Question

I need to re-render an image (Ext.Image) after some events.
I found doComponentLayout function but it didn’t work for me unfortunately.

How can I re-render an image which is an item of form?

Answer 1

There is a common technique to add ? and random string at the and of image’s src. Server ignores this part of src but browser thinks that you are setting new src.

var originalSrc = 'http://example.com/someimg.png';
var antiCachePart = (new Date()).getTime();
var newSrc = originalSrc + '?dc=' + antiCachePart;
// now newSrc is equal to something like "http://example.com/someimg.png?dc=1352748617627"
img.setSrc(newSrc);