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Custom Template Engine and Template Source for Knockout.js that loads external templates. Supports native and jQuery templates.

branch: master

Version 2.0.5

What Is It

The Knockout.js External Template Engine extends Knockout.js to allow you to load templates asynchronously from a remote resource. It currently supports both native and jquery templates. Special thanks to Ryan Niemeyer for the assistance in getting jquery templates working in this version of the plugin.


  • Knockout.js 2.0 or later (you will need to look at the tagged 1.0 version if you need support for older Knockout.js)
  • jQuery 1.5 or later
  • jquery-tmpl only if you are using jquery templates
  • TrafficCop
  • infuser

The dependencies listed above are in the ext folder under in the repository.

Note: This project takes a depdency on a library called infuser. infuser no longer has an infuser.config object. It has been merged with infuser.defaults.

How To Use

  • In your HTML file, reference jQuery, jquery-tmpl (if you're using jquery templates), knockout.js, TrafficCop, infuser and the koExternalTemplateEngine.js file
  • By referencing koExternalTemplateEngine.js, you've automatically overridden the default Knockout.js template engine and added a new template source
  • Configure the koExternalTemplateEngine:
    • by default, if your external template files have ".html" as the file extension and live in the same directory as the requesting HTML file, then you can simply reference them by name (for example, "CustomerTemplate" will call down a CustomerTemplate.html file).
    • You can specify a template file suffix (like ".tpl.html") by setting the infuser.defaults.templateSuffix value
    • You can specify a template file prefix (like "template_") by setting the infuser.defaults.templatePrefix value
    • You can specify a different URL/path to the template files if you prefer to keep them in a different directory than the requesting HTML file by setting the infuser.defaults.templateUrl value.
    • You can override the default loading template html by providing your own custom html string to the infuser.defaults.loadingTemplate.content property.
    • You can override the default infuser options in any native template binding (jquery-tmpl engine does not support overrides at this point). For example: <div data-bind="template: { name: 'stats', templateUrl: 'templates/info'}"></div>
    • You can override $.ajax options two ways:
      • Set defaults via infuser.defaults.ajax (example: infuser.defaults.ajax.cache = false)
      • Set a value in-line via a template binding: <div data-bind="template: { name: 'stats', templateUrl: 'templates/info', ajax: { cache: false } }"></div>

See the example folder in the project for more information (& see below for how to run the examples). You can also use IIS on Windows if you make the root of the repository a virtual directory and then browse to example/{subfolder of choice}.

Build Dependencies

This project uses anvil.js for it's build/combine/minify/etc. To use anvil, you will need Node.js and npm. Three build outputs are produced in this project:

1) The default build creates the koExternalTemplateEngine.js & koExternalTemplateEngine.min.js files. Using either of these files will require you to include TrafficCop and infuser as separate script includes in your page. 2) The "combined" build creates koExternalTemplateEngine_all.js & koExternalTemplateEngine_all.min.js - which includes TrafficCop and infuser as part of the output. 3) The "amd" build creates an amd-style module of just the koExternalTemplateEngine.js file - creating koExternalTemplateEngine-amd.js & koExternalTemplateEngine-amd.min.js.

To run the build from the command line you do the following (at the project root): anvil -b

To run the examples, run anvil --host. Examples will be accessible by going to http://localhost:3080/example under the following sub-folders:

  • jquery
  • jqueryWithOptions
  • native
  • native-nested-alt-locations
  • native2

Examples using the AMD module version can be found under http://localhost:3080/example/amd, in the following folders:

  • native
  • native-nested-alt-locations
  • native2
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