Javascript - Dispatch event to all objects in a set

Question

How do I dispatch a custom event to all the custom objects in my set?

class Node{...}

a = new Node(...);
b = new Node(...);

var nodeSet = new Set(...);
let myEvent = new CustomEvent(...);

for (var node of nodeSet){
     node.shape.dispatchEvent(myEvent); 
}

Node.shape is a Konva Shape

Please keep the replies easy to understand since I am a beginner in Javascript, thanks.

Answer 1

To make your custom event work with Konva Node objects, the Shape subclass has an on method that will allow you to register your listener directly on the shape.

Do this:

class Node{...}

a = new Node(...);
b = new Node(...);
a.shape.on('Yo!', handler);
b.share.on('Yo!', handler);
  // all 4000 shapes

var nodeSet = new Set(...);
let myEvent = new CustomEvent('Yo!');

// If you only have one handler for every shape's treatment of CustomEvent
for (var node of nodeSet){
     node.shape.on('Yo!', handler);
}

for (var node of nodeSet){
     node.shape.dispatchEvent(myEvent); 
}