function nick(nickname, targetSelector) { let target = document.querySelector(targetSelector); if (!target) return; target.setRangeText( `**${nickname}**, `, target.selectionStart, target.selectionEnd, "end" ); target.focus(); } function toggle(event, targetSelector, toggleClass) { let element = event.target; element.parentElement.querySelector(targetSelector).classList.toggle(toggleClass); }