https://www.mapcon.com/js/tinymce-dialog-v3.js?v=4

1window.mapconTinyMce = window.mapconTinyMce || {
2    init: function (elementId, containerId, initialContent, height) {
3        if (!window.tinymce) {
4            throw new Error("TinyMCE script is not loaded.");
5        }
6
7        if (!window._mapconTinyMceFocusPatchInstalled) {
8            document.addEventListener('focusin', function (e) {
9                var target = e.target;
10                if (target && target.closest && target.closest('.tox-tinymce-aux, .tox-dialog, .tox-menu, .tox-collection')) {
11                    e.stopImmediatePropagation();
12                }
13            }, true);
14
15            window._mapconTinyMceFocusPatchInstalled = true;
16        }
17
18        var existing = window.tinymce.get(elementId);
19        if (existing) {
20            existing.remove();
21        }
22
23        var target = document.getElementById(elementId);
24        if (!target) {
25            throw new Error("TinyMCE target element '" + elementId + "' was not found.");
26        }
27
28        var mudDialogContent = target.closest('.mud-dialog-content');
29        if (mudDialogContent) {
30            mudDialogContent.style.overflow = 'visible';
31        }
32
33        var mudDialog = target.closest('.mud-dialog');
34        if (mudDialog) {
35            mudDialog.style.overflow = 'visible';
36        }
37
38        var mudPaper = target.closest('.mud-paper');
39        if (mudPaper) {
40            mudPaper.style.overflow = 'visible';
41        }
42
43        return window.tinymce.init({
44            target: target,
45            base_url: "/lib/tinymce",
46            suffix: ".min",
47            promotion: false,
48            branding: false,
49            menubar: false,
50            license_key: "gpl",
51            height: height || 520,
52            zindex: 100000,
53            plugins: "lists link image table code fullscreen preview",
54            toolbar: "undo redo | blocks | bold italic underline | bullist numlist | link image table | code fullscreen preview",
55            content_style: "body { font-family:Roboto,Arial,sans-serif; font-size:14px }",
56            setup: function (editor) {
57                editor.on("init", function () {
58                    editor.setContent(initialContent || "");
59                });
60            }
61        });
62    },
63
64    getContent: function (elementId) {
65        var editor = window.tinymce ? window.tinymce.get(elementId) : null;
66        return editor ? editor.getContent() : "";
67    },
68
69    setContent: function (elementId, content) {
70        var editor = window.tinymce ? window.tinymce.get(elementId) : null;
71        if (editor) {
72            editor.setContent(content || "");
73        }
74    },
75
76    dispose: function (elementId) {
77        var editor = window.tinymce ? window.tinymce.get(elementId) : null;
78        if (editor) {
79            editor.remove();
80        }
81    }
82};