web/web_switch_company_warning/static/src/js/switch_company_warning_worker.js

"use strict";
//Show a big banner in the top of the page if the company has been
//changed in another tab or window (in the same browser)

var con = [];
var lastCtx = null;

addEventListener("connect", function(ee) {
    var port = ee.ports[0];
    con.push(port);

    port.onmessage = function (e) {
        var newCtx = e.data;

        if (lastCtx && newCtx !== lastCtx) {
            con.forEach(function (eport) {
                eport.postMessage({type: "newCtx", "newCtx": newCtx, "lastCtx": lastCtx});
            });
        }
        lastCtx = newCtx;
    };
}, false);