This module adds the ability to dynamically generate HTML files for your hem project.

Usage no npm install needed!

<script type="module">
  import hemRenderHtml from 'https://cdn.skypack.dev/hem-render-html';



This module adds html rendering support to hem (Bundler for Node/CommonJS/Web Apps). Currently it only uses .eco templates but in the future I will make it pluggable. I created this module to allow myself the ability to create my static html pages dynamically. I wanted to be able to create a header and footer partial template used for all static pages in my site.


  1. Add hem-render-html and eco to the dependencies in your package.json file in the root directory of your hem project. Here is an example:

      "name": "hem-render-html-example",
      "version": "0.0.2",
      "dependencies": {
        "serveup": "~0.0.4",
        "hem": "~0.1.7",
        "eco": "1.1.0-rc-3",
        "es5-shimify": "~0.0.1",
        "json2ify": "~0.0.1",
        "jqueryify": "~0.0.1",
        "spine": "~1.0.6"
  2. Once hem-render-html is added to your dependencies run the following command from your project root:

    npm install .
  3. Add a slug.js file to the root of your project with the following:

    var hem  = new (require('../lib/hem-render-html'));
    var argv = process.argv.slice(2);
  4. Add your html templates and global context file.

    Template Files

    hem-render-html is setup to generate html files for all files within the html dir that have an .eco file extension. The one exception is if the filename starts with two underscores __. This convention allows us to easily create partial templates that can be used in full page templates. For example I commonly have __header.eco and __footer.eco partial templates. For a good example of this in a project you can look in the examples folder of this repo.

    Render Helper

    To render another template (most commonly a partial template like __header.eco) from within another template you use the render helper. Here is an example use of the render helper with a local context object passed in:

    <%- @render "__header.eco", {pageName: 'Home'} %>

    Below is information on the global and local context objects that are available to templates.

    Global Context

    hem-render-html loads a global context file before it renders an html page. This allows you to set global data and helpers available from all your templates. This file is located in the root of the html folder and is named __global.coffee. The object exported from this module is then available to all templates.

    Local Context

    When rendering a partial template with the render helper you can pass a local context. This local context holds values specific to the template being rendered. By default these local context values are merged with the global context values (the local context values override global context values when merged).

    The render helper does have an optional third boolean argument includeGlobalContext. This argument is default on which merges the local context with the global context. If you do not want your partial template's context object to include the global context values you can set this to off. When off only the values in the local context are passed to the template. Here is an example render helper with includeGlobalContext off:

    <%- @render "__footer.eco", {}, off %>
  5. Use it! Now when you run hem in your project root it will generate html files for your html templates. For example to bunlde your app run:

    hem bundle

    Or run the development server:

    hem server