This tutorial shows how to use Dojo to create a rich Internet application. To do this instantiates the widgets whenever a widget markup is located. We will. [MARC Russell] (Digital Reasoning Systems; author, Dojo Goodness Web blog) has written an authoritative work for the community-built Dojo open source DHTML/AJAX JavaScript toolkit (version ). This work is more a manual than a tutorial. Part 1 is a standard reference library. JavaScript is not just a toy language, how Dojo is built on top of it, and how both are .. It also includes a very good DOM tutorial and ref- erence. • CSS is often.

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has been taken in the preparation of this work, neither the author(s) nor Apress shall have any liability to Chapter 5: Managing User Interaction with Dojo. Servlets and JSP and this tutorial Available at public. Servlets and JSP, and this Other files are loaded on-the-fly based on mtn-i.infoe statements. – Copy 3. This Dojo tutorial covers:2 5/19/; 3. Introduction to Dojo What is Dojo? Dojo is JavaScript framework released as open source software.

Asynchronous communication[ edit ] One important feature of Ajax applications is asynchronous communication of the browser with the server: information is exchanged and the page's presentation is updated without a need for reloading the whole page. Dojo provides an abstracted wrapper dojo. Using this approach, it is easy to have the data a user enters into a form sent to the server "behind the scenes"; the server can then reply with some JavaScript code that updates the presentation of the page. Packaging system[ edit ] Dojo provides a packaging system to facilitate modular development of functionality in individual packages and sub-packages; the base Dojo " bootstrap " script initializes a set of hierarchical package namespaces — "io", "event", etc. After initialization of the root namespace, any Dojo package can be loaded via XMLHttpRequest or other similar transport by using utility functions supplied in the bootstrap. It is also possible to initialize additional namespaces within or parallel to the "dojo" namespace, allowing extensions of Dojo or the development of private Dojo-managed namespaces for third-party libraries and applications. Dojo packages can consist of multiple files and can specify which files constitute the entire package. Any package or file can also specify a dependency on other packages or files; when the package is loaded, any dependencies it specifies will also be loaded. Workarounds for cross-domain loading of most Dojo packages are provided though this requires a specialized build of Dojo. Dojo also provides a mechanism for building "profiles"; the build system takes as input a list of packages, and uses Rhino to create a single compressed JavaScript file containing those packages and all their dependencies. This allows all necessary code to be loaded and initialized at once, and permits caching of the code most web browsers do not cache files loaded via XMLHttpRequest[ citation needed ]. Pre-built profiles for some common use cases are available for download from the same location as the full toolkit.

Learn by Examples Examples are better than words. Examples are often easier to understand than text explanations.

This tutorial supplements all explanations with clarifying "Try it Yourself" examples. If you try all the examples, you will learn a lot about JavaScript, in a very short time!

Why Study JavaScript? JavaScript is one of the 3 languages all web developers must learn: 1. HTML to define the content of web pages 2.

CSS to specify the layout of web pages 3. JavaScript to program the behavior of web pages Web pages are not the only place where JavaScript is used. Many desktop and server programs use JavaScript. This allows all necessary code to be loaded and initialized at once, and permits caching of the code most web browsers do not cache files loaded via XMLHttpRequest[ citation needed ]. Pre-built profiles for some common use cases are available for download from the same location as the full toolkit.

Client-side data storage[ edit ] In addition to providing support functions for reading and writing cookies , Dojo formerly supported a local, client-side storage abstraction named Dojo Storage.

JavaScript Tutorial

Dojo Storage allows web applications to store data on the client-side, persistently and securely and with a user's permission. It works across existing web browsers, including Internet Explorer , Firefox , and Safari. When included in a web page, Dojo Storage determines the best method for persistently storing information. On Firefox 2, it uses native browser persistence; on other browsers, it uses a hidden Flash applet.

Dojo Documentation

For a web application that is being loaded from the file system i. The programmer using Dojo Storage is abstracted from the storage mechanism used and is presented with a simple hash table abstraction, with methods such as put and get.

Dojo Storage is not supported in versions later than the 1. Server-side data storage[ edit ] As of January , Dojo includes the following example server-side datastore implementations in the dojo.

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