<message-box/>

<message-box/> is a Web component implemented on Lit-Element library. It is similar to native HTML Element and could runs in mainstream browsers without any difference.

In short, it is a message string box and some buttons, common application scenario is to convey to the website user some information. For example:

<message-box class="colorful" >
  <span slot="message">
    This is an example that contains only one option.
  </span>
  <button slot="button">Okay</button>
</message-box>

It looks like this:

Another common scenario is the progress bar. Message-box has a progress bar via gradient background color:

More examples can be found here.

Usage

Import directly in HTML

npm CDNs like unpkg.com can directly serve files that have been published to npm. This works great for standard JavaScript modules that the browser can load natively.

So recommended ways of importing:

<!-- Importing -->
<script type="module">
  import 'https://unpkg.com/@lit-component/message-box?module';
  ...
</script>
<!-- Using -->
<message-box .../>

Or:

<!-- Importing -->
<script type="module" src="https://unpkg.com/@lit-component/message-box?module"></script>
<!-- Using -->
<message-box .../>

Import in project using Npm & Webpack

1. Installation via NPM

npm i @lit-component/message-box

2. Importing

In webpack entry script, usually, index.js:

import '@lit-component/message-box'

In HTML:

<message-box .../>

Create <message-box/> with generator

generator is using for generates a <message-box/> quickly:

import { generator } from '@lit-component/message-box'

const mountPoint = document.body

const $messageBox = generator(
  `
    <span slot="message">
      This is an example that contains only one option.
    </span>
    <button slot="button">Okay</button>
  `,
  { out: 'right' },
  {
    position: 'fixed',
    top: '2vh',
    'z-index': 'max',
  },
  mountPoint
)

mountPoint.appendChild($messageBox)

Attribute & Properties

You can set attributes for <message-box/> elements directly or properties for Web Component MessageBox instances, and they have the same effect:

<message-box min-width="20vw"/>

<!-- Is equal to -->

<message-box/>
<script>
  const $messageBox = document.querySelector('message-box')
  $messageBox.minWidth = '20vw'
</script>

Slots

CSS Shadow Parts