Event hub

An event hub.

Install

using npm:

npm install @yfill/event-hub --save

or using yarn:

yarn add @yfill/event-hub

Usage

• Import resources.

  import EventHub from "@yfill/event-hub";

  <script src="https://unpkg.com/@yfill/event-hub"></script>

• Create an EventHub instance, and then use it to monitor, broadcast, cancel monitor, and destroy.

  const eh = new EventHub();
  
  const typeHandler0 = (...arg) => {
    console.log("typeHandler0", ...arg);
  };
  const typeHandler1 = (...arg) => {
    console.log("typeHandler1", ...arg);
  };
  const typeHandler2 = (...arg) => {
    console.log("typeHandler2", ...arg);
  };
  const typeHandler3 = (...arg) => {
    console.log("typeHandler3", ...arg);
  };
  
  eh.on("$type", typeHandler0)
    .on("$type", typeHandler1)
    .on("$type", typeHandler2)
    .once("$typeOnce", typeHandler3);
  
  console.log("===First broadcast===");
  eh.emit("$type", "First broadcast", "data")
    .emit("$typeOnce", "First broadcast", "data");
  
  eh.off("$type");
  
  console.log("===Second broadcast===");
  eh.emit("$type", "Second broadcast", "data")
    .emit("$typeOnce", "Second broadcast", "data");
  
  eh.on("$type", typeHandler1)
    .on("$type", typeHandler2);
  
  console.log("===Third broadcast===");
  eh.emit("$type", "Third broadcast", "data0", "data1");
  
  eh.off("$type", typeHandler1);
  
  console.log("===Fourth broadcast===");
  eh.emit("$type", "Fourth broadcast", "data0", "data1", "data2");
  
  eh.destroy();