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Learning jQuery - Fourth Edition by Karl Swedberg, Jonathan Chaffer

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Handling Ajax errors

Introducing any kind of network interaction into an application brings along some degree of uncertainty. The user's connection could drop in the middle of an operation or a temporary server issue could interrupt communications. Because of these reliability concerns, we should always plan for the worst case and prepare for error scenarios.

The $.ajax() function can take a callback function named error to be called in these situations. In this callback, we should provide some kind of feedback to the user indicating that an error has occurred:

$(document).ready(function() {
  var $ajaxForm = $('#ajax-form'),
      $response = $('#response'),
      noresults = 'There were no search results.',
      failed = 'Sorry, but the request could not ' +

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