Author: Kris Zyp

dstore 1.1 released

We have released dstore version 1.1, which features a new set of stores for local DB storage. This feature provides the ability to store data locally in browsers, and use high-performance querying capabilities through the disparate technologies of IndexedDB and WebSQL (and localStorage), through the consistent dstore interface. Complex queries can be formulated in your application, and data can retrieved from local database storage with the same APIs and query format as is currently supported with other stores. Queries can

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Minimizing Dijit Instances in dgrid

Dijit and dgrid provide a powerful set of user interface components, allowing for fast construction of sophisticated web applications with excellent performance and interactivity. However, one particular configuration of dgrid that can impact memory and performance: heavy use of persistent Dijit editors within grid cells. The dgrid’s Editor plugin makes it very easy to leverage various Dijits for editing cells. However, using the default “always-on” mode, where a Dijit is instantiated for every editable cell, in combination with a several

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Memory Consumption: the Externality of Programming

Performance is a critical part of most applications. Research continually shows that good performance is essential for a good user experience. Reasonable load times, smooth animations, and responsive interaction gives user a sense of interaction and immersion, whereas slow load times frustrate users, and choppy animation and interaction quickly makes an experience awkward and disconcerting. As developers, we wisely work for better performance by understanding performance characteristics, and verifying performance with tests. However, one aspect of performance can be particularly

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Optimized Navigation: Isomorphic Resources

When building web applications, developers often face the dilemma of whether to use traditional server-side rendered pages, or client-centric applications that rely on Ajax/JSON data requests, with client-side rendering of data. These two approaches also tend to dictate navigation (among other things), leading to traditional page navigation or a single-page application (perhaps with hash-based navigation). With the traditional approach, content is delivered in HTML form, relying on browser-driven page loads for different views. However, modern applications with more sophisticated user

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Introducing dstore

Dojo has long distinguished itself with a robust and complete application architecture. And the foundation of this architecture has been the store interface, providing clean separation and consistent interface between presentation and data sources. We are committed to continuing to improve this architecture, and in this pursuit, we now releasing dstore, a next generation object store interface and set of data modeling components. dstore is an exciting new package that provides a number of significant improvements over the prior data

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REST tips

At SitePen, we have long been advocates for building web applications on a RESTful architecture. Over the last several years, it has been exciting to see organizations increasingly provide RESTful endpoints for the Dojo-based front-ends that we support and develop. A well-designed REST backend can be a excellent foundation for manageable, scalable applications, that will be ready to evolve into the future. I wanted to share a few tips for designing a set of RESTful services.

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Local Database Stores

Modern browsers have powerful new database capabilities that enable applications to store data locally, and perform advanced indexed queries without a network connection. Applications can be built with offline support without any disruption to data interaction, including searching. However, these database capabilities have traditionally been difficult to use across browsers since Safari only supports WebSQL (although version 8 is slated to include IndexedDB support), and Firefox and Internet Explorer only support the W3C’s IndexedDB API (Chrome supports both). And these

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Building on Persevere

Persevere is a server-side JavaScript framework that we started several years ago to help build RESTful web applications with clean separation of concerns, encapsulation, and the consistency of JavaScript in both client and server. Recently, we had the opportunity to work on a project that used the full capabilities of Persevere, leveraging many of its features and leading to some improvements as well. We wanted to share some insights on how to best leverage some of the unique features of

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Looking Ahead with Stores

Part of the foundation of the Dojo architecture is the data store layer. Dojo applications are built on a uniform interface for accessing different data sources, to make it possible for different presentation components to be used with different data models. We are continuing to work towards evolving and refining our data layer at SitePen. Lately we have been working on a new project called dstore, that represents our vision for the future of the Dojo data layer. The dstore

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Private Matters: Convention and Closures

Many object-oriented programming (OOP) languages provide a way to define private properties and methods. This allows objects to encapsulate functionality and state information. This encapsulation leads to a clear distinction between the internal implementation and a clean external interface. However, JavaScript does not have a native mechanism for declaring private properties and methods, in the same sense that other object oriented languages do. But, there are a few techniques that we can use to achieve the same results.

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