body.html

<script>
  function oidcRedirect() {
    const qs = new URLSearchParams(window.location.search.substring(1));
    qs.delete("oidc");

    const path = encodeURIComponent(
      window.location.pathname.replace(/\/+/g, "/"),
    );
    const search = encodeURIComponent(qs.toString());

    let hash = "config.prejoinConfig.enabled=false";
    if (window.location.hash) {
      hash = `${hash}&${window.location.hash.substring(1)}`;
    }
    hash = encodeURIComponent(hash);

    window.location = `/oidc/auth?path=${path}&search=${search}&hash=${hash}`;

    try {
      // remove react from DOM to prevent UI distortion
      document.all.react.remove();
    } catch {
      // do nothing
    }
  }

  function interceptLoginRequest() {
    try {
      // check if login or IamHost button is created in DOM
      const _button = document.getElementById("modal-dialog-ok-button");
      if (!_button) return;

      let labelKey;
      try {
        labelKey = Object.values(_button)[0].return.memoizedProps.labelKey;
      } catch {
        // do nothing
      }

      if (labelKey === "dialog.login") {
        // if this is a login screen, redirect to OIDC login page
        oidcRedirect();
      } else if (labelKey === "dialog.IamHost") {
        // if this is an IamHost screen, redirect to OIDC login page when clicked
        _button.onclick = oidcRedirect;
      }
    } finally {
      setTimeout(function () {
        interceptLoginRequest();
      }, 1000);
    }
  }

  interceptLoginRequest();
</script>