shareon/src/shareon.js

// eslint-disable-next-line import/no-unresolved
import urlBuilderMap from "consts:urlBuilderMap";

const initializeShareon = () => {
  const shareonContainers = document.getElementsByClassName("shareon");

  // iterate over <div class="shareon">
  for (let i = 0; i < shareonContainers.length; i += 1) {
    /** @type Element */
    const container = shareonContainers[i];

    // iterate over children of <div class="shareon">
    for (let j = 0; j < container.children.length; j += 1) {
      /** @type Element */
      const child = container.children[j];

      if (child) {
        const classListLength = child.classList.length;

        // iterate over classes of the child element
        for (let k = 0; k < classListLength; k += 1) {
          const cls = child.classList.item(k);

          // if it's one of the networks
          if (Object.prototype.hasOwnProperty.call(urlBuilderMap, cls)) {
            const preset = {
              url: encodeURIComponent(
                child.dataset.url ||
                  container.dataset.url ||
                  window.location.href
              ),
              title: encodeURIComponent(
                child.dataset.title || container.dataset.title || document.title
              ),
              media: encodeURIComponent(
                child.dataset.media || container.dataset.media || ""
              ),
              text: encodeURIComponent(
                child.dataset.text || container.dataset.text || ""
              ),
              via: encodeURIComponent(
                child.dataset.via || container.dataset.via || ""
              ),
              fbAppId: encodeURIComponent(
                child.dataset.fbAppId || container.dataset.fbAppId || ""
              ),
            };
            const url = urlBuilderMap[cls](preset);

            if (child.tagName.toLowerCase() === "a") {
              child.setAttribute("href", url);
              child.setAttribute("rel", "noopener noreferrer");
              child.setAttribute("target", "_blank");
            } else {
              const getButtonListener = (buttonUrl) => () => {
                window.open(buttonUrl, "_blank", "noopener,noreferrer");
              };

              child.addEventListener("click", getButtonListener(url));
            }

            break; // once a network is detected we don't want to check further
          }
        }
      }
    }
  }
};

export default initializeShareon;