Scripting Enhancements - HTML5 with Visual Studio 2012 - page 115

function sendResponse(senderPort, message) {
senderPort.postMessage( message);
}

4. Add another file in the Scripts folder named controlSharedWorker.js and enter the

implementation shown in Listing 5-6. i will explain this code later.

Listing 5-6. The controlSharedWorker.js implementation
/* This file contains functions used to
communicate with the web worker */
var mySharedWorker;
function createSharedWorker() {
if (typeof(Worker) !== "undefined") {
var log=document.querySelector("#output");
log.value +="Starting shared worker process... ";
mySharedWorker=new SharedWorker("Scripts/sharedWorker.js");
log.value +="Adding listener... ";
mySharedWorker.port.addEventListener("message", function(event){
log.value +=event.data + "\n";
}, false);
mySharedWorker.port.start();
log.value +="Done!\n";
}
else {
alert("Your browser does not support web workers");
}
}
function sendSharedWorkerMessage(){
if (mySharedWorker !== null) {
var log=document.querySelector("#output");
log.value +="Sending message... ";
var message=document.querySelector("#messageS");
mySharedWorker.port.postMessage(message.value);
log.value +="Done!\n";
}
}
function closeSharedWorker(){
if (mySharedWorker !== null) {
var log=document.querySelector("#output");
log.value +="Closing worker... ";
mySharedWorker.port.terminate;
mySharedWorker=null;
log.value +="Done!\n";
}
}