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/**
* Any copyright is dedicated to the Public Domain.
*/
let xhr;
onmessage = function (event) {
if (event.data == "SEND") {
xhr = new XMLHttpRequest();
xhr.open("GET", "slow.sjs", true);
// OPENED + send flag is enough for abort() to run the request error steps.
xhr.send();
postMessage("SENT");
return;
}
// The parent holds the main thread, so we park inside abort()'s dispatch.
xhr.abort();
};