A bookmarklet to show which Javascript libraries are running on a webpage.

Library-Detector.js

//full credit for this to https://github.com/andrewbredow using his Library-Detector-for-Chrome
(function() {
    function callback() {
        var tests = d41d8cd98f00b204e9800998ecf8427e_LibraryDetectorTests;
        var libraries = [];
        for (var i in tests) {
            try {
                var result = tests[i].test(window);
                if (result === false) continue;
                libraries.push({
                    name: i,
                    version: result.version
                })
            } catch (e) {
                console.log("Library Detector test for " + i + " failed:", e)
            }
        }
        var existing = "";
        for (var x = 0; x < libraries.length; x++) {
            existing += libraries[x].name + ": " + libraries[x].version + "\n"
        }
        alert(existing)
    }
    var s = document.createElement("script");
    s.src = "https://cdn.rawgit.com/andrewbredow/Library-Detector-for-Chrome/master/library/libraries.js";
    if (s.addEventListener) {
        s.addEventListener("load", callback, false)
    } else if (s.readyState) {
        s.onreadystatechange = callback
    }
    document.body.appendChild(s);
})()

Minified bookmarklet

javascript:(function()%7Bfunction%20callback()%7Bvar%20tests%3Dd41d8cd98f00b204e9800998ecf8427e_LibraryDetectorTests%3Bvar%20libraries%3D%5B%5D%3Bfor(var%20i%20in%20tests)%7Btry%7Bvar%20result%3Dtests%5Bi%5D.test(window)%3Bif(result%3D%3D%3Dfalse)continue%3Blibraries.push(%7Bname%3Ai%2Cversion%3Aresult.version%7D)%7Dcatch(e)%7Bconsole.log(%22Library%20Detector%20test%20for%20%22%2Bi%2B%22%20failed%3A%22%2Ce)%7D%7Dvar%20existing%3D%22%22%3Bfor(var%20x%3D0%3Bx%3Clibraries.length%3Bx%2B%2B)%7Bexisting%2B%3Dlibraries%5Bx%5D.name%2B%22%3A%20%22%2Blibraries%5Bx%5D.version%2B%22%5Cn%22%7Dalert(existing)%7Dvar%20s%3Ddocument.createElement(%22script%22)%3Bs.src%3D%22https%3A%2F%2Fcdn.rawgit.com%2Fandrewbredow%2FLibrary-Detector-for-Chrome%2Fmaster%2Flibrary%2Flibraries.js%22%3Bif(s.addEventListener)%7Bs.addEventListener(%22load%22%2Ccallback%2Cfalse)%7Delse%20if(s.readyState)%7Bs.onreadystatechange%3Dcallback%7Ddocument.body.appendChild(s)%3B%7D)()