Close menu when user clicks on div

How can I check if a user is clicking on a div called right-side-container and if they are remove the class of menu-opened.

    toggleMenu() {
      this.open = !this.open;
      document.getElementsByTagName("html")[0].classList.toggle("menu-opened");
      if (this.open) {
        document.addEventListener("click", this.menuClickListener);
      } else {
        document.removeEventListener("click", this.menuClickListener);
      }
    },
    menuClickListener($event) {
      console.log($event);
    },
  },
}; 


// This is what I want to remove when the user is clicking the right-side-container
document.getElementsByTagName("html")[0].classList.remove("menu-opened");