Estimated. reading time: 4 minutes, 25 seconds
There’s a general trend in crafting long-form site navigation that use an “off-canvas” UI model. In this mode, expanded site navigation consisting of more than half-a-dozen links is brought in from outside the browser window when the user calls for it.
The site that you’re reading now uses a variation of the technique that might be called “under-canvas”: if the browser window is narrow enough, the site navigation is hidden beneath the site content, and revealed by sliding the content to one side.
Either model works well in responsive design, but it’s also possible to have site navigation folded within the page, rather than above or below the main canvas area.