discourse/plugins/lazy-yt/assets/javascripts/initializers/lazyYT.js

import { withPluginApi } from "discourse/lib/plugin-api";
import initLazyYt from "../lib/lazyYT";

export default {
  name: "apply-lazyYT",
  initialize() {
    withPluginApi("0.1", (api) => {
      initLazyYt($);
      api.decorateCooked(
        ($elem) => {
          const iframes = $(".lazyYT", $elem);
          if (iframes.length === 0) {
            return;
          }

          $(".lazyYT", $elem).lazyYT({
            onPlay(e, $el) {
              // don't cloak posts that have playing videos in them
              const postId = parseInt(
                $el.closest("article").data("post-id"),
                10
              );
              if (postId) {
                api.preventCloak(postId);
              }
            },
          });
        },
        { id: "discourse-lazyyt" }
      );
    });
  },
};