node_modules/webpack-dev-server/client/socket.js

'use strict';
/* global __webpack_dev_server_client__ */

/* eslint-disable
  camelcase
*/
// this SockJSClient is here as a default fallback, in case inline mode
// is off or the client is not injected. This will be switched to
// WebsocketClient when it becomes the default
// important: the path to SockJSClient here is made to work in the 'client'
// directory, but is updated via the webpack compilation when compiled from
// the 'client-src' directory

var Client = typeof __webpack_dev_server_client__ !== 'undefined' ? __webpack_dev_server_client__ : // eslint-disable-next-line import/no-unresolved
require('./clients/SockJSClient');
var retries = 0;
var client = null;

var socket = function initSocket(url, handlers) {
  client = new Client(url);
  client.onOpen(function () {
    retries = 0;
  });
  client.onClose(function () {
    if (retries === 0) {
      handlers.close();
    } // Try to reconnect.


    client = null; // After 10 retries stop trying, to prevent logspam.

    if (retries <= 10) {
      // Exponentially increase timeout to reconnect.
      // Respectfully copied from the package `got`.
      // eslint-disable-next-line no-mixed-operators, no-restricted-properties
      var retryInMs = 1000 * Math.pow(2, retries) + Math.random() * 100;
      retries += 1;
      setTimeout(function () {
        socket(url, handlers);
      }, retryInMs);
    }
  });
  client.onMessage(function (data) {
    var msg = JSON.parse(data);

    if (handlers[msg.type]) {
      handlers[msg.type](msg.data);
    }
  });
};

module.exports = socket;