pinafore/src/routes/_components/dialog/components/EmojiDialog.html

<ModalDialog
  {id}
  {label}
  {title}
  background="var(--main-bg)"
>
  <div class="emoji-container" {style} >
    {#if loaded}
      <emoji-mart props-json={emojiMartPropsJson} ></emoji-mart>
    {:elseif error}
      <div>Failed to load emoji picker: {error}</div>
    {:else}
      <div class="emoji-container-loading" >
        <LoadingSpinner />
      </div>
    {/if}
  </div>
</ModalDialog>
<style>
  .emoji-container {
    max-width: calc(100vw - 20px);
    position: relative;
  }
  .emoji-container-loading {
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  :global(.emoji-mart-category .emoji-mart-emoji-custom span,
    .emoji-mart-preview-emoji .emoji-mart-emoji-custom span) {
    /* some custom emoji look repeated because they aren't tall enough */
    background-repeat: no-repeat;
    background-position: center center;
  }
</style>
<script>
  import ModalDialog from './ModalDialog.html'
  import { store } from '../../../_store/store'
  import { insertEmoji } from '../../../_actions/emoji'
  import { show } from '../helpers/showDialog'
  import { close } from '../helpers/closeDialog'
  import { oncreate as onCreateDialog } from '../helpers/onCreateDialog'
  import { define } from 'remount/es6'
  import { loadCSS } from '../../../_utils/loadCSS'
  import LoadingSpinner from '../../../_components/LoadingSpinner.html'
  import { importEmojiMart } from '../../../_utils/asyncModules'
  import { on } from '../../../_utils/eventBus'

  export default {
    async oncreate () {
      onCreateDialog.call(this)
      on('emoji-selected', this, emoji => this.onEmojiSelected(emoji))
      try {
        loadCSS('/emoji-mart.css')
        let Picker = await importEmojiMart()
        if (!customElements.get('emoji-mart')) {
          define({ 'emoji-mart': Picker })
        }
        this.set({ loaded: true })
      } catch (error) {
        this.set({ error }) // should never happen, but you never know
      }
    },
    components: {
      ModalDialog,
      LoadingSpinner
    },
    store: () => store,
    data: () => ({
      loading: true,
      loaded: false,
      error: void 0
    }),
    computed: {
      // try to estimate size of emoji-mart based on mobile vs desktop
      style: ({ $isSmallMobileSize }) => (`
        min-width: ${$isSmallMobileSize ? 250 : 300}px;
        min-height: ${$isSmallMobileSize ? 300 : 400}px;
      `),
      emojiMartPropsJson: ({ emojiMartProps }) => JSON.stringify(emojiMartProps),
      emojiMartProps: ({ perLine, custom, showPreview }) => ({
        perLine,
        custom,
        showPreview,
        color: 'var(--nav-bg)',
        emoji: 'sailboat',
        title: 'Emoji'
      }),
      showPreview: ({ $isSmallMobileSize }) => !$isSmallMobileSize,
      perLine: ({ $isSmallMobileSize }) => $isSmallMobileSize ? 7 : 9,
      custom: ({ $currentCustomEmoji, $autoplayGifs }) => {
        if (!$currentCustomEmoji) {
          return []
        }
        return $currentCustomEmoji.filter(emoji => emoji.visible_in_picker).map(emoji => ({
          name: emoji.shortcode,
          short_names: [emoji.shortcode],
          text: `:${emoji.shortcode}:`,
          emoticons: [],
          keywords: [emoji.shortcode],
          imageUrl: $autoplayGifs ? emoji.url : emoji.static_url
        }))
      }
    },
    methods: {
      show,
      close,
      onEmojiSelected (emoji) {
        let { realm } = this.get()
        insertEmoji(realm, emoji)
        this.close()
      }
    }
  }
</script>