Horizontal Scrollbar of HTML Div element appears when a CSS style applies specific height as well as width to the Div tag along with CSS properties "overflow: scroll" and "white-space: nowrap".
If you have any idea about approximate height of the Div tag containing large content then you can set the height of Div tag using CSS style. CSS White-Space property with value nowrap allows the content to exand the text along horizontal direction until there is no HTML <br /> tag, it does no wrap the text within the boundary of Div tag specified using CSS width property. These CSS Div styles display a horizontal scrollbar below the HTML Div. See the sample below: