如何从流星js中的另一个客户端触发客户端事件

Question

I have one client app for a tablet and one for a notebook. Those apps are located in the client folder: "tablet" and "monitor" respectively. My question is, is it possible to trigger an event from the tablet app to the notebook app? Because I want to switch through a pagination synchronously.

Answer 1

The typical pattern for this in Meteor would be to save or update a document in a collection that is subscribed to by both clients and then have the clients react to that new or updated value.

For example:

lib:

SharedState = new Mongo.Collection('sharedstate');

server:

Meteor.publish('shared',function(){
  return SharedState.find({ userId: this.userId });
});

client:

Meteor.subscribe('shared');

in your client that is creating the event:

SharedState.upsert(
  { userId: Meteor.userId() },
  { userId: Meteor.userId(), state: "foo" }
);

Then in your client that is looking for the event use a Tracker.autorun (or alternatively, observeChanges ) to see that the shared state has changed:

Tracker.autorun(function(){
  let state = SharedState.findOne({ userId: Meteor.userId() });
  if ( state === "foo" ){
    ... do your thing
  }
});

Here I'm assuming that your app running on your tablet and notebook are being used by the same user - hence the key for the shared state is the userId . If OTOH you were sharing state across a classroom (one teacher, several students), then you might use something like classroomId instead.