencies by running the following command.

npm install

Build for development

Watch for changes and start a development server by running the following command.

npm start

Linting

Lint the code by running the following command.

npm run lint

Testing

Run the tests by running any of the following commands.

npm test
npm run test:watch # watch mode

Build for production

Create a production build by running the following command.

npm run build

License

The MIT License (MIT)