JavaScript templates

An alternative approach to XUL's own templating system is to use JavaScript templates.

This approach also provides a separation of formatting and structure from content, but relies on a JavaScript templating engine to have JavaScript-side business logic inject content into a template. And this does not require any use of RDF/XML, etc.

By syntax style

100% Standards-based (no custom syntax)

Pure JavaScript (JavaScript function calls generate HTML)

Note that such solutions can still allow for iteration to match other templating engines using succinct inline for-each constructs or the like by using Array iteration methods such as map or reduce.

• JsonML (without "Browser-Side Templates"); also can be used with JavaScript's JSON subset.
• Jamilih (similar to JsonML)
• domMaster and nodejs master_texthtml
• Mootools Template Engine (null-tech.com)

Pure HTML (JavaScript selectors in business logic find normal HTML to populate)

• PURE
• mustache (has some design logic, but brief syntax)
• Chain.js (dead link); explained here
• LightningDOM
• Mootools Template Engine (zealdev.wordpress.com)

XSL

• XSLTJS (for cross-browser use of XSL for templates)

E4X

• E4X for templating (though note E4X is deprecated)

Standards-friendly (custom attributes or embedding syntax, but uses mostly standard-compatible approach)

X/HTML/E4X/XUL with Namespaced custom attributes and elements

• Adobe Spry processing instruction attributes
• ASP.NET client templates
• Seethrough (uses E4X with namespaced attributes and elements; though note E4X is deprecated)
• XUL Templates (XUL-only)

Pure JavaScript embedded within HTML/XML design logic (ASP/JSP/PHP or curly braces style)

• EJS (Embedded JS)
• PureJSTemplate
• mjst

Custom approach

HTML+Curly braces {} with custom design logic

• ASP.NET client templates
• Templates in ExtJS (dead link; obtained via archive.org)
• JavaScriptTemplates
• JSmarty (a system based apparently more closely on Smarty, with many more functions, and with more recent contributions)
• jQSmarty: jQuery Smarty Plugin (dead link) (introduced here)
• JS Repeater
• JTemplates
• mjst
• Mjt
• mustache (thanks to janl)
• Templates in JQuery
• Templates in Prototype
• Whiskers.js
• Paperclip

HTML + Non-namespaced custom elements or attributes

• distal
• mjst
• Mjt
• google-jstemplate
• ZPT-JS

ASP/JSP-style custom design logic within <%...%>

• JavaScript Micro-Templating syntax similar to (asp|jsp|php)
• BetterJavascriptTemplates
• PureJSTemplate
• JSONML Browser-Side Templates
• BabaJS
• Templates in Prototype

By feature

Transforming an entire document into another through element/node matching templates

XSL

• XSLTJS (for cross-browser use of XSL for templates)

Generating DOM tree via JavaScript

• Monkberry with server precomiled templates, mustage-like syntax.