A Worker via a Blob Script

The JavaScript code example demonstrates how to program a mutlithreaaded worker that uses a built-in blob script.

BlobScript.html

<!DOCTYPE html>
<html>
  <head>
    <title>XoaX.net's Javascript</title>
    <script type="text/javascript" src="BlobScript.js"></script>
  </head>
  <body onload="Initialize()">
  	<label for="idFactorization"><b id="idN"></b> = <input id="idFactorization" type="text" size="21" /></label>
  </body>
</html>

BlobScript.js

// NOTE: THIS REQUIRES A WEB SERVER TO RUN
function Initialize() {
	// Create a worker with a Blob as its script
	var qWorker =  new Worker(URL.createObjectURL(new Blob([
`
	function Factor(iN) {
		var iaFactors = [];
		var iM = iN;
		while (iM > 1) {
			for (var i = 2; i <= iM; ++i) {
				while ((iM % i) == 0) {
					iaFactors.push(i);
					iM /= i;
				}
			}
		}
		return iaFactors;
	}
	
	onmessage = function(event) {
		const kiN = parseInt(event.data);
		var iaFactors = Factor(kiN);
		postMessage(iaFactors);
	};`], { type: "text/javascript" })));
	
	
	// Receive factorization messages from the worker
	qWorker.onmessage = function(qEvent) {
		var iaFactors = qEvent.data;
		var sFactoriation = "";
		for (var i = 0; i < iaFactors.length - 1; ++i) {
			sFactoriation += iaFactors[i] + " * ";
		}
		sFactoriation += iaFactors[iaFactors.length - 1];
		var qFactElement = document.getElementById("idFactorization");
		qFactElement.value = sFactoriation;
	}
	// Generate a number between 2 and 1000
	var iN = Math.floor((Math.random() * 999) + 2);
	var qN = document.getElementById("idN");
	qN.innerHTML = iN;
	qWorker.postMessage(iN);
}

Core JavaScript

A Worker via a Blob Script

BlobScript.html

BlobScript.js

Output