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<body></body>
<script>
const BC0_FIRST_MSG = 'from BC0 - first';
const BC1_FIRST_MSG = 'from BC1 - first';
const BC2_FIRST_MSG = 'from BC2 - first';
const BC3_FIRST_MSG = 'from BC3 - first';
const BC0_SECOND_MSG = 'from BC0 - second';
const BC1_SECOND_MSG = 'from BC1 - second';
const BC2_SECOND_MSG = 'from BC2 - second';
const BC3_SECOND_MSG = 'done';
const BC0_TARGET_NAME = 'BC1';
const BC1_TARGET_NAME = 'BC1';
const BC2_TARGET_NAME = 'BC2';
const BC3_TARGET_NAME = 'BC3';
const MULTI_FRAME_ORDERING_TEST_CHANNEL_NAME = 'multi-frame-order';
var bc1, bc2, bc3;
var sentMessageCountForBc1 = 0;
var sentMessageCountForBc2 = 0;
var sentMessageCountForBc3 = 0;
var bc1_handler = e => {
window.top.logReceivedMessage(BC1_TARGET_NAME, e);
switch(sentMessageCountForBc1) {
case 0:
bc3 = new BroadcastChannel(MULTI_FRAME_ORDERING_TEST_CHANNEL_NAME);
bc3.onmessage = bc3_handler;
bc1.postMessage(BC1_FIRST_MSG);
break;
case 1:
bc1.postMessage(BC1_SECOND_MSG);
break;
case 2:
bc1.close();
return;
}
sentMessageCountForBc1 += 1;
}
var bc2_handler = e => {
window.top.logReceivedMessage(BC2_TARGET_NAME, e);
switch(sentMessageCountForBc2) {
case 0:
bc2.postMessage(BC2_FIRST_MSG);
bc2.postMessage(BC2_SECOND_MSG);
sentMessageCountForBc2 += 2;
break;
case 2:
bc2.close();
return;
}
};
var bc3_handler = e => {
window.top.logReceivedMessage(BC3_TARGET_NAME, e);
switch(sentMessageCountForBc3) {
case 0:
bc3.postMessage(BC3_FIRST_MSG);
break;
case 1:
bc3.postMessage(BC3_SECOND_MSG);
break;
case 2:
bc3.close();
return;
}
sentMessageCountForBc3 += 1;
};
window.onload = function() {
const params = new URLSearchParams(window.location.search);
if (params.get('id') === 'iframe1') {
bc1 = new BroadcastChannel(MULTI_FRAME_ORDERING_TEST_CHANNEL_NAME);
bc1.onmessage = bc1_handler;
} else if (params.get('id') === 'iframe2') {
bc2 = new BroadcastChannel(MULTI_FRAME_ORDERING_TEST_CHANNEL_NAME);
bc2.onmessage = bc2_handler;
}
}
</script>
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