@lifaon/rx-js-light/cjs/src/observable/built-in/from/without-notifications/dom/from-resize-observer/from-resize-observer.cjs

Blazing fast Observables

"use strict";
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.fromResizeObserver = void 0;
var create_multicast_source_1 = require("../../../../../../observer-observable-pair/build-in/source/built-in/multicast-source/create-multicast-source.cjs");
var freeze_1 = require("../../../../../../misc/helpers/freeze.cjs");
var RESIZE_OBSERVER_AND_SUBSCRIPTION_CACHED;
function getResizeObserverAndSubscription() {
  if (RESIZE_OBSERVER_AND_SUBSCRIPTION_CACHED === void 0) {
    var source_1 = (0, create_multicast_source_1.createMulticastSource)();
    var observer = new ResizeObserver(function (entries) {
      source_1.emit(entries);
    });
    RESIZE_OBSERVER_AND_SUBSCRIPTION_CACHED = (0, freeze_1.freeze)({
      subscribe: source_1.subscribe,
      observer: observer
    });
  }
  return RESIZE_OBSERVER_AND_SUBSCRIPTION_CACHED;
}
function fromResizeObserver(element, options) {
  return function (emit) {
    var running = true;
    var _a = getResizeObserverAndSubscription(), subscribe = _a.subscribe, observer = _a.observer;
    var unsubscribe = subscribe(function (entries) {
      for (var i = 0, l = entries.length; i < l; i++) {
        var entry = entries[i];
        if (running && entry.target === element) {
          emit(entry);
          break;
        }
      }
    });
    observer.observe(element, options);
    return function () {
      if (running) {
        running = false;
        unsubscribe();
        observer.unobserve(element);
      }
    };
  };
}
exports.fromResizeObserver = fromResizeObserver;