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The JavaScript JSON Cookbook

The JavaScript JSON Cookbook

By : Ray Rischpater, Brian Ritchie
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The JavaScript JSON Cookbook

The JavaScript JSON Cookbook

1 (2)
By: Ray Rischpater, Brian Ritchie

Overview of this book

If you're writing applications that move structured data from one place to another, this book is for you. This is especially true if you've been using XML to do the job because it's entirely possible that you could do much of the same work with less code and less data overhead in JSON. While the book's chapters make some distinction between the client and server sides of an application, it doesn't matter if you're a frontend, backend, or full-stack developer. The principles behind using JSON apply to both the client and the server, and in fact, developers who understand both sides of the equation generally craft the best applications.
Table of Contents (12 chapters)
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11
Index

Getting the progress of a request using jQuery

jQuery abstracts the various progress reporting mechanisms of the underlying XMLHttpRequest object in a platform-agnostic way, giving you the ability to determine whether your request succeeded or failed. You do this by registering functions that the jQuery AJAX handler will invoke when an error occurs or the results are successfully loaded.

How to do it...

Here's doAjax rewritten to support getting notifications on failure, regardless of whether the event succeeds or fails:

function doAjax() {
  $('#debug').html("loaded... executing.");
 
  var request = { 
    call: "kf6gpe-7"
  };

  $.ajax({
    type: "POST",
    url: "/",
    data: JSON.stringify(request),
    dataType:"json",
  })
  .fail(function() {
    $('#debug').append("<br/>failed");
  })
  .always(function() {
    $('#debug').append("<br/>complete");
  });
}

The new...

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