an idea on how to add context-sensitive help to WinJS apps and Durandal apps. Just adding code like this to the "default.js" code .. "app" being the WinJS.Application object

gistfile1.txt

    // add Help link in settings
    app.onsettings = function (e) {
        var commands = {};

        /****** HELP ******/
        // To add Context-sensitive help
        // set a default help URL (/help/index.html)
        var helpUrl = '/help/index.html';

        // grab the currently active vm and check for a "helpUrl" property on the vm.
        // Also, we may be able to walk the "router.parent" chain if we're using child routers
        
        var router = require('plugins/router');
        var vm = router.activeItem();
        if (vm && vm.helpUrl) {
            helpUrl = vm.helpUrl;
        }

        // whichever file is being used, set it up for the "Help" link like this:
        commands.help = { title: "Help", href: helpUrl };
        
        e.detail.applicationcommands = commands;

        WinJS.UI.SettingsFlyout.populateSettings(e);
    };