mercury_editor-2.0.x-dev/build/js/node-form.min.js

!function(){"use strict";((e,t)=>{e.behaviors.mercuryEditorNodeForm={attach:function(e,n){t("me-entity-form",".me-entity-form",e)&&(document.querySelector("form.me-entity-form").addEventListener("change",(e=>{e.target.closest("form").classList.add("unsaved-changes")})),window.addEventListener("beforeunload",(e=>{document.querySelector(".me-entity-form.unsaved-changes")&&(e.preventDefault(),e.returnValue="")})))}}})(Drupal,once)}();