Adds/modifies examples for node.js and webpack.

examples/webpack/main.js

@@ -0,0 +1,32 @@
+// Any copyright is dedicated to the Public Domain.
+// http://creativecommons.org/licenses/publicdomain/
+
+// Hello world example for webpack.
+
+require('pdfjs-dist');
+
+var pdfPath = '../helloworld/helloworld.pdf';
+
+// It is also possible to disable workers via `PDFJS.disableWorker = true`,
+// however that might degrade the UI performance in web browsers.
+
+// Loading a document.
+var loadingTask = PDFJS.getDocument(pdfPath);
+loadingTask.promise.then(function (pdfDocument) {
+  // Request a first page
+  return pdfDocument.getPage(1).then(function (pdfPage) {
+    // Display page on the existing canvas with 100% scale.
+    var viewport = pdfPage.getViewport(1.0);
+    var canvas = document.getElementById('theCanvas');
+    canvas.width = viewport.width;
+    canvas.height = viewport.height;
+    var ctx = canvas.getContext('2d');
+    var renderTask = pdfPage.render({
+      canvasContext: ctx,
+      viewport: viewport
+    });
+    return renderTask.promise;
+  });
+}).catch(function (reason) {
+  console.error('Error: ' + reason);
+});