jitsi_corner5/inline_script.js

    // <script>
        // IE11 and earlier can be identified via their user agent and be
        // redirected to a page that is known to have no newer js syntax.
        if (window.navigator.userAgent.match(/(MSIE|Trident)/)) {
            var roomName = encodeURIComponent(window.location.pathname);
            window.location.href = "static/recommendedBrowsers.html" + "?room=" + roomName;
        }

        window.indexLoadedTime = window.performance.now();
        console.log("(TIME) index.html loaded:\t", indexLoadedTime);
        // XXX the code below listeners for errors and displays an error message
        // in the document body when any of the required files fails to load.
        // The intention is to prevent from displaying broken page.
        var criticalFiles = [
            "config.js",
            "utils.js",
            "do_external_connect.js",
            "interface_config.js",
            "logging_config.js",
            "lib-jitsi-meet.min.js",
            "app.bundle.min.js",
            "all.css"
        ];
        var loadErrHandler = function(e) {
            var target = e.target;
            // Error on <script> and <link>(CSS)
            // <script> will have .src and <link> .href
            var fileRef = (target.src ? target.src : target.href);
            if (("SCRIPT" === target.tagName || "LINK" === target.tagName)
                && criticalFiles.some(
                    function(file) { return fileRef.indexOf(file) !== -1 })) {
                window.onload = function() {
                    // The whole complex part below implements page reloads with
                    // "exponential backoff". The retry attempt is passes as
                    // "rCounter" query parameter
                    var href = window.location.href;

                    var retryMatch = href.match(/.+(\?|&)rCounter=(\d+)/);
                    var retryCountStr = retryMatch ? retryMatch[2] : "0";
                    var retryCount = Number.parseInt(retryCountStr);

                    if (retryMatch == null) {
                        var separator = href.indexOf("?") === -1 ? "?" : "&";
                        var hashIdx = href.indexOf("#");

                        if (hashIdx === -1) {
                            href += separator + "rCounter=1";
                        } else {
                            var hashPart = href.substr(hashIdx);

                            href = href.substr(0, hashIdx)
                                + separator + "rCounter=1" + hashPart;
                        }
                    } else {
                        var separator = retryMatch[1];

                        href = href.replace(
                            /(\?|&)rCounter=(\d+)/,
                            separator + "rCounter=" + (retryCount + 1));
                    }

                    var delay = Math.pow(2, retryCount) * 2000;
                    if (isNaN(delay) || delay < 2000 || delay > 60000)
                        delay = 10000;

                    var showMoreText = "show more";
                    var showLessText = "show less";

                    document.body.innerHTML
                        = "<div style='"
                        + "position: absolute;top: 50%;left: 50%;"
                        + "text-align: center;"
                        + "font-size: medium;"
                        + "font-weight: 400;"
                        + "transform: translate(-50%, -50%)'>"
                        + "Uh oh! We couldn't fully download everything we needed :("
                        + "<br/> "
                        + "We will try again shortly. In the mean time, check for problems with your Internet connection!"
                        + "<br/><br/> "
                        + "<div id='moreInfo' style='"
                        + "display: none;'>" + "Missing " + fileRef
                        + "<br/><br/></div>"
                        + "<a id='showMore' style='"
                        + "text-decoration: underline;"
                        + "font-size:small;"
                        + "cursor: pointer'>" + showMoreText + "</a>"
                        + "&nbsp;&nbsp;&nbsp;"
                        + "<a id ='reloadLink' style='"
                        + "text-decoration: underline;"
                        + "font-size:small;"
                        + "'>reload now</a>"
                        + "</div>";

                    var reloadLink = document.getElementById('reloadLink');
                    reloadLink.setAttribute('href', href);

                    var showMoreElem = document.getElementById("showMore");
                    showMoreElem.addEventListener('click', function () {
                            var moreInfoElem
                                    = document.getElementById("moreInfo");

                            if (showMoreElem.innerHTML === showMoreText) {
                                moreInfoElem.setAttribute(
                                    "style",
                                    "display: block;"
                                    + "color:#FF991F;"
                                    + "font-size:small;"
                                    + "user-select:text;");
                                showMoreElem.innerHTML = showLessText;
                            }
                            else {
                                moreInfoElem.setAttribute(
                                    "style", "display: none;");
                                showMoreElem.innerHTML = showMoreText;
                            }
                        });

                    window.setTimeout(
                        function () { window.location.replace(href); }, delay);

                    // Call extra handler if defined.
                    if (typeof postLoadErrorHandler === "function") {
                        postLoadErrorHandler(fileRef);
                    }
                };
                window.removeEventListener(
                    'error', loadErrHandler, true /* capture phase */);
            }
        };
        window.addEventListener(
            'error', loadErrHandler, true /* capture phase type of listener */);
    // </script>