@wordpress/data/build/utils/emitter.js

Data module for WordPress.

"use strict";
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __export = (target, all) => {
  for (var name in all)
    __defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
  if (from && typeof from === "object" || typeof from === "function") {
    for (let key of __getOwnPropNames(from))
      if (!__hasOwnProp.call(to, key) && key !== except)
        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
  }
  return to;
};
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);

// packages/data/src/utils/emitter.ts
var emitter_exports = {};
__export(emitter_exports, {
  createEmitter: () => createEmitter
});
module.exports = __toCommonJS(emitter_exports);
function createEmitter() {
  let isPaused = false;
  let isPending = false;
  const listeners = /* @__PURE__ */ new Set();
  const notifyListeners = () => (
    // We use Array.from to clone the listeners Set
    // This ensures that we don't run a listener
    // that was added as a response to another listener.
    Array.from(listeners).forEach((listener) => listener())
  );
  return {
    get isPaused() {
      return isPaused;
    },
    subscribe(listener) {
      listeners.add(listener);
      return () => listeners.delete(listener);
    },
    pause() {
      isPaused = true;
    },
    resume() {
      isPaused = false;
      if (isPending) {
        isPending = false;
        notifyListeners();
      }
    },
    emit() {
      if (isPaused) {
        isPending = true;
        return;
      }
      notifyListeners();
    }
  };
}
// Annotate the CommonJS export names for ESM import in node:
0 && (module.exports = {
  createEmitter
});
//# sourceMappingURL=emitter.js.map