Bookmarklet to prevent sites from messing with the copy/paste events. Executing it a second time restore the sites normal behavior

bookmarlet.js

(function () {
    function showModal(message) {
        const main = document.createElement('div');
        main.style.position = 'fixed';
        main.style.top = '16px';
        main.style.width = '80vw';
        main.style.left = '50%';
        main.style.transform = 'translateX(-50%)';
        main.style.maxWidth = '800px';
        main.style.backgroundColor = 'rgba(255, 218, 121,0.8)';
        main.style.border = '2px solid #000';
        main.style.borderRadius = '4px';
        main.style.padding = '8px';
        main.style.zIndex = '9999999';
        main.style.textAlign = 'center';
        main.style.color = '#000';
        main.style.fontFamily = 'sans-serif';

        main.innerText = message;

        const timeout = setTimeout(() => {
            main.remove();
        }, 2000);

        main.addEventListener('click', () => {
            main.remove();
            clearTimeout(timeout);
        });
        document.body.appendChild(main);
    }

    if (window.__cl4PreventPropagation) {
        document.removeEventListener('paste', window.__cl4PreventPropagation, true);
        document.removeEventListener('copy', window.__cl4PreventPropagation, true);
        delete window.__cl4PreventPropagation;
        showModal('Page specific copy and paste behavior has been restored.');
    } else {
        window.__cl4PreventPropagation = function(e) {
            e.stopImmediatePropagation();
        };
        document.addEventListener('paste', window.__cl4PreventPropagation, true);
        document.addEventListener('copy', window.__cl4PreventPropagation, true);
        showModal('The page no longer will interfere with your copy and paste actions.');
    }
})()

bookmarlet.url

javascript:(function(){function showModal(message){const main=document.createElement('div');main.style.position='fixed';main.style.top='16px';main.style.width='80vw';main.style.left='50%';main.style.transform='translateX(-50%)';main.style.maxWidth='800px';main.style.backgroundColor='rgba(255, 218, 121,0.8)';main.style.border='2px solid #000';main.style.borderRadius='4px';main.style.padding='8px';main.style.zIndex='9999999';main.style.textAlign='center';main.style.color='#000';main.style.fontFamily='sans-serif';main.innerText=message;const timeout=setTimeout(()=>{main.remove();},2000);main.addEventListener('click',()=>{main.remove();clearTimeout(timeout);});document.body.appendChild(main);}if(window.__cl4PreventPropagation){document.removeEventListener('paste',window.__cl4PreventPropagation,true);document.removeEventListener('copy',window.__cl4PreventPropagation,true);delete window.__cl4PreventPropagation;showModal('Page specific copy and paste behavior has been restored.');}else{window.__cl4PreventPropagation=function(e){e.stopImmediatePropagation();};document.addEventListener('paste',window.__cl4PreventPropagation,true);document.addEventListener('copy',window.__cl4PreventPropagation,true);showModal('The page no longer will interfere with your copy and paste actions.');}})();