Denjucks

Denjucks is a powerful templating language and engine for Deno applications, and provides an easy syntax for making scalable web applications using Deno.

Internally, Denjucks is a fork of Mozilla's Nunjucks for NodeJS, with the following changes:

  • Uses ESM syntax instead of CommonJS syntax
  • Uses Deno file system APIs instead of NodeJS file system APIs
  • Wraps all NodeJS dependencies into ESM compatible syntax

Installation

To install, simply import the raw module from the github repository in your Deno code:

import denjucks from "https://raw.githubusercontent.com/denjucks/denjucks/master/denjucks.js";

When running the file the first time, the source code for denjucks will be downloaded and cached on your machine.

Basic Usage

Rendering a template from a string:

import denjucks from "https://raw.githubusercontent.com/denjucks/denjucks/master/denjucks.js";

console.log(
    denjucks.renderString("hello {{ txt }}", {txt: "world"})
);

will print to the console:

hello world

Rendering a template from a file:

Remember to include the --allow-read flag when running the deno command or an error will be thrown, as the deno sandbox prevents reads by default

With the file _base.html as the parent template:

<html>
    <head></head>
    <body>
        {% block content %}{% endblock content %}
    </body>
</html>

And the file index.html as the template that will extend the parent:

{% extends "_base.html" %}

{% block content %}
    <p>Hello {{ txt }}</p>
{% endblock content %}

Calling render on index.html:

import denjucks from "https://raw.githubusercontent.com/denjucks/denjucks/master/denjucks.js";

console.log(
    denjucks.render("index.html", {txt: "World"})
);

Will print to the console:

<html>
    <head></head>
    <body>
        <p>Hello World</p>
    </body>
</html>

Documentation

Since Denjucks is a port of Nunjucks, it uses the exact same syntax as Nunjucks. See here for full documentation on Nunjucks.

References

Nunjucks is a full featured templating engine for javascript. It is heavily inspired by jinja2. View the docs here.