Convert Blob data to Raw buffer in javascript or node

Question

I am using a plugin jsPDF which generates PDF and saves it to local file system. Now in jsPDF.js, there is some piece of code which generates pdf data in blob format as:-

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Answer 1

           var blob = new Blob([array], {type: "application/pdf"});

            var arrayBuffer, uint8Array;
            var fileReader = new FileReader();
            fileReader.onload = function() {
                arrayBuffer = this.result;
                uint8Array  = new Uint8Array(arrayBuffer);

                var printer = require("./js/controller/lib");
                printer.printDirect({
                    data: uint8Array,
                    printer:'Deskjet_3540',
                    type: 'PDF',
                    success: function(id) {
                        console.log('printed with id ' + id);
                    },
                    error: function(err) {
                        console.error('error on printing: ' + err);
                    }
                })
            };
            fileReader.readAsArrayBuffer(blob);

This is the final code which worked for me. The printer accepts uint8Array encoding format.