Mechanisms are disclosed for delivering web content in a manner that allows user-specified manipulation of the content to be processed client side. An example web page comprises a plurality of modules organized into columns. The column widths can be resized by the user, and the modules can be moved from one column to another, or to different locations within a column. The various components of content within a module are delivered with attributes indicating whether the a given component is to be displayed or hidden at a particular column width. When a column is resized by the user, the amount of content that is displayed or hidden is adjusted based on the new column width.