rviscomi

CrUX.now() (bit.ly/crux-now)

(10min demo at the performance.now() meetup, 20 November 2019, Amsterdam)

CrUX is the Chrome User Experience Report, a public dataset of performance and UX data from real Chrome users in the field.

Quick facts:

• Launched in November 2017
• Monthly data dumps (second Tuesday)

mgol

jQuery source is now authored using ES6 modules. It's possible to use them directly in the browser without any build process.

To test it locally, first clone the jQuery repository:

git clone git@github.com:jquery/jquery.git

Then, write the following index.html file:

DavidWells

/* Helper buddy for removing async/await try/catch litter 🗑 */
function O_o(promise) {
  return promise.then(data => {
    if (data instanceof Error) return [data]
    return [null, data]
  }).catch(err => [err])
}

/* Look ma, no try/catch */
async function usageExample(params) {

davej

Promise.race([
  fetch('/foo'),
  new Promise((_, reject) =>
    setTimeout(() => reject(new Error('Timeout')), 7000)
  )
]);

jterrace

XVFB=/usr/bin/Xvfb
XVFBARGS=":1 -screen 0 1024x768x24 -ac +extension GLX +render -noreset"
PIDFILE=/var/run/xvfb.pid
case "$1" in
  start)
    echo -n "Starting virtual X frame buffer: Xvfb"
    start-stop-daemon --start --quiet --pidfile $PIDFILE --make-pidfile --background --exec $XVFB -- $XVFBARGS
    echo "."
    ;;
  stop)