OLD | NEW |
| (Empty) |
1 <html> | |
2 <body onload="onLoad()"> | |
3 <script> | |
4 | |
5 function log(message) { | |
6 var div = document.createElement('div'); | |
7 div.innerText = message; | |
8 document.getElementById('console').appendChild(div); | |
9 } | |
10 | |
11 function strike(id) { | |
12 document.getElementById(id).style.textDecoration = "line-through" | |
13 } | |
14 | |
15 function onLoad() { | |
16 if (!Worker.prototype.postMessage) { // fake workers | |
17 strike('s1'); | |
18 strike('s2'); | |
19 log('[using fake workers]'); | |
20 } else { | |
21 log('[using real workers]'); | |
22 } | |
23 } | |
24 | |
25 var primeWorker; | |
26 var invalidWorker; | |
27 var count; | |
28 var timer; | |
29 | |
30 function startWorkers() { | |
31 startButton.disabled = true; | |
32 | |
33 primeWorker = new Worker('resources/worker-primes.js');
| |
34 primeWorker.onmessage = onMessage; | |
35 primeWorker.onerror = onError; | |
36 primeWorker.postMessage(2); | |
37 count = 3; | |
38 | |
39 timer = setInterval(onTimer, 1000); | |
40 try { | |
41 invalidWorker = new Worker('non-existent-worker.js'); | |
42 } catch(e) { | |
43 } | |
44 log('Started worker'); | |
45 } | |
46 | |
47 function onTimer() { | |
48 primeWorker.postMessage(count); | |
49 count+=2; | |
50 } | |
51 | |
52 function onMessage(event) { | |
53 if (event.data[1]) { | |
54 log(event.data[0]); | |
55 if (event.data[0] === 5) | |
56 strike('s6'); | |
57 } | |
58 } | |
59 | |
60 function onError(event) { | |
61 log('Error in worker: ' + event.message); | |
62 strike('s8'); | |
63 } | |
64 | |
65 function causeError() { | |
66 primeWorker.postMessage('forty two'); | |
67 } | |
68 | |
69 function stopWorker() { | |
70 log('Stopping worker...'); | |
71 if (timer) { | |
72 clearInterval(timer); | |
73 timer = 0; | |
74 } | |
75 primeWorker.terminate(); | |
76 startButton.disabled = false; | |
77 } | |
78 | |
79 </script> | |
80 | |
81 <h1>Tests debugging of HTML5 Workers</h1> | |
82 | |
83 <ol> | |
84 | |
85 <li id="s1">Open DevTools, Scripts Panel; Tick Debug on Workers sidebar.</li> | |
86 <li id="s2">Reload the page.</li> | |
87 <li id="s3"><button onclick="startWorkers()" id="startButton">Start Worker</butt
on></li> | |
88 <li id="s4">Observe 2 workers appear in the worker sidebar pane (including non-e
xistent-worker.js)"</li> | |
89 <li id="s5">Observe worker-primes.js and primes.js appear in scripts drop-down b
ox.</li> | |
90 <li id="s6">Assure primes are being logged to test console below.</li> | |
91 <li id="s7">Set a breakpoint on one of worker scripts, assure it's hit.</li> | |
92 <li id="s8">Try causing an error in worker, observe it's logged in DevTools cons
ole and in test console below. | |
93 <button onclick="causeError()">Cause Error</button> | |
94 <li id="s9"><button onclick="stopWorker()">Stop Worker</button></li> | |
95 | |
96 </ol> | |
97 | |
98 <div id="console" style="font-family: courier; background-color: black; color: g
reen; width: 80em; height: 25em; overflow: scroll"> | |
99 </div> | |
100 | |
101 </body> | |
102 </html> | |
OLD | NEW |