Where to draw knowledge on ExtJS/Sencha for purely front ends a?

Good time of day.
Want to know where it is possible to derive knowledge on ExtJS/Sencha for purely front ends a?
And is it possible if English generally tight?
June 7th 19 at 14:59
1 answer
June 7th 19 at 15:01
If ExtJS 4 you can start with this.
In any case it is unlikely you will find anything better for ExtJS in Russian.

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