https://vb.rebelbetting.com/_content/GoogleCaptchaComponent/Scripts/ScriptLoader.js

1// loadScript: returns a promise that completes when the script loads
2// this is part of GoogleCaptchaComponent (/extras) but is also used by webapp
3window.loadScript = function (scriptPath, id) {
4
5    // check list - if already loaded we can ignore
6    if (loaded[scriptPath]) {
7        console.log(scriptPath + " already loaded");
8        // return 'empty' promise
9        return new this.Promise(function (resolve, reject) {
10            resolve();
11        });
12    }
13
14    return new Promise(function (resolve, reject) {
15        // create JS library script element
16        var script = document.createElement("script");
17
18        if (scriptPath === "https://www.google.com/recaptcha/api.js") {
19            script.src = scriptPath + "?render=explicit";
20        }
21
22		if (id)
23			script.id = id;
24
25        script.async = true;
26        script.defer = true;
27
28        script.src = scriptPath;
29        script.type = "text/javascript";
30
31       // console.log(scriptPath + " created");
32
33        // flag as loading/loaded
34        loaded[scriptPath] = true;
35
36        // if the script returns okay, return resolve
37        script.onload = function () {
38           // console.log(scriptPath + " loaded ok");
39            resolve(scriptPath);
40        };
41
42        // if it fails, return reject
43        script.onerror = function () {
44          //  console.log(scriptPath + " load failed");
45            reject(scriptPath);
46        }
47
48        // scripts will load at end of body
49		document["body"].appendChild(script);
50
51		console.log(scriptPath + " loaded");
52
53    });
54}
55// store list of what scripts we've loaded
56loaded = [];