How to Use pdf.js [closed]

There is documentation available on their github readme. They cite the following example code:

/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- *//* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: *///// See README for overview//'use strict';//// Fetch the PDF document from the URL using promises//PDFJS.getDocument('helloworld.pdf').then(function(pdf) {  // Using promise to fetch the page  pdf.getPage(1).then(function(page) {    var scale = 1.5;    var viewport = page.getViewport(scale);    //    // Prepare canvas using PDF page dimensions    //    var canvas = document.getElementById('the-canvas');    var context = canvas.getContext('2d');    canvas.height = viewport.height;    canvas.width = viewport.width;    //    // Render PDF page into canvas context    //    var renderContext = {      canvasContext: context,      viewport: viewport    };    page.render(renderContext);  });});

Try Google'ing pdf.js documentation

/* create the PDF document */var doc = new pdf();doc.text(20, 20, 'hello, I am PDF.');doc.text(20, 30, 'i was created in the browser using javascript.');doc.text(20, 40, 'i can also be created from node.js');/* Optional - set properties on the document */doc.setProperties({  title: 'A sample document created by pdf.js',  subject: 'PDFs are kinda cool, i guess',          author: 'Marak Squires',  keywords: 'pdf.js, javascript, Marak, Marak Squires',  creator: 'pdf.js'});doc.addPage();doc.setFontSize(22);doc.text(20, 20, 'This is a title');doc.setFontSize(16); doc.text(20, 30, 'This is some normal sized text underneath.');var fileName = "testFile"+new Date().getSeconds()+".pdf";var pdfAsDataURI = doc.output('datauri', {"fileName":fileName});

NOTE: the "pdf.js" project mentioned here is https://github.com/Marak/pdf.js, and has been deprecated since this answer was posted. @Treffynnon's answer is about the still-active Mozilla project (https://github.com/mozilla/pdf.js) that most searchers will be looking for.