There are available several custom events:
While opening a popup window
document.addEventListener( 'snitcher-open' , ( e ) => {
console.log( e.detail );
}, false);
While closing a popup window
document.addEventListener( 'snitcher-close' , ( e ) => {
console.log( e.detail );
}, false);
Below is an example of snitcher-open
/snitcher-close
closeBtn: "top-right"
closeKey: "on"
closePlace: "modal"
content: ""
fullscreen: "off"
id: "mdp-snitch-19"
inactivityTimer: "0"
openTimer: "0.4"
overlay: "off"
position: "top-center"
scrollDirection: "down"
scrolled: "1"
scrolledUnit: "px"
selector: ".wp-block-button__link"
showAfter: "0"
tabStatus: "visible"
trigger: "click"