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If you are looking for an introduction to the Ext JS grid component, you might find our comprehensive guide very useful. This article covers troubleshooting grids, and some of the solutions to common grid issues. These issues might include things like: Grid doesn’t show data Store didn’t load Grid is empty Grid didn’t render Grid not listening to store Did you define the grid height? Typically you’ll specify at least one of the following: grid = new Ext.grid.EditorGridPanel({ //other configs...
Did you render the grid? If you use a Grid as a child item of a Container, you MUST NOT explicitly render the Grid. If you need to render a grid, use one of the following: Does the element you rendered to exist? Did you load the store? Call store.load() Ext JS Tutorials. Ext JS 3 to 4 Migration. Ext JS 4 is the most comprehensive upgrade to the framework we've ever released. From completely overhauled packages like Data and Charting, to widgets like the Tree and Grid that were rewritten from the ground up, Ext JS 4 represents a new level of power and flexibility in RIA development.
In addition to enabling new features and capabilities, another goal of Ext JS 4 was to streamline the overall API and make it more consistent. Given these goals, it was not possible to maintain full backwards compatibility with Ext JS 3. However, we definitely recognize the need to make transitioning to Ext JS 4 as smooth as possible for our community. We are very pleased to introduce several new resources that will assist in migrating existing Ext JS 3 applications to Ext JS 4, and will hopefully minimize the difficulty and effort involved.
Ext JS 3 Compatibility Layer Ext JS 3 to 4 Migration Guide Ext JS Migration Demo App Ext JS Migration Screencasts Ext JS 3 Compatibility Layer Continued Improvement. Ext JS 4: Working with the Grid Component. Exclusive offer: get 50% off this eBook here Ext JS 4 First Look — Save 50% A practical guide including examples of the new features in Ext JS 4 and tips to migrate from Ext JS 3 with this book and ebook. by Loiane Groner | January 2012 | Java Open Source In this article by Loiane Groner, author of Ext JS 4 First Look we will cover some new features and enhancements in the Grid Component. (For more resources on JavaScript, see here.) The grid panel is one of the most-used components when developing an application Ext JS 4 provides some great improvements related to this component. The Ext JS 4 Grid panel renders a different HTML than Ext JS 3 Grid did. Before we examine the grid's new features and enhancements, let's take a look how to implement a simple grid in Ext JS 4: As you can see in the preceding code, the two main parts of the grid are the store and the columns declarations.
So far, nothing has changed. However, there are some changes related to plugins and the new features property. UI. EveryJS.com.