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Underscore Templates vs XSLT in-browser implementation

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When comparing Underscore Templates vs XSLT in-browser implementation, the Slant community recommends Underscore Templates for most people. In the question“What are the best JavaScript templating engines?” Underscore Templates is ranked 7th while XSLT in-browser implementation is ranked 31st. The most important reason people chose Underscore Templates is:

Due to Underscore's optimized performance and ease-of-use it can be deemed as most fit for use in small sections of your code, where you just want a quick and simple template to render your content.

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Common Questions

What are the best JavaScript templating engines?

Underscore Templates

XSLT in-browser implementation

Pros

Pro
For micro templating

Due to Underscore's optimized performance and ease-of-use it can be deemed as most fit for use in small sections of your code, where you just want a quick and simple template to render your content.

Pro
Pre-compilation

Underscore allows you to compile your template once before data is inserted to it.

Pro
Permits pipelining

I.e. apply one template on top of another.

Pro
AOP model

With ability to split feature implementation apart from main codebase, development became quite more manageable. Example: for data of particular type you could define own rendering or render refine rules; pipelining allows incrementally change UI by adding/removing elements depend of parameters, data values, previously rendered content.

Pro
Native multithreaded implementation

Only template engine which utilizes multithreading.

Pro
Native pre-compilation available

In some browsers(IE) XSLT during load is compiled into DLL. In others pre-loaded template allows to skip recurring parsing .

Pro
Accept native data out of JS heap

XML when stored, saved outside of JS heap, capable to work with amount of data 100x larger of JSON.

Pro
Native implementation

Supported in all browsers, starting from IE5.

Pro
Server side rendering

XSLT is available as in browser as on server side via various libs including highly optimized for CPU.

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Cons

Con
Not a true templating engine

template in underscore is simply a function which compiles a piece of template into HTML. It's useful for rendering HTML from JSON and it's not very useful when building complex frontend templates.

Con
Lack of SDLC for in-browser development

It will take time to collect complete gentleman set: debugging, modular development, documenting, unit tests, etc. Please share if know the book on subject.