Method createSocket

test/fixtures/wpt/resources/channel.sub.js:55–64

()

        async getOrCreate(type, uuid, onmessage=null) {
            function createSocket() {
                let protocol = self.isSecureContext ? "wss" : "ws";
                let port = self.isSecureContext? "{{ports[wss][0]}}" : "{{ports[ws][0]}}";
                let url = `${protocol}://{{host}}:${port}/msg_channel?uuid=${uuid}&direction=${type}`;
                let socket = new WebSocket(url);
                if (onmessage !== null) {
                    socket.onmessage = onmessage;
                };
                return new Promise(resolve => socket.addEventListener("open", () => resolve(socket)));
            }

            let socket;
            if (type === "read") {