Inject / Intercepting Express 4 res.render with ES6

gistfile1.txt

//custom middlewhare
mount.use( function( req, res, next ) {
    //trap any render function call for this mount
    res.render = new Proxy(res.render,{
        apply(target, thisArg, argumentsList){
            //DI data intercept
            //BEWARE, i have not added if statements for the potential render arguments
            //push a callback
            //you could push a data object here.
            //you could even catch errors and render that!
            argumentsList.push(function(err, html){
                //intercept html
                console.log(html)
                //Lets use cherio to modify the rendered template
                let $ = cheerio.load(html)
                $('h1').text('Hello there!')
                res.send($.html());
            })
            //retrun modified html
            return Reflect.apply(target, thisArg, argumentsList)
        }
    })
    next()
});