bookmarklet to add vConsole in mobile browser

vconsole.js

javascript: (function() {
    if (document.getElementById('__vconsole')) return;
    function callback() {
        var vConsole = new VConsole();
    }
    var s = document.createElement("script");
    s.src = "https://res.wx.qq.com/mmbizwap/zh_CN/htmledition/js/vconsole/3.0.0/vconsole.min.js";
    if (s.addEventListener) {
        s.addEventListener("load", callback, false)
    } else if (s.readyState) {
        s.onreadystatechange = callback
    }
    document.body.appendChild(s);
})()