The default name for the filter is just the name of the function; however, you can customize it by passing in an argument to the function – e.g, _filter(formatdate). Next, we are adding the filter to the Jinja environment, making it accessible. This makes it useful as a replacement for loops. Because sometimes, template variables contain data that you intend to be rendered as raw HTML, in which case you don’t want their contents to be escaped. Syntax Highlighting Plugins are available in various editors to support the jinja syntax highlighting of Nunjucks. Leveling the Playing Field The next element in our markup requires a bit of background information before it can be introduced. HTML5 includes a number of new elements, such as article and section, which we’ll be covering later on.