@tdb/web/debug.js/node_modules/next/dist/client/dev-error-overlay/eventsource.js

Common condiguration for serving a web-site and testing web-based UI components.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.getEventSourceWrapper = getEventSourceWrapper;

function EventSourceWrapper(options) {
  var source;
  var lastActivity = new Date();
  var listeners = [];

  if (!options.timeout) {
    options.timeout = 20 * 1000;
  }

  init();
  var timer = setInterval(function () {
    if (new Date() - lastActivity > options.timeout) {
      handleDisconnect();
    }
  }, options.timeout / 2);

  function init() {
    source = new window.EventSource(options.path);
    source.onopen = handleOnline;
    source.onerror = handleDisconnect;
    source.onmessage = handleMessage;
  }

  function handleOnline() {
    if (options.log) console.log('[HMR] connected');
    lastActivity = new Date();
  }

  function handleMessage(event) {
    lastActivity = new Date();

    for (var i = 0; i < listeners.length; i++) {
      listeners[i](event);
    }
  }

  function handleDisconnect() {
    clearInterval(timer);
    source.close();
    setTimeout(init, options.timeout);
  }

  return {
    addMessageListener: function addMessageListener(fn) {
      listeners.push(fn);
    }
  };
}

function getEventSourceWrapper(options) {
  if (!window.__whmEventSourceWrapper) {
    window.__whmEventSourceWrapper = {};
  }

  if (!window.__whmEventSourceWrapper[options.path]) {
    // cache the wrapper for other entries loaded on
    // the same page with the same options.path
    window.__whmEventSourceWrapper[options.path] = EventSourceWrapper(options);
  }

  return window.__whmEventSourceWrapper[options.path];
}