1const loadAudio = [
 2    new Audio(url="res/sfx/os/loadelement1.ogg"),
 3    new Audio(url="res/sfx/os/loadelement2.ogg"),
 4    new Audio(url="res/sfx/os/loadelement3.ogg"),
 5    new Audio(url="res/sfx/os/loadelement4.ogg")
 6]
 7const not_allowed = ["AUDIO", "META", "TITLE", "LINK", "SOURCE", "SCRIPT", "BR"];
 8
 9function getRandomInt(min, max) {
10    min = Math.ceil(min);
11    return Math.floor(Math.random() * (Math.floor(max) - min + 1)) + min;
12}
13
14function playAudio(audio){
15    audio.volume = 0.1;
16    audio.currentTime = 0;
17    audio.play();
18}
19
20function slow_load(speed=10, not_allowed=[], callback) {
21    
22    function onFinish(node, initial_display){
23        node.style.display = initial_display;
24        counter++;
25        ratio = counter / total * 100;
26        
27        randomAudio();
28    
29        if (ratio >= 100 && callback)
30            callback()
31    }
32    
33    const all = document.getElementsByTagName("*");
34    let counter = 0;
35    let total = 0;
36    let i = 0;
37    for (element in all) {
38
39        const node = all[element];
40        if((node.childElementCount == 0) && (not_allowed.indexOf(node.tagName) === -1) && node.style){
41            i += getRandomInt(250 / speed, 500 / speed);
42            total++;
43            const initial_display = node.style.display;
44            node.style.display = "none";
45            setTimeout(() => { onFinish(node, initial_display);}, i);
46        }
47    }
48}
49
50function randomAudio(){
51    const random_audio = getRandomInt(0, loadAudio.length - 1);
52    playAudio(loadAudio[random_audio]);
53}