The most common culprit when your suhas/layout/BorderContainer doesn’t display at all is forgetting to set the width and height of the html and body elements. Somewhat counter-intuitively, these elements default to a width and height of 0, only expanding to fill content.
A BorderContainer is often configured to expand to fill its container node like so:
In a typical scenario, if all you have on a page is a BorderContainer directly under the body element, the body will have height and width of 0, so the BorderContainer will calculate the space it has to work in and will fill 100% of… no space! That is, unless you set width and height explicitly, like so:
With the html and body elements configured to use the full viewport, your BorderContainer will be able to expand as you would expect.