https://www.edison.com/static/js/srt-support-for-html5-videos.js

1(function() {
2    "use strict";
3    class i {
4        number;
5        startTime;
6        endTime;
7        text;
8        constructor(t, e, s, r) {
9            this.number = t,
10            this.startTime = e,
11            this.endTime = s,
12            this.text = r
13        }
14    }
15    function c(n) {
16        try {
17            if (!n || n === " ")
18                return !1;
19            const t = {
20                number: parseInt(n.match(/^\d+/g)[0]),
21                timing: {
22                    start: n.match(/(\d+:){2}\d+,\d+/g)[0].replace(",", "."),
23                    end: n.match(/(\d+:){2}\d+,\d+/g)[1].replace(",", ".")
24                },
25                text: n.split(/\r?\n/g).slice(2, n.split(/\r?\n/g).length).join('\n')
26            };
27            return new i(t.number,a(t.timing.start),a(t.timing.end),t.text)
28        } catch {
29            return !1
30        }
31    }
32    function a(n) {
33        let t = n.split(":")
34          , e = 0
35          , s = 1;
36        for (; t.length > 0; )
37            e += s * parseFloat(t.pop(), 10),
38            s *= 60;
39        return e
40    }
41    async function o(n, t="utf-8") {
42        return (!t || t === "") && (t = "utf-8"),
43        fetch(n).then(e => e.arrayBuffer()).then(e => new TextDecoder(t).decode(e))
44    }
45    class d {
46        src;
47        encoding;
48        lang;
49        kind;
50        label;
51        default;
52        body;
53        needsTransform;
54        cues = [];
55        constructor(t) {
56            this.src = t.src,
57            this.encoding = t.dataset.encoding,
58            this.lang = t.srclang,
59            this.kind = t.kind,
60            this.label = t.label,
61            this.default = t.default,
62            this.needsTransform = !this.src.toLowerCase().endsWith(".vtt")
63        }
64        async parse() {
65            this.body = await o(this.src, this.encoding),
66            this.cues = this.body.split(/\r?\n\r?\n/g).map(c).filter(Boolean)
67        }
68    }
69    async function l(n) {
70        const t = [...n.querySelectorAll("track")].map(e => new d(e));
71        for (const e of t) {
72            if (!e.needsTransform)
73                continue;
74            await e.parse();
75            const s = n.addTextTrack(e.kind, e.label, e.lang);
76            e.cues.forEach(r => s.addCue(new VTTCue(r.startTime,r.endTime,r.text))),
77            s.mode = "showing"
78        }
79        // also include inline <script type="text/srt">
80        const inlineScripts = [...n.querySelectorAll('script[type="text/srt"]')];
81        for (const script of inlineScripts) {
82            const label = script.dataset.label || 'English';
83            const lang = script.dataset.lang || 'en';
84            const srt = script.textContent.trim();
85            const cues = srt.split(/\r?\n\r?\n/g).map(c).filter(Boolean);
86            const textTrack = n.addTextTrack('subtitles', label, lang);
87            cues.forEach(r => textTrack.addCue(new VTTCue(r.startTime, r.endTime, r.text)));
88            textTrack.mode = 'showing';
89        }
90    }
91    window.loadTracks = function() {
92        [...document.querySelectorAll("video")].forEach( (v) => {
93            l(v);
94        }
95        );
96    }
97    ;
98}
99)();