Here, let's just assume that in our web page, we have an HTML element with the id sigma-container to display our graph. This element's width and height can be whatever we want, and sigma will adapt the elements it adds into it by itself. Also, we must import sigma and add a script tag that will contain the JavaScript code.

Then, it's pretty easy: since sigma provides a plugin dedicated to load and parse GEXF graph files. So, all we have to do is to load the plugin and use it, as described in the plugin's documentation.

At this point, the graph should already be displayed, and manipulated with the mouse or touch: