How to close navigation by clicking on the outside and refactoring Js?

Hi Im trying to build my own navigation with just pure HTML, CSS, Js. I pretty much got it working but my Js is not good and think it could be cleaner. The functionality I want is…

when you click a dropdown if there is another dropdown open it will close it. If you click outside the dropdown it will close it. I have achieved this but I think it could be cleaner. Also for the mobile nav I would like it to close when you click outside of the navigation which I have not achieved. Here is the github repository https://github.com/danbakerri/bulma-test and the actual site https://danbakerri.github.io/bulma-test/ to see it in action the script is at the bottom of the index page(using the Bulma framework for now)

this is the HTML for the dropdowns

  <div class="navbar-item has-dropdown" data-dropdown>
            <a
              class="navbar-link navbar-dropdown-link"
              aria-label="menu"
              aria-expanded="false"
            >
              More
            </a>

            <div class="navbar-dropdown">
              <a class="navbar-item"> About </a>
              <a class="navbar-item is-selected"> Jobs </a>
              <a class="navbar-item"> Contact </a>
              <hr class="navbar-divider" />
              <a class="navbar-item"> Report an issue </a>
            </div>
          </div>

and this is the js (it works the way I want it to but I think it could be cleaner any Ideas?)

  window.addEventListener("load", function () {
        // wait until the page loads before working with HTML elements
        document.addEventListener("click", function (event) {
          //click listener on the document
          document.querySelectorAll(".navbar-dropdown").forEach(function (el) {
            if (el !== event.target) el.classList.remove("is-active");
            // close any showing dropdown that isn't the one just clicked
          });
          document
            .querySelectorAll(".navbar-dropdown-link")
            .forEach(function (el) {
              if (el !== event.target) el.classList.remove("is-active");
              // close any showing dropdown that isn't the one just clicked
            });
          if (event.target.matches(".navbar-dropdown-link")) {
            event.target
              .closest(".has-dropdown")
              .querySelector(".navbar-dropdown")
              .classList.toggle("is-active");
          }
          if (
            event.target.matches(".navbar-dropdown-link") &&
            event.target.matches(".is-active")
          ) {
            event.target
              .closest(".has-dropdown")
              .querySelector(".navbar-dropdown")
              .classList.remove("is-active");
          }
          if (event.target.matches(".navbar-dropdown-link")) {
            event.target
              .closest(".has-dropdown")
              .querySelector(".navbar-dropdown-link")
              .classList.toggle("is-active");
          }
          // if this is a dropdown button being clicked, toggle the show class
        });
      });

and to open and close the nav in mobile I have the button

 <a
          role="button"
          class="navbar-burger"
          aria-label="menu"
          aria-expanded="false"
          data-target="navbarBasicExample"
        >
          <span aria-hidden="true"></span>
          <span aria-hidden="true"></span>
          <span aria-hidden="true"></span>
          <span aria-hidden="true"></span>
        </a>
      </div>
<div id="navbarBasicExample" class="navbar-menu">
<!--body of nav-->
</div>

and Js. I would like to edit this script so it closes when you click anywhere out side of the nav <div id="navbarBasicExample" class="navbar-menu"> any ideas? here is the script I have (taken from the bulma site

  document.addEventListener("DOMContentLoaded", () => {
        // Get all "navbar-burger" elements
        const $navbarBurgers = Array.prototype.slice.call(
          document.querySelectorAll(".navbar-burger"),
          0
        );

        // Add a click event on each of them
        $navbarBurgers.forEach((el) => {
          el.addEventListener("click", () => {
            // Get the target from the "data-target" attribute
            const target = el.dataset.target;
            const $target = document.getElementById(target);

            // Toggle the "is-active" class on both the "navbar-burger" and the "navbar-menu"

            el.classList.toggle("is-active");
            $target.classList.toggle("is-active");
          });
        });
      });

Any suggestions on how I could simplify my script and get the functionality of the nav closing when I click out of it would be greatly appreciated thanks!