But we’ve also added new components to the framework

But we’ve also added new components to the framework. Two of the most popular extension components –

RowEditor and TreeGrid – are now built into the framework itself, rewritten to meet the high quality

standards we expect of Ext JS components.

The End of FormLayout

When we asked what are the hardest things to do with Ext JS 3, one answer came up more than almost any

other – laying out forms. Forms have always been tied to a FormLayout, which works like a

straightjacket to limit a form’s flexibility. With Ext JS 4, forms can use any layout, making it easy

to achieve any look and feel imaginable.

ARIA, RTL and Much More

Two of the most frequently voiced non-component requests were for better ARIA and RTL support. With Ext

JS 4 we’re baking Section 508A (accessibility) and Right-to-Left language support right into the

framework, joining the world class accessibility support we already have in Ext JS 3.

There are hundreds of improvements, new features and bug fixes coming in Ext JS 4 – far too many to

list in a blog post. We’ll be posting a series of articles over the coming weeks with lots more

information, as well as a full guide once the product launches.