next-ucap-messenger/projects/ucap-webmessenger-ui-chat/src/lib/components/message-box/sticker.component.html

<div class="bubble-main">
  <ul>
    <li *ngIf="stickerUrl">
      <img
        [src]="stickerUrl"
        onerror="this.src='assets/sticker/sticker_default.png'"
      />
    </li>
    <li
      *ngIf="contentJson && contentJson.chat"
      [innerHTML]="contentJson.chat | linefeedtohtml"
    ></li>
  </ul>
</div>