"use strict"; setup({ single_test: true }); const xhr = new XMLHttpRequest(); // In jsdom's implementation, this would cause a crash, as after firing readystatechange for HEADERS_RECEIVED, it would // try to manipulate internal state. But that internal state got cleared during abort(). So jsdom needed to be modified // to check if that internal state had gone away as a result of firing readystatechange, and if so, bail out. xhr.addEventListener("readystatechange", () => { if (xhr.readyState === xhr.HEADERS_RECEIVED) { xhr.abort(); } else if (xhr.readyState === xhr.DONE) { done(); } }); xhr.open("GET", "/common/blank.html"); xhr.send();