https://www.dumpsterdaddyny.com/cp/resources/views/test_slot/slot/plugins/CaptureShot.js

1export default function CaptureShot(classDef) {
2    return function(opts) {
3        classDef.call(this, opts);
4        this.resolver = () => {};
5
6        this.answer = async (...values) => {
7            // answer just resolves the promise returned by show
8            this.resolver(values);
9        };
10
11        this.capture = async (comp, opts) => {
12            const result = await Promise.all([
13                (async () => {
14                    if (comp) await this.show(comp, opts);
15                })(),
16                new Promise(resolve => {
17                    this.resolver = resolve;
18                })
19            ]);
20            return result[1];
21        }
22    };
23}