Docs for the SharedWorker connect event
Docs for the ports property itself
Here's example code which takes a client connection and references a port; this code runs as a SharedWorker (e.g. worker.js):
onconnect = evt => {
// Client connection represented by `evt`
const port = evt.ports[0];
port.onmessage = msg => {
// Client sent us something, represented by `msg`
// We can reply with `port.postMessage`
};
};
Why is an array of (i.e. potentially a plurality of) ports exposed? When will a SharedWorker ever have more than one port per client, and what would multiple ports represent in such a case? Two different ports connecting the same two agents? (Is there some potential to increase bandwidth at an OS-level by making more ports available??)
The above code ignores all ports other than first - is it always better to use the following instead?
onconnect = evt => {
// Client connection represented by `evt`
for (const port of evt.ports) {
// For each client port, listen to messages on that port (?)
port.onmessage = msg => {
// Client sent us something, represented by `msg`
// We can reply with `port.postMessage`
};
}
};