Scrap mp3 urls from vk.com music pages

vktracks.js

var trackElements = document.querySelectorAll(".audio");
 
console.log("Loaded " + trackElements.length + " track");
 
var tracks = [];
for (var i = 0; i < trackElements.length; ++i) {
    var trackElement = trackElements[i];
    var input = trackElement.querySelector("input");
    var title = trackElement.querySelector(".title_wrap");
    if (!input || !title) {
        console.warn("DOM is irregular?!");
        continue;
    }
    var url = input.value.split("?").shift();
    var name = title.textContent.trim();
    tracks.push({name: name, url: url});
}
 
var text = "";
for (var i = 0; i < tracks.length; ++i)
    text += (tracks[i].url + "@" + tracks[i].name) + "\n";