https://bambinabambino.net/wp-content/themes/hanjo-one/js/edit-listener.js?ver=6.1.0

1jQuery(function ($) {
2    window.onmouseover = function (e) {
3        if (editSource) {
4            editSource.postMessage(e.target.id, editOrigin);
5        }
6    };
7
8    var editOrigin;
9    var editSource;
10
11    window.addEventListener('message', function (event) {
12        switch (event.data.method) {
13            case "test":
14                console.log(event.origin + event.data.method);
15                const scroll = $(window).scrollTop();
16
17                editSource = event.source;
18                editOrigin = event.origin;
19
20                event.source.postMessage(scroll, event.origin);
21                $('#top-image').height('100px');
22
23                break;
24        }
25    }, false);
26});