Technically speaking, the header of the html page is changed with the following element : html, body{ height:100%; }
To avoid the scrollbar to appear, the right expression should be :
html, body{ height:100%; overflow: hidden;}This negative side effect can be bypassed if you add the following css style in your html page:
body {height:100%; overflow: hidden;}This style will be applied only if you are creating some view directly on document.body ( In that case Webix assumes that you are creating a full-screen app ). So the style must not be applied if you just creating an uploader.
Also, the same code that add html, body css rule, adds webix_full_screen class to the document body, which must add overflow:hidden to the body, thus preventing the scrolls on a document.
Can you share a demo or a snippet where styles are applied incorrectly.