tpjnorton

const useWebSocket = (url, protocols, onMessage, onError) => {
  const ws = useRef(null);
  useEffect(() => {
    const socket = new WebSocket(url, protocols);
    socket.onmessage = onMessage;
    socket.onerror = onError;
    ws.current = socket;
    return () => {
      ws.current.close();
    };

tpjnorton

const useMounted = () => {
  const isMounted = useRef(false);

  useEffect(() => {
    isMounted.current = true;
    return () => {
      isMounted.current = false;
    };
  }, []);

tpjnorton

export WEBOTS_HOME=/home/tom/develop/$WEBOTS_VER
export LD_LIBRARY_PATH="/home/tom/develop/$WEBOTS_VER/lib"
export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64
export WEBOTS_ALLOW_MODIFY_INSTALLATION=true
export WEBOTS_DISABLE_SAVE_PERSPECTIVE_ON_CLOSE=1
alias web="cd $WEBOTS_HOME"
alias webots=/home/tom/develop/$WEBOTS_VER/webots

alias trans="web; git checkout -- $WEBOTS_HOME/resources/translations"
alias mks="make release -j 12 -C $WEBOTS_HOME/src/webots"