Created
February 15, 2019 10:47
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Web worker count down
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| <!DOCTYPE html> | |
| <html> | |
| <body> | |
| <button onclick="startWorker()">Start Count</button> | |
| <p>Count down <span id="number_view"></span></p> | |
| <script> | |
| var w; | |
| var start_number = 10; | |
| function startWorker() { | |
| start_number = prompt("Count down from "); | |
| if(typeof(Worker) !== "undefined") { | |
| if(typeof(w) == "undefined") { | |
| w = new Worker("ww.js"); | |
| } | |
| w.postMessage(start_number); | |
| w.onmessage = function(event) { | |
| document.getElementById("number_view").innerHTML = event.data; | |
| }; | |
| } else { | |
| document.getElementById("number_view").innerHTML = "Sorry, your browser does not support Web Workers..."; | |
| } | |
| } | |
| function stopWorker() { | |
| w.terminate(); | |
| w = undefined; | |
| } | |
| </script> | |
| </body> | |
| </html> |
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| var i=10; | |
| function timedCount() { | |
| i=i-1; | |
| if(i < 0){ | |
| close(); | |
| } | |
| postMessage(i); | |
| setTimeout("timedCount()", 500); | |
| } | |
| onmessage = function(e){ | |
| i = e.data; | |
| timedCount(); | |
| } |
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