关于 javascript:XMLHTTPRequest Error: Synchronous XMLHttpRequest on the main thread is deprecated … (SoundCloud API) apijavascriptsoundcloudsynchronousxmlhttprequest
关于javascript:Why XmlHttpRequest readyState = 2 on 200 HTTP response code ajaxhttp-status-code-200javascriptphpxmlhttprequest
关于 ajax：如何在 Chrome 中发送推送通知(Progressive Web Apps) ajaxgoogle-cloud-messagingprogressive-web-appspush-notificationxmlhttprequest