[JavaScript] Properly Working with Ajax Requests

00-initial-function.js

var _processArticle = function() {

  var request =
    $.post(acme.ajax_url, {
      action:  'acme_get_data',
      url:      sUrl
      security: acme.security
    }, function(response) {
      // ...
    })
    .done(function(response) {
      // ...
    })
    .fail(function(xhr, status, error) {
      // ...
    })
    .always(function() {
      // ..
    });
}

01-handle-success.js

var _processArticle = function() {

  var request =
    $.post(acme.ajax_url, {
      action:  'acme_get_data',
      url:      sUrl
      security: acme.security
    }, function(response) {
      
      // Abort all request operations.
      if (false === response.success) {
        request.abort();
      }
      
      // Handle the successful response by modifying the DOM.
    })
    .done(function(response) {
      // ...
    })
    .fail(function(xhr, status, error) {
      // ...
    })
    .always(function() {
      // ...
    });
}

02-handle-failure.js

var _processArticle = function() {

  var request =
    $.post(acme.ajax_url, {
      action:  'acme_get_data',
      url:      sUrl
      security: acme.security
    }, function(response) {
      
      // Abort all request operations.
      if (false === response.success) {
        request.abort();
      }
      
      // Handle the successful response by modifying the DOM like flashing the first image.
      $('img:first').fadeTo('fast', 0.5, function() {
        $(this).fadeTo('fast', 1);
      });
    })
    .done(function(response) {
      // ...
    })
    .fail(function(xhr, status, error) {
      
      console.log('There was a problem with contacting the API.');
      
      console.log('The status was:');
      console.log(status);
      
      console.log('The error was:')
      cosole.log(error);
    })
    .always(function() {
      // ...
    });
}

03-handle-always.js

var _processArticle = function() {

  var request =
    $.post(acme.ajax_url, {
      action:  'acme_get_data',
      url:      sUrl
      security: acme.security
    }, function(response) {
      
      // Abort all request operations.
      if (false === response.success) {
        request.abort();
      }
      
      // Handle the successful response by modifying the DOM like flashing the first image.
      $('img:first').fadeTo('fast', 0.5, function() {
        $(this).fadeTo('fast', 1);
      });
    })
    .done(function(response) {
      // ...
    })
    .fail(function(xhr, status, error) {
      
      console.log('There was a problem with contacting the API.');
      
      console.log('The status was:');
      console.log(status);
      
      console.log('The error was:')
      console.log(error);
    })
    .always(function() {
      // Regardless of what happens, this is where you can provide the user feedback.
    });
}

04-handle-success-again.js

var _processArticle = function() {

  var request =
    $.post(acme.ajax_url, {
      action:  'acme_get_data',
      url:      sUrl
      security: acme.security
    }, function(response) {
      
      // Abort all request operations.
      if (false === response.success) {
        request.abort();
      }
      
      // Handle the successful response by modifying the DOM.
    })
    .done(function(response) {
      // Display any additional changes you may want to make based on the respnse.
    })
    .fail(function(xhr, status, error) {
      
      console.log('There was a problem with contacting the API.');
      
      console.log('The status was:');
      console.log(status);
      
      console.log('The error was:')
      console.log(error);
    })
    .always(function() {
      // Regardless of what happens, this is where you can provide the user feedback.
    });
}