Loading Bar For Pdf.js

You can use it in the following way:

var progressCallback = function(progress){
    var percentLoaded = progress.loaded / progress.total;
    console.log(progress); // Progress has loaded and total
};

PDFJS.getDocument = function getDocument(source,
                                     pdfDataRangeTransport,
                                     passwordCallback,
                                     progressCallback) {
// Do something...
});

Hope it helps!